Since we must write this, let's ask which factor consistently requires a tiny population as a prerequisite for its occurrence, even though each of the following has a better probability of influencing gene frequency in a small proportion of small populations.
Genealogical drift is the basic response. Each of these mechanisms has an impact on the genetic makeup of populations, but only natural selection consistently increases how well-adapted an organism is to its environment.
The severity of drift and the incidence of inbreeding in the population are related to population size, or more precisely, the effective population size. Due to stochastic sampling error, small populations typically lose genetic diversity more quickly than large populations (i.e., genetic drift). This is because
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Which sentence is the best example of a living thing obtaining matter and
energy?
OA. A sea anemone moves its tentacles in response to touch.
B. An African violet plant grows from a leaf cut from an existing
plant.
C. A tadpole increases in size as its cells divide into many more cells.
D. An oak tree absorbs sunlight and carbon dioxide through its
leaves.
Answer: D. An oak tree absorbs sunlight and carbon dioxide through its leaves.
Explanation: verified
how to calculate partial pressure
21. Energy is the ability to
gain power.
do work.
measure electricity.
apply heat.
Why are soft-bodied organisms less likely to leave a fossil trace than hard-bodied organisms?.
Proteins are soft-bodied organisms less likely to leave a fossil trace than hard-bodied organisms.
soft-bodied organisms are much more likely to decay than organisms with difficult body elements along with bones, shells or enamel. as a consequence the fossil document consists of many stays of creatures like fish, clams and mammals, and relatively few stays of creatures like jellyfish, earthworms or wild flora.
Animals with difficult shells and skeletons are represented nicely within the fossil record. alternatively, soft-bodied animals are probable represented very poorly. it is possibly that maximum gentle-bodied species that ever existed are long gone all the time with out a trace. Land animals are probable very poorly represented as nicely.
The maximum not unusual approach of fossilisation is petrification through a system called permineralisation. After a shell, bone or enamel is buried in sediment, it is able to be exposed to mineral-rich fluids moving via the porous rock fabric and turns into filled with preserving minerals consisting of calcium carbonate or silica.
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when azt, a dideoxynucleotide was added to cancer cells, the dna replication stopped and cancer cells stopped proliferation. during which stage of such inhibition would happen?
DNA replication and cancer cell proliferation both came to an end during S phase.
How can cancer be found?Weight fluctuations, such as unanticipated growth or reduction. Skin changes like redness, yellowing, or darkening, as well as open wounds that aren't healing or changes to existing moles. changes to the bladder or bowel habits. breathing problems or a persistent cough.
What kind of cancer has the highest mortality rate worldwide?Roche | Lung cancer is the most fatal cancer in the world. More people die from lung cancer each year than from breast, colorectal, & prostate cancers put together. 1 Despite the recent surge of novel, life-extending medications, lung cancer still has a high mortality rate.
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What is the role of epinephrine in cell signaling?
Epinephrine plays a crucial role in the fight-or-flight response as a cell signaling chemical.
What is cell signaling?
Chemical signals are frequently used by cells to communicate. These chemical signals, which are proteins or other compounds made by the transmitting cell and released into the extracellular space, are frequently secreted by the cell.
Role of epinephrine in cell signaling:
An essential cell signaling molecule in the fight-or-flight response is epinephrine. Epinephrine, also referred to as adrenaline, is a powerful messenger that signals various cell types throughout the body with a variety of effects. Epinephrine binds to receptors on smooth muscle cells that surround the bronchioles in the lungs. As a result of the muscles relaxing, the bronchioles widen, allowing more oxygen to enter the bloodstream. Epinephrine causes the pacemaker cells of the sino-atrial node of the heart to beat more quickly. This speeds up the flow of oxygen, glucose, and other chemical signals to the cells that require them. Additionally, epinephrine constricts particular subcutaneous muscle cells, resulting in beads of sweat and raised hairs on the skin's surface.Hence epinephrine plays a crucial role in cell signaling.
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Explain the concepts of structure and function. How might structure and function relate to biology (the study of living things)?
Please give me an explanation!! Will mark as brainliest !!!! This will be worth 10 points!!!!
Structure dictates function is one among biology's core ideas; how something is put together enables it to carry out a certain purpose. This is often seen at every level of the biological organization hierarchy, from atoms to the biosphere.
The link between structure and performance is what allows all living things and living systems, from molecules to organisms, to function successfully.
What about structure and function?Numerous fields of science and engineering share the thought of structure and function, sometimes referred to as form and function.Scientists might want to understand how an organism's structure or the composition of a substance affects how it functions or behaves.Then, a spread of other phenomena may be explained by this underlying physical link (a relationship between structure and function).For instance, the body's metabolic requirements must be satisfied by the flow of oxygen and CO2 through the tissues and into the lungs.Load-bearing structures include things like buildings, skeletons, anthills, beaver dams, and salt domes.The infrastructure of a person's society is made up of buildings and non-building structures that are the outcome of construction.Production is simpler and of higher quality when workers with similar abilities and experiences are grouped together.There is little time spent acquiring new skills because roles and responsibilities don't vary often, and responsibility is clear .Learn more about structure and performance here:
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what would the potential size range be for pumpkin offspring produced from the cross between a parent with genotype aabbccddee and a parent with genotype aabbccddee?
The potential size range for pumpkin offspring produced from the cross between a parent with genotype aabbccddee and a parent with genotype aabbccddee will be with only one genotype since both parents can produce only one type of gamete, i.e., abcde.
What is a gametic genotype?A gametic genotype can be defined as the specific combination of alleles or gene variants that it may carry out to form a zygote during fertilization.
Therefore, with this data, we can see that a gametic genotype depends on the alleles in the parents to produce the zygote.
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which of the statements describe how inducers cause changes in gene expression?
a. inducers bind to activator proteins and enhance the ability of the activator to bind DNA
b. inducers enhance transcription of all genes
c. inducers are ions that are essential for the function of RNA polymerase
d. inducers allow transcription of specific genes
e. inducers are small molecules that bind to DNA to enhance transcription of target genes
Option A. inducers bind to activator proteins and enhance the ability of the activator to bind DNA, describe how inducers cause changes in gene expression.
Gene expression is the process with the aid of which statistics from a gene are used within the synthesis of a functional gene product that enables it to provide end merchandise, protein, or non-coding RNA, and in the long run have an effect on a phenotype, as the very last effect.
Gene expression is a tightly regulated manner that allows a cell to reply to its changing environment. It acts as an on/off switch to control while proteins are made and add a quantity control that will increase or decreases the number of proteins made.
Gene expression is prompted by way of numerous factors, consisting of molecules inside the cell, mutations inflicting dominant poor consequences and haploinsufficiency, signaling molecules from surrounding cells and the surroundings, and epistasis. various molecules in the mobile modulate gene expression.
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which of the cellular junctions are physically linked with the cytoskeleton? adherens junctions, desmosomes, and gap junctions tight junctions, adherens junctions, and desmosomes adherens junctions and desmosomes tight junctions, gap junctions, and desmosomes
The cellular junctions are physically linked with the cytoskeleton are:
1. Adherens junctions
2. Desmosomes
3. Hemidesmosomes
Chromosome segregation and cytokinesis in mitosis are mediated by the cytoskeleton, which also participates in cellular signaling. It interacts strongly with the plasma membrane, affecting the intracellular mobility of organelles and vesicles and acting as a framework for cellular contents.
Desmosomes help in force transduction by tying together the cytoskeletons of nearby cells. Strong adhesion between adjacent cells is produced by adherens junctions, which use specific proteins called cadherins and catenins. They resemble desmosomes but differ in their molecular make-up.
Hemidesmosomes (HD) are specialized junctional complexes that help stratified and other complex epithelia, including the skin, cornea, various portions of the gastrointestinal and respiratory tract, and the amnion, link epithelial cells to the underlying basement membrane.
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Describe the cell cycle.
Which of the following is not a kingdom?
A) Fungi
B) Protista
C) Mammals
D) Plants
Answer:
The answer is C.
Explanation:
which amino acid would you expect to be part of an alpha-helix from the gpcr signaling protein? a. leucine b. asparagine c. tyrosine d. glutamic acid
The amino acid to be part of an alpha-helix from the gpcr signaling protein is leucine.
One of the three necessary branched-chain amino acids is leucine (BCAAs). Skeletal muscle can utilise these amino acids to provide energy during exercise.
Consuming foods with complete proteins provides adequate amounts of these amino acids. Foods including meat, poultry, fish, eggs, and milk fall under this category. Studies have not consistently demonstrated that consuming supplements of these amino acids enhances exercise performance, increases muscle mass, or aids in exercise recovery.
Leucine may aid in bone and skin repair. Lean body mass and muscle growth could both be accelerated. It might boost human growth hormone production (HGH). It might aid in blood sugar regulation.
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what is the third difference that you have learned about in this lesson?
The third difference between plants and animals from the lessons learnt so far in this class is that:
Plants can manufacture their food by themselves while animals cannot but depend on organisms for food.
Why plants can make food on their own and animals cannotPlants are able to synthesize their food by themselves through photosynthesis due to the presence of chlorophyll in their chloroplasts. Animals cannot produce food on their own simply because they lack the green pigment chlorophyll and so, they depend on other organisms for food.
In conclusion, it can be deduced that plants are autotrophs while animals are heterotrophs.
Complete question:
Biology/ characteristics of living organisms/differences between plants and animals.
What is the third difference that you have learned about in this lesson between plants and animals.
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zion hidden ecosystem with more plants, animals, and water than the surrounding environment. what is the best explanation for why this occurs? (there may be more than one correct answer.
You might be referring to this question - 'Part Of The Hanging Canyon Is Home To A Hidden Ecosystem With More Plants, Animals, And Water Than The surrounding environment. what is the best explanation for why this occurs?'
Here is the solution. The Hidden ecosystem in the Hanging canyon has more of an ecosystem because of the climate there.
Since the Hanging Canyon is big enough to have an ecosystem, it does have one and more richer one as compared to its surroundings. The reason behind this is that it has a more humid and cooler climate. The surrounding regions are comparatively hotter.
It is because of the environment that more flora and fauna are found here.
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Which statement explains why the tetra fish are able to produce a green glow?
A.
The tetra fish were bred with jellyfish, which produced offspring that can make the protein for green light.
B.
The genetic material of both the jellyfish and tetra fish were combined, which created a fish with all traits from both species.
C.
The inserted gene gave the tetra fish the ability to make the protein that produces green light.
D.
The protein that produces green light was taken from the jellyfish and injected into the tetra fish.
Answer:b maybe
Explanation:
why do ecologists ask questions about events and organisms that range in complexity from an individual to the biosphere
Ecologists investigate events and animals ranging by complexity from either a specific individual to the whole biosphere in order to comprehend linkages within the biosphere.
What is biosphere ?All ecosystems on Earth that support life are collectively referred to as the biosphere. The biosphere includes everything, including the deepest tree roots, the shadowy oceanic depths, lush rain forests, majestic mountain summit, or transitional zones like this one marine and terrestrial ecosystems converge. The biosphere, usually referred to as the ecosphere, seems to be the totality of all ecosystems on the planet. A "life zone" surrounding Earth is another name for it. With few inputs and outputs, the biosphere is essentially a closed loop with respect to matter.
What are the three example of biosphere and its types ?The biosphere, which includes both soil, water, and air, is the area of the planet wherein life can be found. These three parts are known as that of the lithosphere, hydrosphere, or atmosphere. Its types include: The vast biosphere is split up into various biomes. Scientists divided biomes into five categories: aquatic, tundra, grassland, woodlands, and deserts.
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a fracture of the ischial tuberosity might be expected to most directly affect the muscles that produce which lower limb movement?
Flexion of the leg The ischial tuberosity is the origin of the hamstrings muscles, so fracturing this bone would effect its origin.
Hamstring originates from the ischial tuberosity and inserts onto the adductor tubercle of the femur. The gracilis adducts the thigh flexes the leg, and aids in medial rotation of the leg. They are weakest adductor muscles.
Long head of the biceps femoris originate from the ischial tuberosity of the pelvis extending to the posterior side of the femur, They also crosses the knee .On the other hand biceps femoris crosses laterally while semimembranosus and semitendinosus cross medially.
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the three important ideas mendel postulated concerning the transmission of traits from parents to offspring include:
The three essential thoughts Mendel postulated regarding the transmission of traits from mother and father to offspring include:
1. An character carries two variations of genes in step with the trait.
2. the two alleles of a gene separate during gamete formation so that every gamete receives a single allele in keeping with the trait.
3. tendencies exist in two paperwork -dominant and recessive.
He made 3 key choices approximately his experiments that played a crucial role in the development of his legal guidelines of inheritance management over breeding, use of purebred flowers, and statement of “both-or” tendencies that appeared in the simplest trade bureaucracy.
The important thing principles of Mendelian inheritance are summed up with the aid of Mendel's three legal guidelines: the regulation of independent assortment, the law of Dominance.
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in protostome development, multiple choice there is no coelom. the mouth forms from the second embryonic opening, not from the blastopore. the coelom forms from mesodermal outpocketings of the gut. the blastopore becomes the anus. the blastopore becomes the mouth.
In protostome development, the blastopore becomes the mouth.
What is protostome development?The blastopore develops into the mouth in protostomes, while the anus emerges from an aperture later in development. The blastopore develops into the anus in deuterostomes, while the mouth forms subsequently. Metazoans are classified as protostomes or deuterostomes based on their embryonic development. Deuterostomes include chordates and echinoderms, whereas protostomes are primordial invertebrates. This classification aids in understanding the links between various animal groupings. A protostome, commonly known as Protostomia, is a phylum of the Kingdom Animalia (animals). They exhibit spiral determinate cleavage, an embryonic mouth that develops before the anus, real tissues, and are bilaterally symmetric. Protostomia, which means "first mouth," refers to the development of the mouth in protostomes.
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Which one of the following statements about the redox reactions of the electron transport chain is correct?
a. The redox reactions of the electron transport chain are directly coupled with the synthese of ATP
b. The redox reactions of the electron transport chain are directly coupled to the movement of protons across a membrane
c. The electron transport chain takes electrons from water and gives them to oxygen
d. NADH gains electrons in the initial reaction of the electron transport chain
e. The oxidation of NADH is directly coupled to the reduction of oxygen to water
The redox reactions of the electron transport chain are directly coupled to the movement of protons across a membrane.
The electron transport chain is a collection of four protein complexes that couple redox reactions, resulting in an electrochemical gradient that leads to the formation of ATP in a process known as oxidative phosphorylation. It occurs in both cellular respiration and photosynthesis in mitochondria.
The electron transport chain, the final stage of cellular respiration, is responsible for transferring energy from electron carriers to even more ATP molecules, the "batteries" that power work within the cell.
The electron transport chain produces the most ATP of any step, with 28 molecules produced. This results in a total of 32 ATP molecules for the entire cellular respiration process.
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which of the following is a hypothesized benefit of foam roller exercises? 1. increased overlap of the sarcomeres within muscle 2. restored water balance in the muscles and fascia 3. significant reduction in scar tissue 4. increased protective tension in fascial tissues
The hypothesised benefit of foam roller exercises is option 4: increased protective tension in fascial tissues.
By releasing adhesions in your muscles and connective tissue known as myofascial buildup, using a foam roller can help reduce muscle tenderness. Foam rolling can improve blood flow by exerting pressure on specific points on muscles, tendons, and ligaments to loosen tight soft tissue.
Foam rolling is said to reduce muscle soreness and tiredness while also increasing muscular performance and flexibility. When using a foam roller, athletes exert pressure to the soft tissues while rolling, whereas when using a roller massager, the pressure is applied to the target muscles with the upper extremities.
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a characteristic 9 2 arrangement of microtubules, consisting of nine doublet microtubules surrounding a pair of single microtubules describes the ultrastructure of which of the following cellular structures?
The ultrastructure of motile cilia and flagella is described by a distinctive 9+2 arrangement of microtubules, consisting of nine doublet microtubules around a pair of single microtubules.
What contains the nine doublets of microtubules encircling a pair of single microtubules in a 9+2 arrangement?A 9+2 microtubule skeleton, which consists of nine doublet microtubules encircling a pair of central singlet microtubules, often makes up the complex organelle known as the motile cilium.
The axoneme, a core bundle of microtubules, is a component of both flagella and motile cilia. Nine doublet microtubules make up the axoneme, which is centered on a pair of single microtubules. The 9+2 arrangement refers to the configuration of microtubules in the cross-secretion of flagella and motile cilia.
A and B tubules make up each of the nine doublet microtubules. The 9+2 microtubules are connected with additional auxiliary proteins, which give them their stiffness and elasticity.
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explain why the amplification of surface area is important to the function of chloroplasts and mitochondria.
To have the power to convert carbohydrates into ATP, chloroplasts require an increase in surface area.
What are the mitochondria's primary roles?Definition. The majority of the chemical energy energy to operate the cell's biochemical reactions is produced by mitochondria, which are membrane-bound cell organelles. Adenosine triphosphate, a little molecule, serves as a storage space for the chemical energy generated by the mitochondria.
Where can you find mitochondria?
Cellular organelles called mitochondria transform the energy from the food into a state that can be utilized by cells. Numerous mitochondria, which are found in the liquid surrounding the nucleus of each cell, number in the hundreds to thousands.
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Besides recombination, what other event in meiosis increases the genetic diversity of the gametes?.
Answer:
Crossing over.
Explanation:
Crossing over is when the two sex cells or gametes exchange their genetic material during sexual reproduction to create 2 UNIDENTICAL daughter cells.
Unidentical daughter cells = genetic variation because they are not identical.
How is the energy produced by photosynthesis stored?
Answer:
This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules. Inside the plant cell are small organelles called chloroplasts, which store the energy of sunlight.
Energy produced by photosynthesis is stored inside the glucose molecules(i.e, sugars).
What is photosynthesis?
It is a process in which green plants and other autotrophic organisms make use of sunlight, water and carbon dioxide to synthesize nutrients. They store energy in the form of sugars. Oxygen is generated as a by-product of photosynthesis, and it involves the use of the green pigment chlorophyll.
Algae also make use of photosynthesis to convert solar energy to chemical energy. Oxygen is once again a by-product of this reaction.
Photosynthesis occurs in all plants and blue-green algae. It takes place in all green parts of a plant including its leaves, stems, sepals etc.
Hence, the energy produced as a result of photosynthesis is stored in organic molecules (glucose, i.e, sugars).
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Which of the following statements regarding fecal transplant is correct?
a. Donors and recipients must be carefully matched to prevent an immune reaction in the recipient
b. Fecal matter must be carefully disinfected and screened for viruses, cysts, and endospores before transfer to a recipient patient.
c. This treatment is designed to jump-start the intestinal microbiota after an infection with Clostridium difficile resuts in acute diarrhea.
d. The goal is to completely eradicate Clostridium difficile from a patient's gut microbiota and replace it with a healthy community
Option B is correct Fecal matter must be carefully disinfected and screened for viruses, cysts, and endospores before transfer to a recipient patient.
Fecal transplantation is the process of removing feces, often known as stool or poop, from a healthy donor and placing them into the digestive system of a patient. By introducing beneficial bacteria into the recipient's intestines, the technique can control the infection Clostridium difficile, or C. diff. Both adults and children can undergo FMT. The restoration of beneficial bacteria via fecal transplant has been shown to help control C. diff and prevent its recurrence. FMT has the potential to control C. diff more reliably than antibiotics in several situations.
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The process by which carbon is cycled between the atmosphere, land, water, and organisms.
The process by which carbon is cycled between the atmosphere, land, water, and organisms is called the carbon cycle.
Atmosphere is the mixture of gases present in any planet. These mixture of gases are said to be enveloping the whole planet which remains at its position to the gravitations force of that particular planet. The earth's atmosphere is composed of 78% nitrogen, 21% oxygen, and one percent other gases.
Carbon cycle is the flow of carbon between different living and non-living forms. Carbon is the most vital atom that makes up almost everything in the earth and hence it is necessary to maintain its cyclic flow and prevent it from being depleted to maintain the continuity of life.
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Based on your knowledge of microbial genetics and microbial pathogenesis, where do you think the genetic information for endotoxins are located?.
The genetic information of endotoxin is located in the chromosomes.
Endotoxins are the type of toxins present inside the bacterial cell. They are also known by the name pyrogens and they ruin the immune system. The location of endotoxins is the cell wall of Gram-negative bacteria. The nature of endotoxins is lipopolysaccharide.
Chromosomes are the compact form of DNA. These are comprised of DNA and histone proteins that are bound together in a highly packed form. The genetic material is transferred from parent to offspring in this compacted chromosomal form. Each chromosome is made of two sister chromatids which are joined together at the site called centromere.
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Describe how the two tools of molecular biology—often described as scissors and glue—are used in conjunction with plasmids to make copies of a gene of interest.
Restriction enzymes act as molecular scissors producing cuts at or near sequence specific regions (i.e, restriction sites) at both the strands of a double stranded DNA molecule. On the other hand, DNA ligase enzymes act as molecular glue and help in joining the fragmented DNA pieces together by forming phosphodiester bonds.
What are restriction enzymes?
Restriction enzymes are naturally found in bacterial and archaebacterial cells. Such enzymes protect these unicellular cells by cleaving and destroying foreign genetic particles injected by bacteriophages (i.e, viral molecules responsible for infecting bacterial cells). Classically, there are four types of restriction enzymes i.e, types I, II, III and IV. Example: EcoRI, EcoRII, HindIII, etc.
What is DNA ligase?
DNA ligase, a specific kind of enzyme helps in connecting fragmented DNA strands by facilitating the creation of a phosphodiester bond. It helps the cells to repair single-strand breaks in their duplex DNA, while other varieties (like DNA ligase IV) may only repair double-strand breaks (i.e. a break in both complementary strands of DNA). DNA ligase uses the corresponding strand of the double helix as a template to repair single-strand breaks, producing the last phosphodiester bond necessary to finish the repair of the DNA. Thus, both DNA replication and DNA repair need DNA ligase. Example: T4 DNA ligase, E.coli DNA ligase, etc.
What is molecular cloning?
In this process, a particular gene of interest or the insert can be introduced into a plasmid vector by producing a cut at both the vector and the gene with the same enzyme thus, producing sticky ends and ligating the two fragmented pieces together to produce a recombinant product.
What is the role of the restriction enzymes in molecular cloning?
The isolated DNA has to be incubated with the specific restriction enzymes under optimal conditions.This helps the restriction enzymes in producing sequence specific cuts at specific restriction sites in the DNA molecules. This catalytic reaction is called restriction digestion.Agarose Gel Electrophoresis helps in analyzing the progression of the restriction digestion reactions.On the other hand, the plasmid vector DNA also has to be processed using similar procedures.What is the role of the DNA ligase enzymes in molecular cloning?
Ligation is the process of fusing the two DNA fragments together with the enzyme, DNA ligase.The interest molecule and the vector are combined to create the final DNA molecule. As a result, the new hybrid DNA molecule is also referred to as a recombinant DNA molecule, and the technique is known as recombinant DNA technology.To know more about Phosphodiester bond, please click here https://brainly.com/question/23660733
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Restriction enzymes are considered as scissors that cleave DNA into fragments at or near specific recognition sites. DNA ligases act as a glue that helps in joining the DNA strands together by catalyzing the formation of a phosphodiester bond.
What are restriction enzymes?
These are protein isolated from bacteria that cleaves DNA sequences at sequence-specific sites, producing DNA fragments with a known sequence at each end. It helps in recombinant DNA technology and genetic engineering.
What are the DNA ligases?
It is a specific type of enzyme that plays a role in, maintaining genomic integrity by repairing single-strand breaks in duplex DNA in living organisms.
In the gene cloning process, Both the plasmid and the DNA sequence of interest are cut with restriction enzymes to generate compatible overhang sticky ends that allow them to bind. The enzyme DNA ligase joins the fragments with matching ends together to form a single, unbroken molecule of DNA. This produces a recombinant plasmid that contains the target gene.
Hence restriction enzymes act as molecular scissors and ligases act as a molecular glue.
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