Answer: D
Explanation:
Imagine a bacterial cell with a mutation that renders D N A Pol I completely nonfunctional (note that this would be a lethal mutation). What, precisely, would go wrong with replication in this cell?
a. inability to unwind double helix
b. inability to prime replication
c. inability to extend the length of leading and lagging strands
d. inability to replace primers
Cells are unable to replace primers.
The process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules is known as replication. One of the most fundamental processes that occurs within a cell is DNA replication. Before cells can divide, their DNA must be replicated. This ensures that each daughter cell receives a copy of the genome, resulting in successful genetic trait inheritance. DNA replication is an essential process that is conserved across all organisms.
Primers are short stretches of DNA that target specific sequences and aid in the identification of a specific part of the genome, such as a gene. Primers are typically 18 to 25 nucleotides in length. They can be synthesized in a specialized lab and are used in a variety of applications.
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the process of fat digestion begins even before you take your first bite of food. just the smell of food can begin digestive juices flowing. the most common lipids found in foods are primarily in the form of triglycerides. these lipids are broken down during digestion to yield monoglycerides, glycerol, and free fatty acids. focus your attention on the steps involved in fat digestion illustrated in the focus figure. drag the labels onto the flowchart to indicate the correct sequential order involved in lipid digestion.
Even before you take your first mouthful of food, you are already in the lipid digestion process. Simply smelling food might start the digestion process. Triglycerides are the most prevalent kind of fat present in food.
What takes place first during the digestion of fat?Utilizing salivary enzymes, the body starts to break down fat in the mouth. Foods that have been chewed have more surface area, which helps the digestive enzymes do their job more quickly. Lingual lipase and phospholipids, which break down fats into tiny drops, are the two most significant molecules that aid in fat digestion in the mouth.
What occurs during the digestion of fat?In the stomach, fat is separated from other dietary components. In the small intestine, bile emulsifies fats. Then, enzymes degrade them. The intestinal cells take up the fats. Chylomicrons are substantial lipoprotein structures that transport fats through the lymphatic system. They are made of long-chain fatty acids.
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Modern evidence suggests that Homo sapiens mated with members of this other species of hominin. which is shorter than Homo sapiens, has a larger brain, and originated in Europe a. Australopithecus afarensis b. Pan troglodytes c. Homo erech d. Homo neanderthalensi
Homo neanderthalensis, which evolved in Europe, was shorter than Homo sapiens and had a larger brain.
What existed before to Homosapien?Homo heidelbergensis gave rise to Homo sapiens in Africa. They shared the planet with Neanderthals for a considerable amount of time in Europe and the Middle East, and maybe with Homo erectus in Asia and Homo floresiensis in Indonesia. However, they are now the only living human species.
Which subspecies of humans has the biggest brains?Neanderthal human
The human brain has grown in size over the course of human evolution (see Homininae), from approximately 600 cm3 in Homo habilis to 1680 cm3 in Homo neanderthalensis, the hominid with the largest brain.
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a locus describes: select one: a. a location on a chromosome b. a type of protein c. a type of insect d. none of the above
A locus describes a location on a chromosome.
A locus is the physical site or location of a specific gene on a chromosome.
Locus is a location that tell us where on a chromosome a specific gene is. It is considered as physical location of a gene on a chromosome. It tells about gene and its neighborhood .Hence ,Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.
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which of the following describes the normal function of the p53 gene product?
a. It allows colls to pass on mutations due to DNA damage
b. It inhibits the cell cycle
c. It causes cells to reduce expression of genes involved in DNA repair
d. It slows down the rate of DNA replication by interfering with the binding of DNA polymerase.
b. It inhibits the cell cycle
p53 gene product inhibits the cell cycle for preventing replication of damaged DNA. Main function of p53 gene product are: growth arrest by inhibiting cell cycle, DNA repair and apoptosis (cell death). That means p53 gene product arrest the growth of cell cycle when there is any damaged DNA.
A regulatory protein called p53 that is often mutated in human malignancies is also known as tumor protein P53, cellular tumor antigen p53 (UniProt name), or transformation-related protein 53 (TRP53). The p53 proteins, which were once believed to be a single protein and are sometimes referred to as such, are essential in vertebrates because they inhibit the development of cancer. As a result of its function in preserving stability by guarding against genome mutation, p53 has been referred to as "the guardian of the genome." As a result, the gene TP53[note 1] is categorized as a tumor suppressor.
In 1979, the term "p53" was coined to describe the apparent molecular mass; SDS-PAGE examination reveals that the protein is 53 kilodalton (kDa) in size.
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all of the statements are true except: please choose the correct answer from the following choices, and then select the submit answer button. answer choices breathing is controlled by both voluntary and involuntary mechanisms. stronger or more frequent contraction of respiratory muscles helps to remove excess co2 from the blood. decreasing levels of oxygen in the blood are detected by chemoreceptors in the kidney. chemoreceptors involved in the homeostatic control of breathing are located in the brainstem and the carotid and aortic bodies. as an organism's activity level increases, the level of co2 in the blood will increase and stimulate faster or stronger breathing.
Decreasing levels of oxygen in the blood are detected by chemoreceptors in the kidney.
Chemoreceptors present in carotid bodies and aortic arch detect changes in arterial carbon dioxide, oxygen, and pH.
Carotid bodies are more important in intervene the response and provide the principal mechanism by which mammals identifies lowered levels of oxygen. Chemoreceptors detect the levels of carbon dioxide in the blood by keeping count of hydrogen ions in the blood. The decrease in CO2 leads to a decrease in ventilation. Hence, Less CO2 is retained in the lungs, after then CO2 increases and returns to normal.
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Which way do particles move during active transport? Choose 1 answer: Choose 1 answer: (Choice A) A From one area of high concentration to another area of high concentration (Choice B) B From areas of high concentration to areas of low concentration (Choice C) C From one area of low concentration to another area of low concentration (Choice D) D From areas of low concentration to areas of high concentration
Answer:
(Choice D) D From areas of low concentration to areas of high concentration
Explanation:
It is called active transport because moving molecules from areas of low concentration to areas of high concentration requires energy. Active = takes energy. Molecules moving from a low concentration to a high concentration requires energy. Hope that helps keep it straight.
Chromosome arm exchange during meiosis is precise- if exchange occurs within a gene no bases will be added or lost. How can this happen?.
The exchange within gene while no bases are added and lost will occur through recombination.
How this happen during recombination?Recombination happens when two DNA molecules swap genetic material with one another. Meiosis is one of the most prominent examples of recombination. This is also called as crossing over.
The homologous chromosomes of the cell line up very closely to one another when recombination takes place during meiosis (specifically in prophase I ). Then, in the same place on each chromosome, the DNA strand breaks, producing two free ends. A connection known as a chiasma is formed when either end crosses over onto the opposite chromosome. The crossing-over process finally comes to an end as prophase I ends and metaphase I starts, and then the homologous chromosomes get ready to split.
As a result of recombination, each chromosome carries fresh, distinct allele combinations.
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the indicated organ is the which contains a high concentration of lymphatic nodules that control the bacteria entering the large intestine by immune responses
The mucosa that lines the ileum of the small intestine develops into Peyer's patches, which are collections of lymphatic nodules. They are crucial in protecting the gastrointestinal system from the numerous infections that enter there.
What kind of cell makes up the majority of the lymphatic system?The lymph node's lymphatic endothelial cell region is where macrophages are mainly found. They can be divided into two subpopulations, the subcapsular sinus macrophages (SSM) and the medullary sinus macrophages, depending on where they are in relation to one another along the lymph node lymphatic network.
In the neck, groyne, and armpits, where the major lymphatic vessel junctions are concentrated, they are most frequently found. The capsule and the cortex are the two main compartments that make up each lymph node.
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Select all of the following pieces of evidence Dr. Corbett cites to demonstrate the development and value of the NIH/Moderna vaccine?
neutralizing antibodies were observed even in older adult cohorts
antibodies increase in response to dose in animals and humans
individuals who received the placebo vaccine did not have neutralizing antibodies
a proof of concept mRNA vaccine against a mouse coronavirus was very effective at protecting against a lethal exposure
Neutralizing antibodies had been discovered even in older grownup cohorts.
Antibodies growth in reaction to dose in animals and humans
A proof of idea mRNA vaccine towards a mouse coronavirus changed into very effective at protective towards lethal publicity.
The Moderna vaccine after two doses and a first booster dose has been proven to have very high effectiveness in opposition to extreme disorder, hospitalizations, and demise, and modest effectiveness in opposition to symptomatic contamination.
The records helping the FDA's authorization of an unmarried booster dose of the Moderna COVID-19 Vaccine, Bivalent for each the 6 years via 11 years age organization and 12 thru 17 years age organization is based on the FDA's previous evaluation of immune reaction and safety records from a clinical observe in adults 18 years of age.
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A certain type of bird lives in two regions of a state. The distribution of weight for birds of this type in the northern region is approximately normal with mean 10 ounces and standard deviation 3 ounces. The distribution of weight for birds of this type in the southern region is approximately normal with mean 16 ounces and standard deviation 2. 5 ounces.
The z-scores for a weight of 13 ounces for a bird living in northern region is equal to 1 and southern region is equal to -1.2 and the bird of this type with a weight greater than 13 ounces lives in the southern region.
Z-scores is defined as the numerical measurement of a set of values that establishes the relationship of the value with the mean of the set of values given. The formula for determining the z-scores is expressed as
z = x - μ/σ
where x is the raw value, μ is mean and σ is standard deviation.
For northern region, μ = 10 and σ = 3 and for southern region, μ = 16 and σ = 2.5
The z-score for northern region at x = 13 will be
z = 13 - 10/3
z = 3/3 = 1
The z-score for southern region at x = 13 will be
z = 13 - 16/2.5
z = -1.2
Now, we find the probability.
For the northern region, P(x > 13) = P(z > 1) = 1 - P(z < 1) = 1 - 0.8413 = 15.87%
For the southern region, P(x > 13) = P(z > -1.2) = 1 - P(z < -1.2) = 1 - 0.1314 = 86.86%
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Complete Question:
A certain type of bird lives in two regions of a state. The distribution of weight for birds of this type in the northern region is approximately normal with mean 10 ounces and standard deviation 3 ounces. The distribution of weight for birds of this type in the southern region is approximately normal with mean 16 ounces and standard deviation 2.5 ounces.(a) Calculate the z-scores for a weight of 13 ounces for a bird living in the northern region and for a weight of 13 ounces for a bird living in the southern region.(b) Is it more likely that a bird of this type with a weight greater than 13 ounces lives in the northern region or the southern region? Justify your answer.
What is the complementary 3'-5' strand of DNA if the 5'-3' strand is A T G G T A G C T A A C C T T?
Answer:
T A C C A T C G A T T G G A A
Explanation:
"A" pairs with "T", and "C" pairs with "G".
the movement of glucose from the lumen into the proximal tubule cells is an example of . see section 40.3 (page) . the movement of glucose from the lumen into the proximal tubule cells is an example of . see section 40.3 (page) . primary active transport secondary active transport passive diffusion facilitated diffusion
The movement of glucose from the lumen into the proximal tubule cells is an example of secondary active transport.
Proximal tubule is the first nephron segment after the glomerulus where reabsorption commences. The proximal tubule has the role contributing towards fluid, electrolyte, and nutrient homeostasis. It is also involved in potassium reabsorption.
Secondary active transport is the type of active transport where the movement of a molecule against its concentration gradient is facilitated by the energy released by the downhill movement of another molecule. The movement of the two molecules can be in opposite direction or in the same direction. The example of such a transport is glucose symporter SGLT1.
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a body part that is formed of two or more tpyes of body tissue and performs one or more specific functions is called
Answer: it is called an organ.
Explanation: there are different types of organs in your body some are the skeletal organs and muscular organs and so many other organs. it can provide support for your body, creates limitless movement, controls blood movement and digestive system.
immediately after digestion, nutrients delivered from the intestines into the circulatory system are:
Answer:
transported through the blood to the liver for chemical alternations to make them better suited for use by the tissues.
Explanation:
A nurse is providing teaching to the mother of an infant who has a prescription for digoxin. Which of the following instructions should the nurse include?
A. "Do not offer your baby fluids after giving the medication."
B. "Digoxin increases your baby's heart rate."
C."Give the correct dose of medication at regularly scheduled times."
D."If your baby vomits a dose, you should repeat the dose to ensure that he gets the correct amount."
C."Give the correct dose of medication at regularly scheduled times."
Digoxin is used to treat irregular cardiac rhythms and heart failure (arrhythmias). It improves heart performance and aids in maintaining heart rate management.
Digoxin is available as a tablet, capsule, or liquid for children to ingest. Ordinarily, digoxin is taken once day. A carefully marked dropper is included in the pediatric elixir for gauging the dosage. Your dosage would need to be adjusted because different brands of digoxin contain varied quantities of the active ingredient.
Digoxin aids in managing your disease but cannot reverse it.
Digoxin may also be administered following a heart attack to treat angina, which is a type of heart pain.
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The diagram represents a dihybrid cross between two pea plants that are heterozygous for both seed color and seed shape.
What is the phenotypic ratio of the offspring?
- 1:1:1:1:2:2:2:2:4
-1:3:3:9
-1:4
-4:12
Answer:4:12
Explanation:
This question already provides you with the punnet square, genotypes resulting from the cross, and phenotypes resulting from the cross. Simply count the number of green phenotypes (the green circles), and compare them to the number of yellow phenotypes (yellow circles), and you get 4 green for every 12 yellow.
please help me again i’m even more confused
Answer:
The impact of the codon changing to A has a missense mutation on the protein. The original amino acid was Histidine and mutated into Leucine.
Explanation:
*If you do not know how to use a codon chart you can ask me, just comment it.*
ok, let's first see what a missense mutation actually is.
missense mutation - A changed DNA sequence that changes a amino acid completely from the original amino acid.
The original strand you have to convert it, CTC is CAC that is how it originally is Histidine, the mutated DNA strand is CAC, but converted is CUC which is Leucine.
Hope that helped, if not, I can go in depth. :)
and like someone gets cancer from UV rays, can it be passed down to their children
Answer:
No, but could depend
Explanation:
Some types of skin cancer are hereditary, and being prone to getting cancer from UV lights can be passed down to an offspring.
What body structure/region normally encounters both inhaled air as well as ingested food and drink?.
Answer: the oropharynx.
Explanation:
Why is the meaning of trait-level comparisons between cultures not always clear?.
The meaning of trait-level comparisons between cultures not always clear because it may not be true that the same traits can be used to meaningfully describe people from different cultures.
What is culture?Culture is described as an umbrella term which encompasses the social behavior, institutions, and norms found in human societies, as well as the knowledge, beliefs, arts, laws, customs, capabilities, and habits of the individuals in these groups.
Culture is known to have five basic characteristics which is highlighted below
It is learned, It can be shared,Culture can be based on symbols, Culture can be integrated, and It is no doubt that Culture is dynamic.A cultural trait can be described as a cultural element, whether physical or not, that has been created by a specific culture and then transmitted to people in it by some form of communication. These cultural traits exist as part of a larger system of culture.
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Which kind of rock is formed when lava leaves a volcano and cools?
A. sedimentary
sedimentary
B. igneous
igneous
C. conglomerate
conglomerate
D. metamorphic
metamorphic
Answer:
B
Explanation:
Kinda already explained, but when the molten lava solidifys it turns into igneous rock.
It isn't sedimentary because those are formed by depositions
It isn't metamorphic because those are formed by heat and pressure. (I can see how this could be confusing) but metamorphic rocks really just means that it's changing it's form. before the pressure and heat, it could of already been a sedimentary rock and changed.
it isn't conglomerate rock because those are just pebbles cemented together plus it's a type of sedimentary rock.
How is Mitosis different from binary fission?
What would happen if a cell transcribed and translated a gene’s intron by mistake?(1 point).
Answer: If a cell transcribed and translated a gene's intron by mistake, then additional amino acids would be inserted into the protein
Explanation:
the gram stain of the csf from a patient suffering from headaches, stiff neck, and petechial rash reveals the presence of gram-negative diplococci. a follow-up capsule stain was also positive for the presence of capsules. with which organism is the patient likely infected?
Neisseria meningitis is the patient likely infected with.
Meningococcal disease is caused by the bacterium Neisseria meningitidis. One in every ten people has these bacteria in the back of their nose and throat without knowing it. This is referred to as being a 'carrier.' Meningococcal disease is caused when bacteria invade the body and cause certain illnesses.
Neisseria meningitidis, also known as meningococcus, is a Gram-negative bacterium that can cause meningitis and other types of meningococcal disease, including meningococcemia, a potentially fatal sepsis.
Cerebrospinal fluid is a clear, colorless bodily fluid found within the tissue that surrounds all vertebrates' brain and spinal cord. CSF is produced in the choroid plexus of the ventricles of the brain by specialized ependymal cells and absorbed in the arachnoid granulations.
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9) attached earlobes are recessive to free earlobes. what is the probability of having a child with attached earlobes when an individual with attached earlobes mates with an individual heterozygous for free earlobes?
50% is the probability of having a child with attached earlobes when an individual with attached earlobes mates with an individual heterozygous for free earlobes.
What ias free earlobes?Earlobes can be categorized as "attached" or "free." Free earlobes droop downward below the point at which attached earlobes are joined to the head.In the population under study, arched earlobes were observed in both sexes in 67.8% of males and females for the left ear and in 74.4% and 72.4% of males and females for the right ear.Earlobes that hang freely is an autosomal dominant feature. This graph illustrates the feature and how it was passed down over three generations in a family. People with the recessive variant of the trait are shown by shading.
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Define oligopotent, multipotent, totipotent, and pluripotent cells are
how are photosynthesis and respiration related to each other?
Answer:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.
Answer:
photosynthesis converts cabon dioxide and water into oxygen and glucose
while respiration converts glucose and oxygen into water and carbon dioxide
Dna replication proceeds outward from two , which are the sites where the template strands are unwound and new dna is synthesized.
Forks are the locations where the templates strands be unwound and fresh dna is created during replication.
How is something synthesized?Simply put, synthesizing is mixing. You combine the ideas and facts of various sources to make a larger statement rather than summarizing the key points of every source individually. This essentially entails comparing and contrasting the information from your sources.
What does writing synthesis mean?Synthesis is the process of combining different elements to create a whole. When instructing students to produce a research study or any work that calls for the utilization of numerous sources, writing instructors frequently use this term.
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the protein hemoglobin carries oxygen from the lungs to the tissues. this is an example of protein's role in
Red blood cells contain a protein called hemoglobin. An illustration of red blood cells showing the hemoglobin protein. This protein serves as a transporter of oxygen from the lungs to tissues.
What are proteins?The term "protein" refers to a macro- and large-scale biomolecule that has one or more lengthy chains of amino acid residues. An amino acid chain makes up the basic building block of proteins.
When oxygen binds to the heme portion of the hemoglobin molecule in red blood cells during physiological respiration, oxyhemoglobin is created. This procedure takes place in the pulmonary capillaries close to the lung's alveoli.
Thus, red blood cells contain a protein called hemoglobin. An illustration of red blood cells showing the hemoglobin protein. This protein serves as a transporter of oxygen from the lungs to tissues.
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