Sarah is building a model of a strand of DNA. She should show that the nucleotides are linked by covalent bonds between phosphate and sugar.
DNA typically exists two strands closely bound to one another rather than as a single strand. These two lengthy strands form a double helix when they wind around one another. The nucleotide includes a nucleobase as well as a portion of the molecule's backbone, which holds the chain together. A nucleotide is a base coupled to a sugar and one or more phosphate groups, whereas a nucleoside is a base linked to a sugar and just one or two phosphate groups. Polynucleotides are biopolymers made of several linked nucleotides, such as DNA.
DNA carries the information that make every individual unique.
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A model of a DNA strand is being constructed by Sarah. She has to demonstrate how the covalent connections between phosphate and sugar hold the nucleotides together. The correct option is D.
What is a nucleotide?The non-protein nitrogen portion of milk contains low-molecular-weight molecules called nucleotides that have a nitrogenous base, a sugar moiety, and one to three phosphate groups.
While every RNA nucleotide contains the sugar ribose, a DNA nucleotide contains the sugar deoxyribose.
Adenine, guanine, cytosine, and thymine are examples of nitrogenous bases found in DNA. RNA does not contain thymine; instead, it contains the nitrogenous base uracil.
Sarah is building a model of the DNA strand. She has to show how the nucleotides are held together by the covalent bonds formed between phosphate and sugar.
Thus, the correct option is D.
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Your question seems incomplete, the missing options are:
Two nitrogenous bases
Nitrogenous bases and phosphate
Nitrogenous bases and sugar
Phosphate and sugar
At Weeks Bay there was a population of 200 alligators. In May of 2006 a new species of catfish was released into the Mississippi. These catfish reproduce very fast and soon become a rich food source for the alligator population. This provides the alligators with the energy needed for more successful reproduction. The following summer of 2007, 100 babies were born and a total of 40 gators died that year. However, the next year in early 2008 there was a terrible drought, causing 100 alligators to die.
2. What is the growth rate (r) of the alligator population during 2007?
Answer:
1. 260
2.
3. drought
4. babies born
6. carrying capacity
7. population density
8. logistic growth
9. exponential curve
Explanation:
Question and Answer options in photo.
Zoom in if needed
Help :(
Answer:
I belive that the answer is B
Explanation:
I believe that it's B because if the rabit population continued to grow then it will allow the soil to become more fuirtle because of the dropings that the rabbits leave behind. This would cause more plants and growth in the habitat, which would lead to economic growth
I hope this helps!
which came first the chicken or the egg (this is for a school asignment i promise)
Answer:
fs the chicken
Explanation:
Answer:
two birds that weren't really chickens created a chicken egg, and hence, we have an answer: The egg came first, and then it hatched a chicken.
Explanation:
12
1 point
Which type of cell must contain a mutation in order for the mutation to be passed on to offspring (select 2)?
sperm cell
egg cell
skin cell
nerve cell
brain cell
blood cell
How does energy transfer from the hot water to the cold air
Answer:
humidity and evaporation
Explanation:
As sound waves travel through air, they cause air molecules to do what?
Answer:
To vibrate
Explanation:
When sound waves travel, they need to form vibrations so the air molecules vibrate
Provide an example of how your body could maintain homeostasis in response to detecting that the body temperature was falling below 98.5 degrees.
Answer:
Our body produces heat energy.
Explanation:
When our body temperature decreases than normal range, our body produces heat to maintain internal heat in the normal range. Our internal body temperature is regulated by hypothalamus which is a part of our brain. The hypothalamus regulate the temperature and take actions to maintain it in the normal range of temperature which is about 37°C. If our body temperature is too low, the hypothalamus order to the body to generates heat energy and maintains heat in the normal range. The sweat glands remain inactive in order to prevent heat losses.
A land based global community of organisms is called a?
where can you get information about endangered species?
Answer:
The National Wildlife Federation
Explanation:
I think this is where you can learn about endangered species.
Hope this helps!
What is the primary cause of groundwater shortage?
A)
pollution
B)
use exceeding the rate of replenishment
C)
lack of precipitation
D)
flooding
Answer:
Its B
Explanation:
Edge 2021
Answer:
The correct answer is D. All of the above
Explanation:
E2020!
Which of the following describes the function of genomics and marker-assisted selection?
A. help determine the heritability of a trait and eliminate undesirable traits
B. introduce probiotics and the transfer of microorganisms from other species
C. eliminate undesirable traits and improve desirable traits
D. improve desirable traits and help determine the heritability of a trait
Answer:
D
Explanation:
Improve desirable traits and help determine the heritability of a trait.
HELP! This is a fill in the blank I need a quick answer to.
Cells can make new cells. One cell can (a) ____________ into two new cells. This is called (b)__________________. The process of cell division goes through various states. First, the cell nucleus (c)________________ into two. A new cell surface membrane then (d)____________ the cell divides. The two new cells are called (e)_______________ and they are small. They will grow and become larger. They grow by getting (f)______________ from the food that is eaten. Once they grow to full size they can also (g)_____________. If cells divide more quickly than they should, or divide in the wrong way, (h)_____________ can develop.
Explanation:
A turn
B replicating
C enters
D make
E Big
F fat
which of the following organisms has the simplest cellular structure? a. bacterium b. earthworm c. mushroom d. sunflower
Bacteria will have the simplest cellular structure. So the correct option is A.
What are prokaryotic cells?A cell type without a genuine nucleus or membrane-bound organelles is referred to as prokaryotic. All the other types of life are eukaryotic, whereas organisms in the categories of Bacteria and Archaea are centered on the prokaryotic cell.
Prokaryotic species, on the other hand, are exceedingly prevalent and account for a large portion of the biomass on Earth.
Unicellular organisms are those that have prokaryotic cells. We refer to them as "prokaryotes." A prokaryotic cell may operate as a live creature thanks to a number of factors. Prokaryotes have a cell membrane covering them at first.
With the help of this membrane, they may engineer a particular environment for metabolic processes within the cytosol. Second, these cells contain both ribosomes and free DNA.
Even though ribosomes are organelles, a plasma membrane does not enclose them.
Therefore the correct option is A.
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during what stage do you have sleepwalking and sleep talking?
Sleepwalking occurs all through non-REM (NREM) sleep, normally in level 3 of the sleep cycle, which is likewise called deep sleep. Along with other parasomnias like sleep speakme, confusional arousals, and sleep terrors, sleepwalking is assessed as an NREM sickness of arousal.
The opening in leaves necessary for photosynthesis is call the
Answer:
I kinda think it's stomata
Why was the evolution of cyanobacteria such a significant event in Earth's history
Explanation:
oxygen, a byproduct of that photosynthesis, was released into the atmosphere, changing it in such a way that it may have allowed the evolution of more complex forms of life.
Answer:
Cyanobacteria are blue-green algae that produce chlorophyll and undergo photosynthesis. Oxygen, a byproduct of that photosynthesis, was released into the atmosphere, changing it in such a way that it may have allowed the evolution of more complex forms of life.
Explanation:
Right on ED2021 practice, goodluck!
I REALLY NEED HELP ASAP!!!!!!!
*I attached a picture but heres the question just in case!"
"The diagram below shows the structures of an animal cell. What is structure 3, and how does it help sustain life?"
Answer: I think it’s B but I am not sure sorry dude
Explanation:
What organelle regulates cell contents?
A. Ribosome
B. Vacuole
C. Nucleus
D. Cell Membrane
HELP ME PLEASE
*WILL GIVE BRAINLIEST FOR BEST ANSWER DONT ANSWER IF YOU DONT KNOW AND NO VIRUS LINKS OR I WILL REPORT YOU!!!*
What is one result of meiosis?
A. two diploid cells
B. four diploid cells
C. two haploid cells
D. four haploid cells
Answer:
The final product of Meiosis is haploid daughter cells in which each cell has 23 chromosomes. What happens in meiosis is that, the cell is divided twice and this produces four daughter cells. During this process that our sex cells are produced. So the answer for this would be option D.
Explanation:
Answer:
D
Explanation:
Hope this helps! have a great day.
Also the people who post virus links are bots. They dont understand anything
create a mnemonic for the word CIRCULATORY SYSTEM on how we can take good care of our Circulatory system.
Complete the table below showing the sequences of DNA, mRNA codons, tRNA anticodons and the amino acids. Remember the genetic code is based on mRNA codons. (il give you brain list if you answer all)
Answer:
1. TGG 2.TTC 3.ATA 4. ACC 5. AAG 6. CUA
Explanation:
7. UGG 8. GAU 9. AUA 10. phenylalanine 11. aspartate 12. isoleucine
During translation, tRNA adds the correct amino acid to the growing protein, following the mRNA codon sequence. Tryptophan, Lysine, Leucine, Tyrosine.
What is translation?Translation is the stage in protein synthesis that follows transcription, and occurs in the cytoplasm.
When mRNA leaves the nucleus and moves to the cytoplasm, it meets a free ribosome that is the primary structure for protein synthesis. Ribosomes are composed of two subunits of rRNA associated with different tRNA that carries amino acids.
The ribosome reads mRNA in the 5' to 3' direction, and, according to the codons that are being readen in mRNA, tRNA transfers the correct amino acids to build the polypeptide chain.
Let us remember that the codon is the sequence of three nucleotides present in mRNA. The molecule carriesa a start codon and stop codons.
Each tRNA has two important sites. One of them is the antidocon that couples with the codon of the mRNA molecule. The other site couples with the coded amino acid.
The protein is synthesized from the amino terminus to the carboxy terminus.
In the example,
DNA mRNA tRNA Amino Acid
ACC UGG ACC Tryptophan
TTC AAG UUC Lysine
GAT CUA GAU Leucine
ATA UAU AUA Tyrosine
You can learn more about translation at
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WHAT IS The 2nd phase of mitosis
Answer:
When prophase is complete, the cell enters prometaphase — the second stage of mitosis. During prometaphase, phosphorylation of nuclear lamins by M-CDK causes the nuclear membrane to break down into numerous small vesicles. As a result, the spindle microtubules now have direct access to the genetic material of the cell.
Explanation:
if there is 8 g of a substance before a physical change, how much will there be afferwards
Answer:
The correct answer is 8 g.
Explanation:
During a physical change, the identity of the substance does not change, because no chemical reaction occurs. So, after the change, the amount of substance is still the same. Examples of physical changes are changes in the state of matter (solid-liquid-gas). If 8 grams of ice (water in the solid-state) are melted, after the melting process we will have 8 grams of water in the liquid-state, but still 8 grams of water.
Which statement best explains how respiration and photosynthesis are related to one another?
A Respiration requires water that is given off during photosynthesis.
B. Photosynthesis requires oxygen that is given off during respiration.
C. Photosynthesis gives off carbon dioxide that is required for respiration
D. Respiration gives off carbon dioxide that is required for photosynthesis
Answer: D
Explanation:
photosynthesis - takes in water, energy from the sun, and carbon dioxide and releases oxygen and glucose (sugar)
respiration - takes in glucose and oxygen, and releases water and carbon dioxide and energy
they are basically the opposite
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Which of the following is an example of microevolution?
A. The formation of four new species of fish in a lake over thousands of years
B. A mass extinction that occurs because of major environmental changes in a habitat
C. A change in the frequency of body color in species of beetle over time
D. The formation of two new species of rodent that have been isolated by a mountain range
why should we conserve ecosystem?
Answer:
Healthy ecosystems clean our water, purify our air, maintain our soil, regulate the climate, recycle nutrients and provide us with food.
Make a list of items in a kitchen that come from land resources.
Answer:
water, Wooden supplies, food from farms, and counters made from minerals.
Explanation:
The list of items in a kitchen that come from land resources include the
following:
CabinetsChairsCutlery etc.What are Land resources?These are the resources which are present on land and examples include
wood, minerals etc.
Land resources are usually refined and used in the production of various
types of things as listed above.
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The giant panda has six fingers on its paws instead of five, and its favorite food is
bamboo. How does this adaptation help the panda to survive?
O It allows the panda to digest the bamboo faster.
It allows the panda to reach the taller bamboo stalks.
It helps the panda climb the bamboo stalks more quickly.
It helps the panda hold large bamboo stalks as it feeds.
Answer:
C:It helps the panda climb the bamboo stalks more quickly.
Explanation:
I got it correct on a quiz
Answer: Option (C) is correct
It helps the panda climb the bamboo stalks more quickly.
Explanation: Hope it helps!
Good luck!
After a month of heavy rain, a formerly clear pond on a golf course is covered with slimy green algae. What do you think happened?
How is food digested inside me ?
Answer:
After you swallow, peristalsis pushes the food down your esophagus into your stomach. Stomach. Glands in your stomach lining make stomach acid and enzymes that break down food. Muscles of your stomach mix the food with these digestive juices.