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olga nikolaevna [1]
3 years ago
5

Why are telomeres a necessary component of linear chromosomes? they maintain the length of a chromosome because dna is shortened

every time it is replicated. they direct where dna synthesis will end. none of the answer options is correct. they fix mistakes that are made during dna replication. they direct where dna synthesis will begin?
Biology
1 answer:
Setler79 [48]3 years ago
8 0

Telomeres are found at the end of chromosomes to protect genes from reduction during replication of chromosomes, especially during meiosis or mitosis. They are composed of repetitive sequences that do not code for protein. Telomeres become reducted <span>especially  due</span> to the inability of the lagging strand to be completely replicated to the end of the chromosome. However, while the telomeres become shorted with every replication, the telomeres are usually slightly elongated by telomerase reverse transcriptase. 





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Tail length in mice varies within a population. Scientists observed change in the distribution of tail lengths in a mouse popula
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Answer:

Not passed along or it is recessive

Explanation:

There are two reasons for the shift in tail length in mice. The first reason could be that the tail length of mice is a recessive trait. In a population where there are also dominant traits, these traits may not show but still be in the population via the heterozygous individuals. The second reason that there may be fewer mice with short tails is that this phenotype causes some survival incompatibility that they may not survive to reproductive years or are not chosen by other mice to cross with. The short tail then does not get passes on.

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3 years ago
“Fill in the diagram below to compare and contrast photosynthesis and cellular respiration. In the center is the products and re
ValentinkaMS [17]

The processes and their reactions are discussed below.

<h3><u>Explanation</u>:</h3>

<u>Carbon dioxide</u>:

In case of plants the carbon dioxide is needed to produce glucose in the process of photosynthesis. This step is very crucial for the survival of each and every organisms in the living world. The energy for this process of photosynthesis is found from sun's rays.

In case of humans, carbon dioxide is produced through respiration. This produces energy that helps the organism to sustain living.

Oxygen:

It is produced by plants from photosynthesis through splitting of water. The energy for this process comes from Sun's energy.

In case of animals, the oxygen is needed  for respiration. This is required to accept the electron in the last step of aerobic respiration. This produces the energy that helps to sustain the living.

Water:

Both plants and animals require the water for performing their metabolic works. The water is obtained by plants from soil through roots and conducted to leaves by vascular tissues xylem. Similarly the animals obtain water from drinking. They need the water to perform digestion, and each and every metabolic process.

Glucose:

Glucose is produced by plants from photosynthesis. It is produced absorbing the energy of Sun's rays.

In case of animals, the animals obtain glucose from food and they digest the glucose through respiration and produce energy that helps them to sustain life.

5 0
3 years ago
What is the term for evaluation of work by others in the same field?
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Answer:

a

Explanation:

7 0
3 years ago
Mixing all of the wavelengths of _____ together creates white light.
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4 0
2 years ago
WORTH 78 POINTS!!!!WILL MARK BRAINLIEST !!explain fully the staged involved in aerobic respiration. Include the journey of the r
VladimirAG [237]

Aerobic respiration is a biological process that takes energy from glucose and other organic compounds to create a molecule called Adenosine TriPhosphate (ATP). ATP is then used as energy by nearly every cell in the body -- the largest user being the muscular system. Aerobic respiration has four stages: Glycolysis, formation of acetyl coenzyme A, the citric acid cycle, and the electron transport chain.

The first step of aerobic respiration is glycolysis. This step takes place within the cytosol of the cell, and is actually anaerobic, meaning it does not need oxygen. During glycolysis, which means breakdown of glucose, glucose is separated into two ATP and two NADH molecules, which are used later in the process of aerobic respiration.

The next step in aerobic respiration is the formation of acetyl coenzyme A. In this step, pyruvate is brought into the mitochondria to be oxidized, creating a 2-carbonacetyl group. This 2-carbon acetyl group then binds with coenzyme A, forming acetyl coenzyme A. The acetyl coenzyme A is then brought back into the mitochondria for use in the next step.

The third step of aerobic respiration is called the citric acid cycle -- it is also called the Krebs cycle. Here, oxaloacetate combines with the acetyl coenzyme A, creating citric acid -- the name of the cycle. Two turns of the citric acid cycle are required to break down the original acetyl coenzyme A from the single glucose molecule. These two cycles create an additional two ATP molecules, as well as six NADH and two FADH molecules.

The final step in aerobic respiration is the electron transport chain. In this phase, the NADH and FADH donate their electrons to make large amounts of ATP. One molecule of glucose creates a total of 34 ATP molecules.

Hope this helps!

5 0
3 years ago
Read 2 more answers
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