why does the presence of telomeres protect the ends of linear chromosomes?

Answers

Answer 1

To prevent the loss of genes as chromosome ends wear down, the tips of eukaryotic chromosomes have specialized DNA “caps” called telomeres. Telomeres need to be protected from a cell's DNA repair systems because they have single-stranded overhangs, which "look like" damaged DNA. ...


Related Questions

which is not true about a wave in open
Ocen?
A. the wave form noves forward, but
the water particles do not advance appreciably
B. As the wave travles, water particles pass
the energy asong by moving in a circle.
C. water particles move in a circular Path
D. water particles travel with the wave

Answers

d because the water particals travel w the waves

Answer:

D. water particles travel with the wave

Explanation:

The water particles travel with the wave is false about a wave in open Ocean. It gets scattered when passing through it.

PLEASE HELP ME IM TIMED!

Answers

Answer:

pretty sure that is the mitochondria, the powerhouse of the cell.

Explanation:

This says it's produces energy through cellular respiration.

The daughter of a couple is colorblind. Her mother has normal vision. B - Normal; b- colorblind. The genotype of the mother is ______.

Answers

Answer: Bb

Explanation: is the mom has B shes going to need to be able to cancel it out

What is a muscle group that performs opposite functions called?

Answers

Answer:

b. Antagonistic muscles

Explanation: is correct

The plasma state occurs when _____.
o Solids are frozen
o gases are heated
o liquids are boiled
o solids are melted

Answers

Answer:

B. Gases are heated

Explanation:

Answer:

solids are melted

Explanation:

pls brainliestt

how does carbon and nitrogen contribute to global warming?

Answers

Explanation:

Lower nitrogen levels in soil promote release of carbon dioxide from soils under high levels of atmospheric carbon dioxide, and could therefore contribute to furthering rising atmospheric greenhouse gases and climate change

The loyality and humbleness that one shows in all activities is called A.freedom B.cooperation C.openess D respect​

Answers

Answer:

D

Explanation:

basta yan yung alam Kung sagot

For the following DNA segment, please make the RNA segment that matches it.
ATT CGA AAG

Answers

Answer: DNA sequence: C C A C T C T T A C T T

mRNA sequence: G G U-G A G-A A U- G A A

Amino acid: GLY-GLU-ASN-GLU

Letter symbol: GENE

Explanation:

Whats up

What is the name given to the network of smaller blood vessels providing nutrition to the walls of large blood vessels

Answers

Answer:

capillaries

Explanation:

What is the term describing the process that occurs when a species evolves into a new species without a physical barrier separating populations?

Answers

Answer:

Sympatric speciation should be correct.

Explanation:

Hope this helps.

Evolution represents biological change that accumulates over time. However, this change is not always apparent at every level in the biological hierarchy. Scientists most commonly observe the effects of evolution at the ________ level.

Answers

Answer:

population level

Explanation:

it ocurrs at the population level as scientists requires genetic variation between individuals of a population for natural selection

since the parasympathetic division causes the heart rate to ____________ and the sympathetic division causes the heart rate to ____________ , this is an example of antagonistic innervation.

Answers

Answer:

since the parasympathetic divison causes the heart rate to decrease and the sympathetic divison causes the heart rate to increase this is an example of antagonistic innervation

Explanation:

in aerobic respiration, what is the ultimate fate of the electrons released from the breakdown of glucose?

Answers

Answer:

They are combined with oxygen and hydrogen ions to form water.

Explanation:

The electron released from the breakdown of glucose transfers in the electron transport chain and is used in the formation of a proton gradient across the membrane.

What is aerobic respiration?

In the presence of oxygen gas, cells undergo cellular respiration, which is how energy from food is produced. The majority of plants, animals, birds, humans, and other mammals all engage in this sort of respiration regularly. As byproducts of this process, water and carbon dioxide are created.

The energy that was stored in carbohydrates and lipids during photosynthesis is released during the process of aerobic respiration and made available to living things. Glycolysis, the link reaction, the Krebs cycle, and oxidative phosphorylation are the four phases.

Protons are pushed out of the matrix and into the intermembrane space as a result of the electrons moving through the electron transport chain. The electrons eventually reach oxygen, which reacts with protons to create water.

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Cell process and transport toturial

Answers

Sorry Brainly can not provide this answer

A site at the 5' end of a gene where RNA polymerase attaches to initiate transcription and control of gene expression occurs is called a/an

Answers

Answer:

A site at the 5′ end of a gene where RNA polymerase attaches to initiate transcription and control of gene expression occurs is called a/an

Explanation:

Energy from the sun , carbon dioxide from the atmosphere and water absorbed by the roots react to produce?

Answers

Answer:

What's your question?

Maybe Your talking about Photosynthesis

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.

This is photosynthesis so energy from sunlight, Co2 and water creates oxygen and energy in the form of sugar

Donde termina el impulso nervioso y que accion origina?

Por favor necesito ayuda con esto, yo ya respondí la parte de donde termina pero donde de verdad necesito ayuda es en la acción que origina, y gracias de antemano.

Answers

Answer:

Un impulso nervioso comienza cuando una neurona recibe un estímulo químico. El impulso nervioso viaja a través de la membrana del axón como un potencial de acción eléctrico hasta el terminal de axón. El terminal de axón libera neurotransmisores que llevan el impulso nervioso a la siguiente célula

Explanation:

please Mark my answer in brainlist

which solution is hypertonic
both
neither
the inside of the cell
the beaker​

Answers

Answer:

the beaker

Explanation:

pls mark me as the brainiest

BRAINLIEST TO CORRECT ANSWER​

Answers

I’d say the answers B

Answer:

C (pictures a and b)

Explanation:

An element contains only 1 type of atom.

PLEASE HELP ME IM TIMED!

Answers

Answer:

Prokaryotic and anaerobic

Hope this helped

Mr. Allen wanted to fill balloons for a party. He rented a helium tank that contained 0.4 cubic meters of helium gas. He was concerned that the gas would not fill many balloons, but it filled 27 large balloons! Why was the small tank of helium gas able to fill so many balloons?

A. Helium mixed with air when it came out of the tank.
B. The helium expanded to fill its new containers, the balloons.
C. Helium molecules are very small in size.
D. The volume of gas in the balloons equaled the volume of gas in the tank.

Answers

Given what we know about the behavior of gases like helium, we can confirm that the small tank of helium was able to fill so many balloons because the helium expanded to fill its new container, which is the balloon.

Helium is a chemical element known as a noble gas. Like all other elements in a gaseous state, the atoms that comprise helium are spaced apart. This allows the gas to be compressed, a property that manufacturers of the gas take advantage of since they can compress a large amount of gas into a small container.

This is precisely what is happening in the question. The small tank of helium, despite being small in size, contains a large amount of compressed helium gas. Therefore, once it is released from the container, the gas expands to fill its new container, which in this case is the balloons, because of this, a relatively small tank of helium was able to fill many large balloons.

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A network of small arteries called the ___________ provides a blood supply to the tunica externa of very large vessels.

Answers

Answer:

vasa vasorum.

Explanation:

The use of restriction enzymes and electrophoresis to generate a map of the DNA molecule is known as

Answers

The use of restriction enzymes and electrophoresis to generate a map of the DNA molecule is known as RESTRICTION MAPPING. This technique is used to map an unknown fragment of DNA.

Restriction enzymes are enzymes that cut a DNA fragment at specific nucleotides sites, thereby generally smaller fragments of DNA.

Restriction mapping is a strategy used to map unknown fragments of DNA by digesting them into smaller fragments and then identifying the specific sites of the DNA breakpoints.

Restriction mapping can then be used to create a diagram of fragments of DNA marked with specific sites where they are cut by specific restriction enzymes.

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what is the difference between ribose and deoxyribose

Answers

Answer: Ribose is a pentose sugar and is found in DNA. Ribose binds a phosphate at the 3′ position

Ribose is a 5-carbon simple sugar. The chemical formula of this sugar molecule is H−(C=O)−(CHOH)4−H. This is the prime component of ribonucleic acid strands. It forms ribonucleotides.


Deoxyribose is a hexose sugar and is found in RNA. Deoxyribose binds a phosphate at the 2′ position. deoxyribose has one less oxygen molecule than ribose.

Deoxyribose, on the other hand, is a monosaccharide too. It also has the same 5-carbon formula as that of ribose sugar but loses an oxygen atom. Its chemical formula is H−(C=O)−(CH2)−(CHOH)3−H

what is true of a fossil that is classified as a transitional form?

Answers

Given our understanding of the situation, we can confirm that a fossil classified as a transitional form, will show characteristics both of its ancestors and of the descendants that derived from it.

Transitional fossils are just that, fossilized remains of a transitional phase of evolution. What this means is that as species evolve, there will always be a point in time where a species is at a halfway point in between the species from which it comes, and the species that it will become.

These fossils, due to being a halfway point, will have characteristics that belong to their ancestors, but also characteristics that belong to their descendants, which is only logical considering that evolution is a process that spans many generations, not something instant.

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look at the picture below. what word describes what is happening to the nutrients and water in the biome?

Answers

Given what we know about the water cycle we can confirm that the process that happening in the biome is the process of condensation

Although the water cycle can be divided and subdivided into various processes, we can simplify it into four simple steps:

EvaporationCondensationPrecipitation Collection

The one saw in the biome and one of the most essential parts of the cycle is condensation. It is the collection of water molecules into a single group that, when dense enough, fall back onto the earth as rainfall. In nature these take the form of clouds, meanwhile, in the biome, they appear as water on the sides of the container.

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Answer:

recyled

Explanation:

What is the term used to describe homologous chromosomes exchanging genetic material during meiosis?.

Answers

The term used to describe homologous chromosomes exchanging genetic material during meiosis is called crossing over.

CROSSING OVER:

Crossing over is the process whereby non-sister chromatids of homologous chromosomes (similar but non-identical chromosomes from each parent) exchange genetic material.

Crossing over occurs in the prophase I stage of meiosis where homologous chromosomes lie side by side to form a structure called tetrad or bivalent.

Crossing over ensures genetic diversity in the offsprings produced meiosis.

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Answer:

crossing-over

Explanation:

Suppose white and brown fur in a species of rodent were due to different alleles at the same gene. An F1 cross between true breeding brown and white lines is set up. What evidence would best support white fur being dominant to brown

Answers

An F1 cross between true breeding brown and white lines is set up. What evidence would best support white fur being dominant to brown -----

The best evidence to show that white fur being dominant is when all the offspring after the cross are white instead of brown

They are therefore expected to produce heterozygous lines.

The evidence that would best support white fur being dominant is when all the lines produced are white despite being heterozygous.

A dominant trait is known to mask the expression of other traits.

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visceral reflex arcs differ from somatic in that ________.

Answers

Explanation:

somatic reflex occurs in skeletal muscles whereas, the visceral reflex occurs in soft tissue organs.

The difference between visceral reflex arcs and somatic reflex arcs is that visceral turns require two motor neurons.

What are visceral reflex arcs?

For instance, somatic reflexes require a direct link between the skeletal muscle and the ventral horn of the spinal cord. The central neuron of a visceral reflex sends a signal to a ganglion, which then sends another signal to the target effector.

While somatic reflexes are aware, visceral reflexes are unconscious. Compared to somatic reflexes, visceral reflexes entail a somewhat slower reaction time.

Visceral reflex arcs use two motor neurons along with glandular tissue and non-skeletal muscle to carry out a reflexive reaction. Skeletal muscles only have one motor neuron, therefore somatic reflex arcs include them.

Therefore, two motor neurons are involved in visceral arcs, which differ from somatic.

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How much work does an elephant do while moving a 50 N circus wagon 20 m?​

Answers

Answer:

The elephant did 4000 N·m or 4000 J or 4 kJ of work

Explanation:

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