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timofeeve [1]
3 years ago
12

The two ends of a single chromosome are called?

Biology
1 answer:
elena-14-01-66 [18.8K]3 years ago
8 0
The ends of a chromosome are called telomeres. They prevent chromosomes from joining together when they are not supposed to. 
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5 0
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It was proposed that nucleic acids were composed of a single tetramer of four nitrogenous bases linked by a circular, sugar-phos
Artemon [7]
I think the apparent weakness that exists in applying this model of nucleic acid structures are; If it was single tetramer of 4 then it would not be able to have the complexity of the linear sequence, and also it could account for significant quantity if there were enough individual tetramers. 
DNA molecule is a made up of nucleotides bases, that are linked together in long chains. Each nucleotide is made up of a sugar (deoxyribose sugar), a nitrogenous base, and a phosphate group. The nucleotides bases on one strand of the DNA pairs with the nucleotide on the other strand (adenine pairs with Thyamine and guanine with Cytosine). The secondary structure of the polymer is responsible for the shape that the nucleic acid assumes. 
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3 years ago
A cell is treated with a drug that prevents the formation of new lysosomes. The cell continues to transcribe the genes that code
iren2701 [21]

Answer:

Explanation:

The correct answer is D: Golgi apparatus.

In principle, the lysosomes are the responsible for accumulating of hydrolytic enzymes, so if the drug did not prevent the formation of lysosomes, the accumulation of hydrolytic enzymes would be in charge of the lysosomes.

But in the statement it says that the drug with which the cell is being treated prevents the formation of lysosomes, and in this case, the organelle that is most likely to perform the function of accumulating  hydrolytic enzymes is the golgi apparatus.

6 0
4 years ago
Acclimatization (or physiological adaptation)a. occurs at the individual level during childhood. b. occurs at the individual lev
anzhelika [568]

Answer:

b. occurs at the individual level throughout an individual’s lifetime

Explanation:

Adaptation differs from evolution in the sense that, adaptation can occur at different levels and all the time. For example if you take a dog to colder climate it will grow thick fur or if you take it to a hot climate it will lose a little bit of it. Changes during childhood are just part of the development of the body. Changes that occur at a population level via natural selection is evolution is different because adaptation can happen at the organism level but evolution needs be at the population level. If climate change affects an specific habitat animals can adapt to it, but if they develop different traits due to this climate change that would be evolution.

3 0
4 years ago
How long ago did oceans begin to form <br><br> 12.5 MYA<br> 137 MYA<br> 285 MYA<br> 3800 MYA
Marysya12 [62]

The correct answer for above statement is:

<h3>3800 MYA</h3><h3>Explanation:</h3>

he ocean appeared billions of years ago. Over broad periods of time, our rudimentary oceans developed. Water endured a gas until the Earth cooled below 212 degrees Fahrenheit. At this time, about 3.8 billion years ago, the water contracted into rain which stretched the basins that are now our oceans.

3 0
3 years ago
Read 2 more answers
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