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lys-0071 [83]
3 years ago
8

Two scientists observe sparrows singing in the wild. Based on the investigation, scientist A says that the sorrows sing to keep

other birds away from their home. Scientist B, on the other hand, says that the sorrows sing to attract a mate.
Biology
1 answer:
Sergeu [11.5K]3 years ago
6 0
What’s the question?
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The nucleoside analogue acyclovir, which is used to treat herpes simplex virus (HSV) infections, lacks a 3′ hydroxyl group (–OH)
Dima020 [189]

Answer:

There won't be any functional viral DNA synthesis

Explanation:

First of all, you must consider that the HSV has a double-stranded, linear DNA genome. Furthermore, the DNA skeleton is made of the 5'-3' phosphodiester bond. In other words, the 5-phosphat of a nucleotide will bond the 3' OH of the Deoxyribose (see image).

Therefore, if you add a molecule which lacks the 3' OH, such as acyclovir, and has a similar chemical structure to a regular nucleotide, the DNA polimerase will be able to add acyclovir to the main backbone of the viral genome. All in all, you'd be ''cheating'' the DNA pol.

Hence, wherever acyclovir was integrated, there won't be any chance to form a 5'-3' phosphodiester bond. The protomolecule will not be stable and will soon be degradated.

6 0
4 years ago
Where do sensory nerve cells, parasympathetic ganglia, and symphathetic postganglionic fibers found?
svp [43]

Answer:

These are found in the <em>submucosal</em><em> </em><em>plexus</em>

Explanation:

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3 0
3 years ago
Distinguish between breathing and respiration.​
Roman55 [17]

As stated above, breathing is the biological process of inhaling and exhaling of the gases between the cells and the environment. The mechanism of breathing involves various respiratory structures such as the windpipe, lungs and nose. Respiration, on the other hand, is a chemical process that takes place in the cell.

8 0
3 years ago
Read 2 more answers
On the average, most mammals are about: A. 90 B. 50 C. 40 D. 70, percent water
andrew11 [14]
D.) 70% mammals are 70 percent water
7 0
4 years ago
3. What are some examples of fluctuations in abiotic cycles?​
ipn [44]

Answer:

1.The carbon cycle.

2.The nitrogen cycle.

3.The water cycle.

4.The sulfur cycle.

5.The phosphorus cycle.

6.The rock cycle.

Explanation:

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4 0
3 years ago
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