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ahrayia [7]
3 years ago
5

1. How does base pairing differ in RNA, compared to DNA?

Biology
1 answer:
Setler79 [48]3 years ago
8 0

Answer:

A. A pairs with U

Explanation:

In DNA, the nitrogenous bases are A, T, G, and C. In RNA, the nitrogenous bases are A, U, G, and C.

A pairs with U in RNA because it requires less energy to use uracil over thymine.

Hope that helps.

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3 years ago
Heterocysts A. are found in nitrogen-fixing cyanobacteria.B. are used to protect nitrogenase.C. produce catalase.D. generate oxy
BARSIC [14]

Answer:

E. are found in nitrogen-fixing cyanobacteria AND are used to protect nitrogenase.

Explanation:

Heterocysts are specialized cellular compartments found in nitrogen fixing cyanobacteria. They provide the ideal anaerobic environment for nitrogen fixation since nitrogenase enzyme cant work in presence of oxygen. Hence, in a cyanobacteria both the oxygen requiring photosynthesis process and the  oxygen sensitive nitrogen fixation process takes place simultaneously.

Heterocysts have an additional cell wall made of glycolipid that provides a hydrophobic barrier to oxygen. They are involved in production of nitrogenase and other proteins that are required for nitrogen fixation. They also degrade photosystem II which is responsible for producing oxygen and produce proteins which remove any remaining oxygen.

7 0
3 years ago
Compared to freshwater fishes, marine fishes: drink seawater and produce a large volume of urine. do not drink seawater in an ef
Andre45 [30]

Answer:

The correct answer is - tend to lose water by osmosis since their internal salt concentration is lower than that of seawater.

Explanation:

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In contrast, the marine fishes have a lower salt concentration in their body than surrounding water of sea or ocean and they lose water continuously and to compensate for this they need to drink water regularly.

6 0
3 years ago
7._________________________ lines your digestive tract and blood vessels. It moves food and blood through your body.
gizmo_the_mogwai [7]

Answer:

Smooth Muscle

Explanation:

In the digestive tract it's called the muscularis mucosa.

3 0
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In a study of adolescent agreement and disagreement with policies to remedy racial discrimination, most adolescents believed tha
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Answer:

16 and 17

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4 0
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