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Luda [366]
3 years ago
7

Which mechanism of cellular transport moves substances against a concentration gradient and requires the use of energy?

Biology
1 answer:
horrorfan [7]3 years ago
4 0
The mechanism is called active transport.
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Once produced, NO can diffuse to neighboring cells. <br><br> a. True<br> b. False
LenKa [72]

Answer: True.

Explanation:

Nitric oxide(N,O) is a signaling molecule produced by NO synthase which is a transmitter in the nervous system. In the central nervous system NO is generated by the activation of glutamate receptor. When it is produced, it diffuses out of the cells and act on neighbouring cells.

5 0
3 years ago
What is DNA polymerase?
Romashka-Z-Leto [24]

Answer:

Not all bats hibernate. Even though bears and bats are the two most well-known hibernators, not all bats spend their winter in caves. Some bat species like the spotted bat survive by migrating in search of food to warmer areas when it gets chilly.

Explanation:

the answer is d

3 0
3 years ago
If a plant cell had a mutation such that the cyclic electron flow is observed at a much higher rate, which photosystem is most l
Ksenya-84 [330]

If a plant cell had a mutation such that the cyclic electron flow is observed at a much higher rate, which photosystem is most likely mutated such that energy is absorbed at a lower rate?

PSI

PSII

Answer:

PSII

Explanation:

Non-cyclic phosphorylation involves both PSI and PSII. The process starts with the splitting of water and excitation of electrons of the reaction center of PSII upon the absorption of solar energy at the wavelength of 680 nm. Any mutation in PSII would not allow the non-cyclic phosphorylation to occur when only cyclic phosphorylation would occur. The process of cyclic phosphorylation includes only PS I. Its reaction center absorbs maximum light at 700 nm and is cycled back while supporting ATP synthesis. Therefore, if a plant performs cyclic phosphorylation at a higher rate and absorbs less energy, this means that mutation was in PSII.

7 0
3 years ago
The divisions of the nervous system that have antagonistic actions, or opposing actions are A) motor and sensory. B) sympathetic
Effectus [21]

Answer:

B) sympathetic and parasympathetic

Explanation:

e autonomic nervous system also called the vegetative nervous system is part of the peripheral nervous system which inervates  smooth muscle and glands. Thus, it directly affects the function of internal organs and  regulates  functions such as the heart rate, digestion, respiratory rate,  urination etc. This nervous system control is  unconscious.

The autonomic nervous system is divided into: the sympathetic nervous system, the parasympathetic nervous system and the enteric nervous system.

Parasympathetic nervous system works when organism is at rest so it is known as system responsible for "rest and digest functions". On the other hand, sympathetic nervous system works at active and stressful situations and it is known as "fight and flight" system.

7 0
4 years ago
A science club has 16 members. How many ways can a president, a vice president, and a treasurer be selected from the members?
boyakko [2]

Answer:

The answer would be D. 3,360

Explanation:

The solution is found by multiplying 16 times 15 times 14. The club has 16 members and after one role (president) is filled, there are 15 left to fill the next (vice). The same goes for the next role (treasurer). So 16 is multiplied with 15, then 14. This is more of a math question that biology btw.

3 0
3 years ago
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