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zaharov [31]
3 years ago
15

Leucine-enkephalin, a pentapeptide, is a naturally occurring pain reliever found in the brain. How many peptide bonds are there

in leucine-enkephalin
Biology
1 answer:
Ksivusya [100]3 years ago
4 0

Answer: Four

Explanation:

The leucine-enkephalin binds to the opioid receptors they function as important signaling molecules in the brain. There are four peptide bonds present in them. These are endogenous ligands which act as neurotransmitters and they have morphine like activity that is they suppress the brain pain receptors and depress the central nervous system and provide relief in pain.

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Answer:

a.) freshwater plants may be rooted here--- Shore

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c.) limnetic zone--- A region of open water in lakes and ponds.

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e.) extends to edge of the continental shelf--- Neretic Zone

f.) generally low nutrient levels

g.) light penetrates here--- Photic Zone

h.) no photosynthesis occurs here--- Aphotic Zone

i.) benthic zone--- this is purely known as the bottom of the lakes or oceans

6 0
2 years ago
Help me plss!!!! I don’t understand it!
Naily [24]

Answer:

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Explanation:

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4 0
3 years ago
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8 0
2 years ago
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zhenek [66]

Answer:

The correct answer is : decreases

Explanation:

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The melanic or dark color type of the peppered moth was not known before pollution level was low before 1811. Hence the decrease in pollution level in atmosphere will lowers the frequency of the melanic form of peppered moths.

Thus, the correct answer is : decreases.

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