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Ganezh [65]
3 years ago
12

2. What is an enzyme, and what is its role in a reaction?

Biology
2 answers:
vovikov84 [41]3 years ago
6 0

Answer:

Contractile

Explanation:

Ivanshal [37]3 years ago
4 0

An enzyme is a protein catalyst that lowers the activation energy required to undergo a chemical reaction, which speeds up the rate of reaction.

A prokaryotic cell does not contain a nucleus, while a eukaryotic cell does contain a nucleus.

In eukaryotic cells, a nucleus holds the cell's DNA. Ribosomes is the site of protein synthesis. Cell membrane acts as a layer of protection for the organelles. The cytoplasm holds the cell's shape and suspends the organelles within the cell.

Plant cells contain chloroplast, chlorophyll, and a cell wall. Animal cells contain centrioles.


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Grizzly bears once lived across much of western North America until European settlements and aggressive hunting eliminated most of the population.

PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK

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