In order to function properly, cells must perform many reactions. metabolism is the sum of all the chemical reactions in an organism. during metabolism, atp
i. is broken down to fuel chemical reactions.
ii. is created by chemical reactions.
iii. is shuttled from one cell to another.
a. i, ii, and iii
b. i and ii only
c. i and iii only
d. iii only

B. I and II only

Explanation:

Metabolism includes catabolism and anabolism. Catabolism is the breakdown of complex substances into simpler ones. Catabolic reactions release energy which is used to phosphorylate ADP into ATP. Therefore, the exergonic catabolic pathways are mostly accompanied by ATP synthesis. On the other hand, the endergonic anabolic reactions consume ATP. ATP hydrolysis release energy and the energy drives the anabolic reactions. So, metabolism includes synthesis of ATP during exergonic reactions and breakdown of ATP during endergonic reactions.

For example, the reactions of cellular respiration form ATP while dark reactions of photosynthesis consume ATP to form glucose.

I and II only

Explanation: Because it is right

It was tested on a test 100% right

the man is bald so he has no hair to get wet

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

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