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2 years ago

Which of the following best describes what happens to an enzyme after it catalyzes a chemical reaction?

Biology

2 answers:

solmaris [256]2 years ago

7 0

Answer:

The correct answer is option B. "It is unchanged and can be used again for the same chemical reaction".

Explanation:

One characteristic of enzymes is that they are reusable. Enzymes are not reactants and are not used in the reaction that they catalyze. Once the enzyme catalyzes a chemical reaction, it remains unchanged and can be used again for the same chemical reaction. Usually, one enzyme can bind onto several substrate molecules and catalyze the same reaction multiple times.

S_A_V [24]2 years ago

5 0

B. Catalysts are not changed during a chemical reaction.

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Select the word that best fits the definition: The way goods and services are produced, distributed, and consumed in a society.

Harman [31]

The answer is C. economy

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ANTONII [103]

Answer:

when G1/S cyclin-CDK is activated. Expression of G1/S cyclins is regulated by E2F proteins

Explanation:

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3 years ago

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I am trying to determine reactants going into the electron transport chain. Is this right?

irina1246 [14]

Answer:

Yes, this is correct.

Explanation:

In each glycolytic pathway, glyceraldehyde 3-phosphate dehydrogenase produces 1 molecules of NADH as a result of reduction of NAD+.
Pyruvate dehydrogenase converts pyruvate to Acetyl CoA producing 1 molecule of NADH per pyruvate oxidized.
In Kreb's cycle, isocitrate dehydrogenase, alpha-ketoglutarate dehydrogenase, and malate dehydrogenase reactions produce 1 molecule of NADH each. Furthermore, succinate dehydrogenase reaction produces a single molecule of FADH2 per FAD reduced.
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2 years ago

Why does geographic isolation cause speciation?

zimovet [89]

Answer:

A. It allows two populations to evolve separately.

Explanation:

Geographic isolation is theorized to have catalyzed the formation of new species. Let’s say groups A and B of a bird species get separated by something, and they can’t cross between to interbreed or exchange alleles.

We describe this as no gene flow, which is the opposite of choices C and D. Because of this, they may diverge if given enough time due to the difference in environmental pressures, because they’re now in different environments.

B is incorrect because it doesn’t apply.

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