Enzyme

Enzyme

University

12 Qs

quiz-placeholder

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Enzyme

Enzyme

Assessment

Quiz

Biology

University

Hard

Created by

Anh Nguyen Le My

Used 36+ times

FREE Resource

12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Are most chemical reactions in living cells at equilibrium?

Yes

No

only the exergonic reactions

all reactions except those powered by ATP hydrolysis

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as is to .


exergonic; spontaneous

exergonic; endergonic

free energy; entropy

work; energy

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A reaction has a ∆G of –5.6 kcal/mol. Which of the following would most likely be true?

The reaction could be coupled to power an endergonic reaction with a ∆G of +8.8 kcal/mol

The reaction is nonspontaneous.

To take place, the reaction would need to couple to ATP hydrolysis.

The reaction would result in products with a greater free-energy content than in the initial reactants

The reaction would proceed by itself but might be very slow

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The oxidation of glucose to CO2 and H2O is highly exergonic: ∆G = –636 kcal/mole. This is spontaneous, but why is it very slow?

Few glucose and oxygen molecules have the activation energy at room temperature.

There is too much CO2 in the air.

CO2 has higher energy than glucose.

The formation of six CO2 molecules from one glucose molecule decreases entropy.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A friend is designing an industrial process around an endergonic biological reaction. You recommend finding a way to provide

ATP

minerals

a lower pH

a plasma membrane

mitochondria

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following statements about enzymes is incorrect?

Enzymes can be used to accelerate both anabolic and catabolic reactions

An enzyme lowers the activation energy of a chemical reaction

An enzyme is very specific in terms of the substrate to which it binds

An enzyme is consumed during the reaction it catalyzes

Most enzymes are proteins

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When a substrate molecule binds to an enzyme, it binds to a particular location known as the …………

active site

regulatory site

allosteric site

binding site

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