General Bio Exam 2

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1

Catabolism is to anabolism as ________is to __________

  1. exergonic, spontaneous
  2. work, energy
  3. exergonic, endergonic

c. exergonic, endergonic

2

Are the chemicals reactions in equilibrium within living cells?

  1. Yes
  2. No
  3. All reactions except that powered by ATP

b. No

3

Which of the following is a statement of the first law of thermodynamics?

  1. Energy cannot be created or destroyed.
  2. Energy cannot be transferred or transformed
  3. The entropy of the universe is decreasing
  1. Energy cannot be created or destroyed.
4

Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier known as the reaction's

  1. entropy.
  2. activation energy.
  3. endergony.

b. activation energy.

5

Substrate-level phosphorylation occurs __________.

  1. in glycolysis
  2. in the citric acid cycle
  3. in both glycolysis and the citric acid cycle
  4. during oxidative phosphorylation

c. in both glycolysis and the citric acid cycle

6

Which metabolic pathway is common to cellular respiration and fermentation?

  1. citric acid cycle
  2. electron transport chain
  3. glycolysis
  4. reduction of pyruvate

c. glycolysis

7

Starting with one molecule of glucose, the energy-containing products of glycolysis are ___________.

  1. 2 NAD+, 2 pyruvate, and 2 ATP
  2. 2 NADH, 2 pyruvate, and 2 ATP
  3. 2 FADH2, 2 pyruvate, and 4 ATP
  4. 6 CO2, 2 pyruvate, and 2 ATP

b. 2 NADH, 2 pyruvate, and 2 ATP

8

The lock-and-key analogy for enzymes applies to the specificity of enzymes __________.

  1. as they form their tertiary and quaternary structure
  2. binding to their substrate
  3. interacting with water
  4. interacting with ions

b. binding to their substrate

9

Firefly Luciferase catalyzes the following reaction: Luciferin + ATP → Adenyl-Luciferin + pyrophosphate. What is the role of luciferase?

  1. Makes free energy more negative
  2. Lowers the energy of the transition state of the reaction
  3. Makes the reaction irreversible

b. Lowers the energy of the transition state of the reaction

10

Which of the following describe(s) some aspect of metabolism?

  1. control of enzyme activity
  2. synthesis of macromolecules
  3. breakdown of macromolecules
  4. All of the choices are correct.

d. All of the choices are correct.