Mrs. Reema Al Bitar
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Mrs. Reema Al Bitar
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AP Biology Ch.10 Revision

Questão 1 de 10

1

1. Which of the following best describes the main purpose of the combined processes of glycolysis and cellular respiration?

Selecione uma das seguintes:

  • breaking down ATP, so that ADP and P can be reused

  • transforming the energy in glucose and related molecules in a chemical form that cells can use for work

  • the breakdown of glucose to carbon dioxide and water

  • producing complex molecules from chemical building blocks

Explicação

Questão 2 de 10

1

In the combined processes of glycolysis and cellular respiration, what is consumed and what is produced?

Selecione uma das seguintes:

  • Water is consumed, and ATP is produced.

  • Oxygen is consumed, and glucose is produced.

  • Carbon dioxide is consumed, and water is produced.

  • Glucose is consumed, and carbon dioxide is produced.

  • ATP is consumed, and oxygen is produced.

Explicação

Questão 3 de 10

1

Substrate-level phosphorylation occurs _____.

Selecione uma das seguintes:

  • in glycolysis only

  • in both glycolysis and the citric acid cycle

  • during oxidative phosphorylation

  • in the citric acid cycle

Explicação

Questão 4 de 10

1

The molecule that functions as the reducing agent (electron donor) in a redox or oxidation-reduction reaction _____.

Selecione uma das seguintes:

  • gains electrons and loses potential energy

  • loses electrons and gains potential energy

  • loses electrons and loses potential energy

  • gains electrons and gains potential energy

Explicação

Questão 5 de 10

1

When electrons move closer to a more electronegative atom, what happens? The more electronegative atom is _____.

Selecione uma das seguintes:

  • oxidized, and energy is released

  • oxidized, and energy is consumed

  • reduced, and energy is released

  • reduced, and energy is consumed

Explicação

Questão 6 de 10

1

Which of the following statements about NAD+ is true?

Selecione uma das seguintes:

  • NAD+ has more chemical energy than NADH.

  • In the absence of NAD+, glycolysis can still function.

  • NAD+ is reduced to NADH during glycolysis, pyruvate oxidation, and the citric acid cycle.

  • NAD+ can donate electrons for use in oxidative phosphorylation.

Explicação

Questão 7 de 10

1

Which of the following describes the process of glycolysis?

Selecione uma das seguintes:

  • It converts one glucose molecule to two molecules of pyruvate and carbon dioxide.

  • It represents the first stage in the chemical oxidation of glucose by a cell.

  • Glycolysis occurs in the mitochondria.

  • Glycolysis produces 30 ATP from each molecule of glucose.

  • It requires ATP and NADH.

Explicação

Questão 8 de 10

1

The free energy for the oxidation of glucose to CO2 and water is -686 kcal/mol and the free energy for the reduction of NAD+ to NADH is +53 kcal/mol. Why are only two molecules of NADH formed during glycolysis when it appears that as many as a dozen could be formed?

Selecione uma das seguintes:

  • There is no CO2 or water produced as products of glycolysis.

  • Most of the free energy available from the oxidation of glucose is used in the production of ATP in glycolysis.

  • Most of the free energy available from the oxidation of glucose remains in pyruvate, one of the products of glycolysis.

  • Glycolysis is a very inefficient reaction, with much of the energy of glucose released as heat.

Explicação

Questão 9 de 10

1

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

Selecione uma das seguintes:

  • 2 NAD+, 2 pyruvate, and 2 ATP

  • 2 NADH, 2 pyruvate, and 2 ATP

  • 2 FADH2, 2 pyruvate, and 4 ATP

  • 6 CO2, 2 pyruvate, and 2 ATP

Explicação

Questão 10 de 10

1

Which kind of metabolic poison would most directly interfere with glycolysis?

Selecione uma das seguintes:

  • an agent that closely mimics the structure of glucose but is not metabolized

  • an agent that reacts with NADH and oxidizes it to NAD+

  • an agent that binds to pyruvate and inactivates it

  • an agent that reacts with oxygen and depletes its concentration in the cell

Explicação

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