LIFE 120 chapter 7

Substrate-level phosphorylation accounts for approximately what percentage of the ATP formed by the reactions of glycolysis?

100%

For every one molecule of glucose, _______ pyruvate molecules are produced.

2

For each molecule of pyruvate that enters the mitochondria, ________ molecules of NADH are produced by the end of the citric acid cycle.

4

From glycolysis to the end of the citric acid cycle, one molecule of glucose has been used to produce a net of approximately ______ molecules of ATP

4

For every molecule of glucose, ___________ molecules of CO2 are produced.

6

During chemiosmosis,

ATP is synthesized when H+ ions move through a channel in ATP synthase.

Which of the following statements describes the results of this reaction?C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + Energy

C6H12O6 is oxidized and O2 is reduced

Which stage of cellular respiration requires oxygen that you breathe?

Electron transport chain

Fatty acid metabolism bypasses which of the following processes?

Glycolysis

Which of the following statements about NAD+ is true

NAD+ is reduced to NADH during glycolysis.

Which of the following statements most completely describes the process of cellular respiration?

The electrons from food are given to oxygen to make water and the energy released is used to make ATP.

Explain how molecules other than glucose can be used as energy sources.

They are modified first and then enter the same metabolic pathway as glucose.

During cell respiration, the breakdown of glucose to carbon dioxide is completed by the end of the

citric acid cycle

During ________ and ________, enzymes transfer the electrons from a substrate molecule in order to reduce NAD+ and make NADH.

glycolysis and the citric acid cycle

During which of the following phases of cellular respiration does substrate-level phosphorylation take place?

glycolysis and the citric acid cycle

A molecule that is phosphorylated

has increased chemical potential energy that may be used to do cellular work.

During the electron transport chain FADH2 and NADH are

oxidized

During the electron transport chain, when hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space, the result is

the creation of a proton-motive force.

When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space, the result is

the creation of a proton-motive force.