Chapter 7 Practice Test

How many molecules of ATP are formed from each molecule of glucose during aerobic respiration?

38

The electron transport chain is driven by two products of the Krebs cycle. They are ________________.

NADH and FADH2

Which of the following is NOT formed during the Krebs cycle?

NADPH

Bread rises as the result of ___________.

alcoholic fermentation

The breakdown of organic compounds to produce ATP is known as _______.

cellular respiration

ATP and NADH donate electrons to the electron transport chain.

false

Animal cells can produce alcohol through the alcoholic fermentation process.

false

Glycolysis is an efficient pathway for extracting energy from glucose.

false

In aerobic respiration, glucose molecules are converted into acetyl CoA molecules when they enter the Krebs cycle.

false

In cellular respiration, glycolysis follows the Krebs cycle.

false

Yeasts produce alcohol and CO2 in the process of lactic-acid fermentation.

false

The name of the process that takes place when organic compounds are broken down in the absence of oxygen is ___________.

fermentation

The two portions of cellular respiration are ____________.

glycolysis and oxidative respiration

Glycolysis and oxidative respiration are different in that ________.

glycolysis occurs in the absence of oxygen, while oxidative respiration requires oxygen

In respiration, the electron transport in mitochondria takes place _______.

in the inner membrane

ATP _____________.

is essential for a cell to perform all the tasks necessary for life Correct

When cells break down food molecules, energy __________.

is temporarily stored as ATP molecules Correct

When muscles are exercised extensively in the absence of sufficient oxygen, ________________.

lactic acid is produced

In a cell, aerobic respiration occurs mainly in the ___________.

mitochondria

The process that involves oxygen and breaks down food molecules to release energy is ______________.

oxidative respiration

The final acceptor for all electrons produced in respiration is _____________.

oxygen

Glycolysis begins with glucose and produces _______.

pyruvic acid

When glycolysis occurs ________________.

some ATP is produced, one of molecule glucose is split, and two molecules of pyruvic acid is made

Water is an end product in ____________.

the electron transport chain

Cellular respiration occurs in plants.

true

If no oxygen is present in the cell, the pyruvic acid goes through fermentation.

true

In cellular respiration, more energy is transferred in the electron transport chain than in any other step.

true

Lactic acid fermentation is a type of anaerobic respiration.

true

The Kreb cycle is considered aerobic.

true