Question 1

Most of the CO₂ from the catabolism of glucose is released during _____.

Accepted Answer

A) glycolysis 
B) electron transport 
C) chemiosmosis 
D) the Krebs cycle 
A) glycolysis 
B) electron transport 
C) chemiosmosis 
D) the Krebs cycle

Question 2

Fatty acids usually have an even number of carbons in their structures.They are catabolized by a process called beta-oxidation.The end products of the metabolic pathway are acetyl groups of acetyl CoA molecules.What is the most likely fate of the acetyl groups?

Accepted Answer

A) They directly enter the electron transport chain. 
B) They directly enter the energy-yielding stages of glycolysis. 
C) They are directly decarboxylated by pyruvate dehydrogenase. 
D) They directly enter the Krebs cycle. 
A) They directly enter the electron transport chain. 
B) They directly enter the energy-yielding stages of glycolysis. 
C) They are directly decarboxylated by pyruvate dehydrogenase. 
D) They directly enter the Krebs cycle.

Question 3

A substrate-level phosphorylation occurs in the Krebs cycle when _____.

Accepted Answer

A) GDP is phosphorylated to produce GTP 
B) NAD⁺ is phosphorylated to NADH 
C) oxaloacetate is phosphorylated 
D) acetylation of oxaloacetate takes place 
A) GDP is phosphorylated to produce GTP 
B) NAD⁺ is phosphorylated to NADH 
C) oxaloacetate is phosphorylated 
D) acetylation of oxaloacetate takes place

Question 4

What is the function of coenzyme A in the Krebs cycle?

Accepted Answer

A) It is the coenzyme of carboxylation reactions. 
B) It is the coenzyme of redox reactions. 
C) It is a coenzyme of decarboxylation reactions. 
D) It is the coenzyme of acetylation reactions. 
A) It is the coenzyme of carboxylation reactions. 
B) It is the coenzyme of redox reactions. 
C) It is a coenzyme of decarboxylation reactions. 
D) It is the coenzyme of acetylation reactions.

Question 5

The inner mitochondrial membrane normally _____.

Accepted Answer

A) contains permease channels that allow small ions and water to pass readily through the membrane by simple diffusion 
B) contains an active transport pump that pumps protons into the inner mitochondrial compartment from the point of high concentration to a point of lower concentration 
C) is virtually impermeable to hydrogen ions (protons) 
D) contains enzymes responsible for two of the chemical reactions that take place as part of glycolysis 
A) contains permease channels that allow small ions and water to pass readily through the membrane by simple diffusion 
B) contains an active transport pump that pumps protons into the inner mitochondrial compartment from the point of high concentration to a point of lower concentration 
C) is virtually impermeable to hydrogen ions (protons) 
D) contains enzymes responsible for two of the chemical reactions that take place as part of glycolysis

Question 6

The first CO₂ that is released during aerobic cellular respiration is _____.

Accepted Answer

A) during glycolysis 
B) between glycolysis and the Krebs cycle 
C) during the Krebs cycle 
D) just after the Krebs cycle 
A) during glycolysis 
B) between glycolysis and the Krebs cycle 
C) during the Krebs cycle 
D) just after the Krebs cycle

Question 7

A cell has enough available ATP to meet its needs for about 30 seconds.What is likely to happen when an athlete exhausts his or her ATP supply?

Accepted Answer

A) He or she has to sit down and rest. 
B) Catabolic processes are activated that generate more ATP. 
C) ATP is transported into the cell from the circulatory system. 
D) Other cells take over,and the muscle cells that have used up their ATP cease to function. 
A) He or she has to sit down and rest. 
B) Catabolic processes are activated that generate more ATP. 
C) ATP is transported into the cell from the circulatory system. 
D) Other cells take over,and the muscle cells that have used up their ATP cease to function.

Exam 9: Cellular Respiration and Fermentation

Most of the CO₂ from the catabolism of glucose is released during _____.

Fatty acids usually have an even number of carbons in their structures.They are catabolized by a process called beta-oxidation.The end products of the metabolic pathway are acetyl groups of acetyl CoA molecules.What is the most likely fate of the acetyl groups?

A substrate-level phosphorylation occurs in the Krebs cycle when _____.

What is the function of coenzyme A in the Krebs cycle?

The inner mitochondrial membrane normally _____.

The first CO₂ that is released during aerobic cellular respiration is _____.

A cell has enough available ATP to meet its needs for about 30 seconds.What is likely to happen when an athlete exhausts his or her ATP supply?

Biology and the Tree of Life

Water and Carbon: the Chemical Basis of Life

Protein Structure and Function

Nucleic Acids and the Rna World

An Introduction to Carbohydrates

Lipids, membranes, and the First Cells

Inside the Cell

Cell-Cell Interactions

Photosynthesis

The Cell Cycle

Meiosis

Mendel and the Gene

Dna and the Gene: Synthesis and Repair

How Genes Work

Transcription and Translation

Control of Gene Expression in Bacteria

Control of Gene Expression in Eukaryotes

Analyzing and Engineering Genes

Genomics

Principles of Development

An Introduction to Animal Development

An Introduction to Plant Development

Evolution by Natural Selection

Evolutionary Processes

Speciation

Phylogenies and the History of Life

Bacteria and Archaea

Protists

Green Plants

Fungi

An Introduction to Animals

Protostome Animals

Deuterostome Animals

Viruses

Plant Form and Function

Water and Sugar Transport in Plants

Plant Nutrition

Plant Sensory Systems, signals, and Responses

Plant Reproduction

Animal Form and Function

Water and Electrolyte Balance in Animals

Animal Nutrition

Gas Exchange and Circulation

Electrical Signals in Animals

Animal Sensory Systems and Movement

Chemical Signals in Animals

Animal Reproduction

The Immune System in Animals

An Introduction to Ecology

Behavioral Ecology

Population Ecology

Community Ecology

Ecosystems

Biodiversity and Conservation Biology

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