Question 1

If glucose is unavailable,aerobic respiration may occur with

Accepted Answer

A) All choices are correct. 
B) proteins. 
C) carbohydrates,including starch and glycogen. 
D) fats. 
A) All choices are correct. 
B) proteins. 
C) carbohydrates,including starch and glycogen. 
D) fats. A

Question 2

Which energy pathway is used by all living organisms?

Accepted Answer

A) Aerobic respiration 
B) Carbon reactions 
C) Photosynthesis 
D) Krebs cycle 
E) Glycolysis 
A) Aerobic respiration 
B) Carbon reactions 
C) Photosynthesis 
D) Krebs cycle 
E) Glycolysis E

Question 3

The electron transport chain extracts most of the potential energy in NADH by removing the energy from its electrons in a single step.

Accepted Answer

A) True 
 B)False  False

Question 4

Since the Krebs cycle is a cyclic pathway,the original acceptor needed to start the Krebs cycle and the end product of the Krebs cycle are

Accepted Answer

A) enzymes. 
B) different molecules. 
C) ATP molecules. 
D) the same molecule. 
E) NADH and FADH2 respectively. 
A) enzymes. 
B) different molecules. 
C) ATP molecules. 
D) the same molecule. 
E) NADH and FADH2 respectively.

Question 5

The enzyme that forms a channel in the inner membrane of the mitochondria and adds a phosphate to ADP is

Accepted Answer

A) ATP synthase. 
B) NADH synthase. 
C) FADH2 synthase. 
D) ADP synthase. 
E) NADPH synthasE. 
A) ATP synthase. 
B) NADH synthase. 
C) FADH2 synthase. 
D) ADP synthase. 
E) NADPH synthasE.

Question 6

If some of the protons are utilized for other functions on the cell and do not flow through ATP synthase after the electron transport chain,then

Accepted Answer

A) fewer ATP will be made. 
B) fewer glucose molecules are needed. 
C) more ATP will be made. 
D) more glucose molecules are needeD. 
E) more carbon dioxide molecules are generated. 
A) fewer ATP will be made. 
B) fewer glucose molecules are needed. 
C) more ATP will be made. 
D) more glucose molecules are needeD. 
E) more carbon dioxide molecules are generated.

Question 7

In the section "Investigating Life: Plants' Alternative Lifestyles Yield Hot Sex",what did the scientists conclude from the figure?

Accepted Answer

A) At higher temperatures resting beetles saved energy. 
B) At higher temperatures active beetles saved energy. 
C) At lower temperatures active beetles saved energy. 
D) At lower temperatures resting beetles saved energy. 
E) Generating heat led to increased pollination of Philodendron flowers by beetles. 
A) At higher temperatures resting beetles saved energy. 
B) At higher temperatures active beetles saved energy. 
C) At lower temperatures active beetles saved energy. 
D) At lower temperatures resting beetles saved energy. 
E) Generating heat led to increased pollination of Philodendron flowers by beetles.

Question 8

The first two steps in glycolysis involve

Accepted Answer

A) lysing glucose into two 3C molecules. 
B) reducing glucose. 
C) transferring phosphates from ATP to glucose. 
D) generating ATP. 
E) donating electrons from NADH to an electron transporter. 
A) lysing glucose into two 3C molecules. 
B) reducing glucose. 
C) transferring phosphates from ATP to glucose. 
D) generating ATP. 
E) donating electrons from NADH to an electron transporter.

Question 9

Human muscle cells complete fermentation and anaeobic respiration.

Accepted Answer

A) True 
 B)False

Question 10

If you put a plant in a chamber and shine a light on it,

Accepted Answer

A) the concentration of O2 will increase and the concentration of CO2 will decrease. 
B) the concentration of O2 will decrease and the concentration of CO2 will increase. 
C) the concentrations of O2 and CO2 will decrease. 
D) the concentrations of O2 and CO2 will increase. 
A) the concentration of O2 will increase and the concentration of CO2 will decrease. 
B) the concentration of O2 will decrease and the concentration of CO2 will increase. 
C) the concentrations of O2 and CO2 will decrease. 
D) the concentrations of O2 and CO2 will increase.

Question 11

The electrons that are transferred during cellular respiration are carried in the molecules

Accepted Answer

A) NADP and FADH2. 
B) NADH and FADH2. 
C) carbon dioxide. 
D) NADH2 and glucose. 
E) acetyl CoA. 
A) NADP and FADH2. 
B) NADH and FADH2. 
C) carbon dioxide. 
D) NADH2 and glucose. 
E) acetyl CoA.

Question 12

In the section "Investigating Life: Plants' Alternative Lifestyles Yield Hot Sex",the rate of carbon dioxide production by Cyclocephala colasi beetles was used to measure their

Accepted Answer

A) ability to pollinate flowers. 
B) rate of photosynthesis. 
C) body temperature. 
D) level of activity. 
E) rate of respiration. 
A) ability to pollinate flowers. 
B) rate of photosynthesis. 
C) body temperature. 
D) level of activity. 
E) rate of respiration.

Question 13

The Krebs cycle produces ______,______,and carbon dioxide.

Accepted Answer

A) glucose,oxygen 
B) oxygen,ATP 
C) ATP,electron carriers 
D) electron carriers,oxygen 
E) pyruvate,PGAL 
A) glucose,oxygen 
B) oxygen,ATP 
C) ATP,electron carriers 
D) electron carriers,oxygen 
E) pyruvate,PGAL

Question 14

The main reason that cellular respiration needs to occur step by step is because

Accepted Answer

A) cells do not store enough oxygen. 
B) cells do not contain many mitochondria. 
C) glucose breaks down slowly inside a cell. 
D) it enables cells to harness energy released at each step. 
E) cells produce the enzymes needed for cellular respiration very slowly. 
A) cells do not store enough oxygen. 
B) cells do not contain many mitochondria. 
C) glucose breaks down slowly inside a cell. 
D) it enables cells to harness energy released at each step. 
E) cells produce the enzymes needed for cellular respiration very slowly.

Question 15

If you measure the air a person has inhaled and exhaled,you will find that the concentrations have ______ in the exhaled air.

Accepted Answer

A) higher O2 concentrations and lower CO2 concentrations 
B) lower O2 concentrations and higher CO2 concentrations 
C) lower O2 and CO2 concentrations 
D) higher O2 and CO2 concentrations 
A) higher O2 concentrations and lower CO2 concentrations 
B) lower O2 concentrations and higher CO2 concentrations 
C) lower O2 and CO2 concentrations 
D) higher O2 and CO2 concentrations

Question 16

The area enclosed by the highly-folded inner mitochondrial membrane is the

Accepted Answer

A) cytoplasm. 
B) nucleus. 
C) outer membrane. 
D) intermembrane compartment. 
E) matrix. 
A) cytoplasm. 
B) nucleus. 
C) outer membrane. 
D) intermembrane compartment. 
E) matrix.

Question 17

What is the function of the two membranes of mitochondria?

Accepted Answer

A) Glycolysis occurs in the membranes. 
B) Protons are pumped into the space between the membranes. 
C) Oxygen is transported across the membranes. 
D) The mitochondria may rupture due to osmosis without two membranes. 
E) The Krebs cycle enzymes are found on the outer mitochondrial membranE. 
A) Glycolysis occurs in the membranes. 
B) Protons are pumped into the space between the membranes. 
C) Oxygen is transported across the membranes. 
D) The mitochondria may rupture due to osmosis without two membranes. 
E) The Krebs cycle enzymes are found on the outer mitochondrial membranE.

Question 18

The compound that enters the Krebs cycle is

Accepted Answer

A) ATP. 
B) pyruvate. 
C) PGAL. 
D) ATP synthase. 
E) acetyl CoA. 
A) ATP. 
B) pyruvate. 
C) PGAL. 
D) ATP synthase. 
E) acetyl CoA.

Question 19

The three main biochemical pathways of cellular respiration are

Accepted Answer

A) glycolysis,photosystems,and carbon reactions. 
B) carbon reactions,Krebs cycle,and light reactions. 
C) Krebs cycle,carbon reactions,and electron transport chain. 
D) glycolysis,Krebs cycle,and electron transport chain. 
E) light reactions,carbon reactions,and electron transport chain. 
A) glycolysis,photosystems,and carbon reactions. 
B) carbon reactions,Krebs cycle,and light reactions. 
C) Krebs cycle,carbon reactions,and electron transport chain. 
D) glycolysis,Krebs cycle,and electron transport chain. 
E) light reactions,carbon reactions,and electron transport chain.

Question 20

The products of fermentation can be converted to reactants of aerobic respiration.

Accepted Answer

A) True 
 B)False

Exam 6: How Cells Release Energy

If glucose is unavailable,aerobic respiration may occur with

Which energy pathway is used by all living organisms?

The electron transport chain extracts most of the potential energy in NADH by removing the energy from its electrons in a single step.

Since the Krebs cycle is a cyclic pathway,the original acceptor needed to start the Krebs cycle and the end product of the Krebs cycle are

The enzyme that forms a channel in the inner membrane of the mitochondria and adds a phosphate to ADP is

If some of the protons are utilized for other functions on the cell and do not flow through ATP synthase after the electron transport chain,then

In the section "Investigating Life: Plants' Alternative Lifestyles Yield Hot Sex",what did the scientists conclude from the figure?

The first two steps in glycolysis involve

Human muscle cells complete fermentation and anaeobic respiration.

If you put a plant in a chamber and shine a light on it,

The electrons that are transferred during cellular respiration are carried in the molecules

In the section "Investigating Life: Plants' Alternative Lifestyles Yield Hot Sex",the rate of carbon dioxide production by Cyclocephala colasi beetles was used to measure their

The Krebs cycle produces ______,______,and carbon dioxide.

The main reason that cellular respiration needs to occur step by step is because

If you measure the air a person has inhaled and exhaled,you will find that the concentrations have ______ in the exhaled air.

The area enclosed by the highly-folded inner mitochondrial membrane is the

What is the function of the two membranes of mitochondria?

The compound that enters the Krebs cycle is

The three main biochemical pathways of cellular respiration are

The products of fermentation can be converted to reactants of aerobic respiration.

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The Krebs cycle produces ,,and carbon dioxide.