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1.Oxygen that is consumed during cellular respiration is returned to the environment once it has been combined with which of the following substances?

ATP or inorganic phosphates

elemental carbon

nitrates or sulfates

glucose or nitrogen

carbon or hydrogen


2.Redox reactions involving Fe2+ and Fe3+ occur during aerobic cellular respiration. Where do these reactions take place?

Krebs cycle

glycolysis

the electron transport chain

the outer mitochondrial membrane

the cell membrane


3.The alternate fates of pyruvate in various organisms is primarily due to

optimizing the concentration of important biochemical intermediates

regenerating NAD+ for further reduction in the cytoplasm

maximizing ATP production in the mitochondrion

maximizing electron flow through the electron transport chain

none of the above

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Deanna HettingerLv2
28 Sep 2019
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Related questions


Fill in the blank in the following table:

metabolic cycle location pro/ eukaryote components substrates products pathway purpose
embden- meyerhof- parnas (glycolysis) cytoplasm/ cytoplasm 10 enzymes
pentose phosphate pathway cytoplasm/ cytoplasm

dozen enzyme

 1 Glucose (6 carbon), 1 NADP, 1ATP 1 Ribose-P (5 carbon) + 1CO2, 1NADPH, or sugars, 1 ADP Nucleotide synthesis, NADPH for anabolism
PDH reaction

cytoplasm/ mitochondria matrix
TCA/ Krebs/ citric acid cycle generation of high energy electron carriers, provide metabolic precursors
Electron transport chain + ATP synthase (aerobic respiration)
Electron transport chain + ATP synthase (anaerobic respiration) 1Nitrate or sulfate or CO2, 1NADH + ____ ADP Or 1FADH2+ ____ ADP N2, or NO2 or H2S or CH4 1NAD + ____ ATP Or 1FADH2+ ____ ATP Generate proton motive forces abd use to generate ATP regenerate NAD+
Fermentation cytoplasm/ cytoplasm 1 or more enzymes (vary by organism) 1 pyruvate, 1 NADH 1 alcohol or acid (maybe 1 CO2) NAD+ Regenerate NAD+

QUESTION 1

Which of the following is the correct order of the three stages of cellular respiration?

a.

Krebs cycle, glycolysis, electron transport
b.

electron transport, glycolysis, Krebs cycle
c.

Krebs cycle, electron transport, glycolysis
d.

glycolysis, Krebs cycle, electron transport
e.

electron transport, Krebs cycle, glycolysis

1 points

QUESTION 2

Consider a bacterial cell that performs anaerobic respiration. If that bacterial cell had access to six molecules of glucose to use, how many ATP molecules would it be able to produce?

a.

2
b.

34
c.

36
d.

6
e.

12

1 points

QUESTION 3

The oxygen that organisms need to live is used exclusively in which of the following metabolic pathways?

a.

Electron transport chain
b.

Anaerobic respiration
c.

Glycolysis
d.

Krebs cycle
e.

ATP-Synthase

1 points

QUESTION 4

The electron transport chain uses the energy in NADH and FADH2 to pump H+ ions from the matrix to the innermembrane space. The H+ gradient is then used to power ATP-Synthase. Enough H+ is pumped from the energy in a molecule of NADH to produce ______ ATP molecules, while enough H+ is pumped from the energy in a FADH2 molecule to produce ______ ATP molecules.

a.

three; two
b.

three; three
c.

two; two
d.

two; three

1 points

QUESTION 5

Which of the following list contains only products of cellular respiration?

a.

glucose, oxygen, ADP
b.

ATP, carbon dioxide
c.

oxygen, ADP, carbon dioxide
d.

ATP, glucose, oxygen
e.

glucose, ATP

1 points

QUESTION 6

What powers the enzyme ATP-Synthase?

a.

NADH molecules
b.

oxygen (O2)
c.

ATP
d.

NADH and FADH2 molecules
e.

The H+ gradient between the matrix and inner-membrane space

1 points

QUESTION 7

Organisms exist which are able to survive using only glycolysis (i.e. without using oxidative phosphorylation).

True

False

1 points

QUESTION 8

Each ADP molecule contains ________ phosphates, and each ATP molecule contains ________ phosphates.

a.

three; three
b.

two; two
c.

one; two
d.

two; three
e.

one; three

1 points

QUESTION 9

Adding a phosphate group to ADP to form ATP is an endergonic reaction.

True

False

1 points

QUESTION 10

The majority of ATP produced during cellular respiration is produced during glycolysis.

True

False

1 points

QUESTION 11

Glycolysis occurs:

a.

on enzymes located in the inner-membrane.
b.

in the cytosol.
c.

in the inner-membrane space.
d.

in the nucleus of the cell.
e.

in the matrix of mitochondria.

1 points

QUESTION 12

Muscle soreness associated with strenuous exercise is due to:

a.

the production of alcohol during anaerobic respiration.
b.

a buildup of lactic acid.
c.

an excessive amount of ATP that builds up during exercise.
d.

the large amounts of CO2 building up in the muscle.

1 points

QUESTION 13

A required reactant for glycolysis is:

a.

the electron transport chain.
b.

carbon dioxide.
c.

oxygen.
d.

NAD+.
e.

mitochondria.

1 points

QUESTION 14

NADH is produced in all of the following except:

a.

the electron transport chain.
b.

the Krebs cycle.
c.

glycolysis.

Question 1 Organisms exist which are able to survive using only glycolysis (i.e. without using oxidative phosphorylation).
True
False

Question 2 Glycolysis occurs:
a. in the matrix of mitochondria.
b. in the inner-membrane space.
c. in the cytosol.
d. in the nucleus of the cell.
e. on enzymes located in the inner-membrane.

Question 3 Muscle soreness associated with strenuous exercise is due to:
a. the large amounts of CO2 building up in the muscle.
b. an excessive amount of ATP that builds up during exercise.
c. a buildup of lactic acid.
d. the production of alcohol during anaerobic respiration.

Question 4 Each ADP molecule contains ________ phosphates, and each ATP molecule contains ________ phosphates.
a. two; three
b. two; two
c. three; three
d. one; three
e. one; two

Question 5 The oxygen that organisms need to live is used exclusively in which of the following metabolic pathways?
a. Glycolysis
b. Electron transport chain
c. Krebs cycle
d. Anaerobic respiration
e. ATP-Synthase

Question 6 NADH is produced in all of the following except:
a. the electron transport chain.
b. glycolysis.
c. the Krebs cycle.

Question 7 Consider a bacterial cell that performs anaerobic respiration. If that bacterial cell had access to six molecules of glucose to use, how many ATP molecules would it be able to produce?
a. 36
b. 6
c. 12
d. 34
e. 2

Question 8 The majority of ATP produced during cellular respiration is produced during glycolysis.
True
False

Question 9 What powers the enzyme ATP-Synthase?
a. The H+ gradient between the matrix and inner-membrane space
b. ATP
c. oxygen (O2)
d. NADH molecules
e. NADH and FADH2 molecules

Question 10 Which of the following list contains only products of cellular respiration?
a. ATP, glucose, oxygen
b. ATP, carbon dioxide
c. oxygen, ADP, carbon dioxide
d. glucose, ATP
e. glucose, oxygen, ADP

Question 11 Adding a phosphate group to ADP to form ATP is an endergonic reaction. True False

Question 12 The electron transport chain uses the energy in NADH and FADH2 to pump H+ ions from the matrix to the innermembrane space. The H+ gradient is then used to power ATP-Synthase. Enough H+ is pumped from the energy in a molecule of NADH to produce ______ ATP molecules, while enough H+ is pumped from the energy in a FADH2 molecule to produce ______ ATP molecules.
a. two; three
b. three; three
c. three; two
d. two; two

Question 13 Which of the following is the correct order of the three stages of cellular respiration?
a. glycolysis, Krebs cycle, electron transport
b. Krebs cycle, electron transport, glycolysis
c. electron transport, Krebs cycle, glycolysis
d. electron transport, glycolysis, Krebs cycle
e. Krebs cycle, glycolysis, electron transport

Question 14 A required reactant for glycolysis is:
a. carbon dioxide.
b. mitochondria.
c. NAD+.
d. the electron transport chain.
e. oxygen.

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