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KREB'S CYCLE:

Where does carbon in the Kreb's cycle go?

ELECTRON TRANSPORT CHAIN:

What are the main features of the electron transport chain, and how is it used to generate ATP?

How is energy used indirectly to drive ATP synthase?

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Keith Leannon
Keith LeannonLv2
4 Mar 2019
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Related questions

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.

1. Which process releases energy?

Hydrolysis of ATP

Synthesis of ATP

2. How many net ATP are synthesized in glycolysis per glucose

30+

4

2

3. Where does glycolysis occur?

Nucleus

Endoplasmic reticulum

Cytosol

Mitochondria

4. How many net ATP are synthesized per glucose in glycolysis and the TCA (Krebs, citric acid) cycle combined?

4

2

30+

5. Where does the TCA (Krebs, citric acid) cycle occur?

Cytosol

Nucleus

Mitochondria

Endoplasmic reticulum

6. How many net ATP are synthesized per glucose in glycolysis, the TCA (Krebs, citric acid) cycle and from the electron transport chain combined.

2

4

30+

7. Where is the electron transport chain located?

Cytosol

Endoplasmic reticulum

Mitochondria

Nucleus

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