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krebs cycle

Total questions: 20

Worksheet time: 9mins

Name
Class
Date
1.

The chemical from glycolysis combines with a 4 carbon molecule called what?

a)

citric acid

b)

pyruvate

c)

acetyl-coA

d)

ATP synthase

2.

The second stage of cellular respiration is ...

a)

Krebs Cycle

b)

Glycolysis

c)

ETC

3.

How many GTP molecules are formed in Krebs cycle for one acetyl co A ?

a)

1

b)

2

c)

3

d)

4

4.

location of Krebs cycle ?

a)

Mitochondria

b)

Cytoplasm

c)

Ribosomes

d)

lysosomes

5.

How many FADH2 molecules are produced by 1 molecule of glucose in krebs cycle?

a)
1
b)
2
c)
3
d)
4
6.
How many NADH molecules are produced by a molecule of glucose through the Krebs' Cycle?
a)
2
b)
3
c)
4
d)
6
7.

Foldings of inner mitochondrial membrane are called:

a)
Cristae
b)
Matrix
c)
Golgi Bodies
d)
Carbuncles
8.

The inner chamber of mitochondrion is called the:

a)
Cristae
b)
Matrix
c)
Golgi Bodies
d)
Carbuncles
9.
Krebs Cycle is part of_______________ respiration.
a)
Aerobic
b)
Anaerobic
10.
Prior to entering the Krebs Cycle, each pyruvate molecule loses electrons, hydrogen ions, and a carbon, forming an energy-rich molecule of
a)
Acetyl-CoA
b)
Citrate
c)
Oxaloacetate
d)
Malate
11.

Acetyl-CoA CONDENSES WITH ________________________ to form ________________________.

a)

6 carbon compound; acetate

b)

3 carbon compound; acetyl-CoA

c)

4 carbon compound; acetyl-CoA

d)

4 carbon compound; citrate

e)

6 carbon compound; citrate

12.

How many C atoms does acetyl CoA contain?

a)

1

b)

2

c)

3

d)

4

13.

The removal of carbon from a molecule in the form of carbon dioxide is known as

a)

decarboxylation

b)

dehydrogenation

c)

phosphorylation

d)

oxidation

14.

All of the following are the products of pyruvate oxidation except?

a)

ATP

b)

CO2

c)

NADH2

d)

ACETYL CO A

15.

ATP is produced when _________ is converted to ____________

a)

Fumerate to Malate

b)

Malate to Oxaloacetate

c)

Succinyl co A to Succinate

d)

Alpha ketogluterate to succinyl co A

16.

FADH2 is produced during oxidation of ___________

a)

Succinate to Fumarate

b)

Fumarate to Malate

c)

Malate to Oxaloacetate

d)

Oxaloacetate to Citrate

17.
How many NADH molecules are produced by a molecule of glucose through the Krebs' Cycle?
a)
2
b)
3
c)
4
d)
6
18.
The "regenerator" of the Krebs Cycle is:
a)
Oxaloacetate
b)
Acetyl-CoA
c)
Citrate
d)
α-Ketoglutarate
19.
Before entering Krebs Cycle, pyruvate is:
a)
Oxidized
b)
Reduced
c)
Isomerized to Acetyl-CoA
d)
Phosphorylated
20.
The Kreb's Cycle is also known as:
a)
The Pyruvic Cycle
b)
The Respirational Cycle
c)
The Citric Acid Cycle
d)
The Berk Cycle

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