WorksheetsThe Link Reaction and the Kreb's Cycle
Total questions: 19
Worksheet time: 15mins
Name
Class
Date
1.
The "regenerator" molecule of the Krebs Cycle is:
a)
Oxaloacetate
b)
Acetyl-CoA
c)
Citrate
d)
α-Ketoglutarate
2.
Before entering Krebs Cycle, pyruvate is:
a)
Oxidized
b)
Reduced
c)
Isomerized to Acetyl-CoA
d)
Phosphorylated
3.
How many FADH2 molecules are produced by 1 molecule of glucose?
a)
1
b)
2
c)
3
d)
4
4.
The number of ATP molecules produced out of Krebs Cycle is:
a)
2
b)
3
c)
4
d)
0
5.
How many FADH2 molecules are produced by 1 turn of the Krebs Cycle?
a)
1
b)
2
c)
3
d)
4
6.
How many CO2 molecules are produced by the Krebs Cycle for a molecule of glucose?
a)
2
b)
4
c)
6
d)
3
7.
After Krebs Cycle, how many Carbon atoms from the original glucose molecule remain?
a)
0
b)
1
c)
3
d)
2
8.
Krebs Cycle takes place in the:
a)
Cytoplasm
b)
Matrix
c)
Ribsome
d)
InterMembrane Space
9.
Folds in the mitochondrion are called:
a)
Cristae
b)
Matrix
c)
Golgi Bodies
d)
Carbuncles
10.
The inner most interior of the mitochondrion is called the:
a)
Cristae
b)
Matrix
c)
Golgi Bodies
d)
Carbuncles
11.
Krebs Cycle is part of_______________ respiration.
a)
Aerobic
b)
Anaerobic
12.
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
13.
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
14.
How many carbon atoms does each pyruvate feed into the Krebs Cycle?
a)
1
b)
2
c)
3
d)
4
15.
NADH + H+ -> NAD+ is
a)
Oxidation
b)
Reduction
16.
NAD+ is
a)
A vitamin
b)
The reduced form of a oenzyme required for glycolysis
c)
Oxidized form of a coenzyme required for the Kreb's cycle
d)
All of the above
17.
NADH -- H+ ----> NAD+ is a reaction that demonstrates
a)
oxidation
b)
reduction
c)
activation
d)
all of these
18.
The CO2 that is produced immediately before the Krebs cycle comes from
a)
the removal of a C atom from glucose
b)
the addition of a C atom to glucose
c)
the removal of one carbon atom and 2 oxygen atoms from a pyruvate
d)
the addition of one carbon atom and 2 oxygen atoms to a pyruvate
19.
After Acetyl-CoA is added to an oxaloacetate molecule, __________ is immediately formed. This is why the Kreb's cycle is sometimes called the citric acid cycle.
a)
malate
b)
succinate
c)
citrate
d)
ketoglutarate
100 %
