Download Kreb Worksheet

Student Worksheet
LSM 2.2-3
The Krebs Cycle
Fill in the molecules created or released during the Krebs cycle. Fill in the blanks of the summaries.
Pyruvate Oxidation
enters the mitochondrion from the cytoplasm.
One
atom is removed via
is removed using
.
becomes attached to the remaining
creating
and
atoms,
Krebs Cycle
enters the cycle and then combines
, which then enters the Krebs cycle.
with
to make the six-carbon compound
. During the eight steps of the Krebs cycle,
undergoes a number of reactions, releasing
and
in a number of steps.
eventually converted into
CoA
is
so it can be
used again during the Krebs cycle.
CoA– SH
CoA– SH
CoA– SH
Products of the Krebs Cycle
1.
2.
is released as waste.
and
move to the next stage of cellular respiration.
3. Energy is released in the form of
molecules of
each molecule of
Copyright © 2003 Nelson
. A glucose molecule produces
because two molecules of
are created from
.
Chapter 2 Cellular Respiration 45
Student Worksheet Solutions
LSM 2.2-4
The Krebs Cycle, Solution
Fill in the molecules created or released during the Krebs cycle. Fill in the blanks of the summaries.
Pyruvate Oxidation
Pyruvate enters the mitochondrion from the cytoplasm.
One
carbon
hydrogen
atom is removed via
is removed using
decarboxylation
NAD+
becomes attached to the remaining
.
and
Coenzyme A
carbon
atoms,
Krebs Cycle
Acetyl-CoA
creating acetyl – CoA , which then enters the Krebs cycle.
with
enters the cycle and then combines
oxaloacetate
to make the six-carbon compound
citrate . During the eight steps of the Krebs cycle,
citrate
NAD+
CO2
NADH
CO2
undergoes a number of reactions, releasing
and
ATP in a number of steps.
eventually converted into
CoA
oxaloacetate
Citrate
is
so it can be
used again during the Krebs cycle.
CoA– SH
CO2
NADH
NAD+
NAD
NADH
CoA– SH
CO2
NAD+
NADH
CoA– SH
FADH2
FAD
GTP
GDP
ADP + Pi
ATP
Products of the Krebs Cycle
1. CO2 is released as waste.
2.
NADH and FADH 2 move to the next stage of cellular respiration.
3. Energy is released in the form of ATP . A glucose molecule produces two
molecules of ATP because two molecules of
pyruvate are created from
each molecule of glucose .
46 Chapter 2 Cellular Respiration
Copyright © 2003 Nelson