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The Krebs Cycle
Test Description: This review will help students understand some characterisitics of this process.
Instructions: Answer all questions to get your test result.
1) In the presence of oxygen, what substance passes from glycolysis to the Krebs cycle?
A
sulfuric acid
B
nitric acid
C
acetic acid
D
pyruvic acid
2) After entering the mitochondria, the pyruvic acid is broken down and 1 carbon atom becomes part of a molecule of:
A
carbon trioxide
B
carbon dioxide
C
carbon monoxide
D
carbon acetate
3) What part of the cell is the location for the process of the Krebs cycle?
A
nucleus
B
ribosome
C
endoplasmic reticulum
D
mitochondria
4) The remaining 2 atoms of carbon from the breakdown of pyruvic acid rearrange and become:
A
acetic acid
B
nitric acid
C
pyruvic acid
D
sulfuric acid
5) When the newly formed acetic acid joins with the compound coenzyme A, the resulting molecule is called:
A
acetyl-CoA
B
nitric-CoB
C
nitric-CoA
D
acetyl-CoB
6) As the Krebs cycle begins, Acetyl-CoA helps produce a 6-carbon molecule called:
A
nitric acid
B
pyruvic acid
C
acetic acid
D
citric acid
7) The innermost compartment of a mitochondrion and the site of the Krebs cycle reaction is called the:
A
maxtrium
B
matrix
C
maxetate
D
material
8) After the one atom of carbon bonds to form carbon dioxide, the carbon dioxide is released into the:
A
mitochondria
B
water
C
air
D
matrix
9) The acetyl part of acetyl-CoA is made up of:
A
3 carbon atom, 1 oxygen atoms, and 3 hydrogen atoms
B
2 carbon atom, 1 oxygen atoms, and 3 hydrogen atoms
C
1 carbon atom, 2 oxygen atoms, and 3 hydrogen atoms
D
2 carbon atom, 2 oxygen atoms, and 2 hydrogen atoms
10) What type of reactions is pyruvic acid broken down into carbon dioxide?
A
energy-fluxing
B
energy-releasing
C
energy-creating
D
energy-extracting
*select an answer for all questions
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