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Post-Test
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1
The oxidation of foodstuffs to obtain energy is called respiration.
A)True
B)False
2
Chemically, there is little difference between the oxidation of carbohydrates in a cell and the burning of wood in a fireplace.
A)True
B)False
3
The first stage of cellular respiration takes place in the ___________ of a cell.
A)nucleus
B)cytoplasm
C)membrane
D)mitochondria
4
The stage of cellular respiration that does not require oxygen is
A)ethanol fermentation.
B)the Kreb's cycle.
C)lactic acid fermentation.
D)glycolysis.
5
Cellular respiration involves the dismantling of food molecules to obtain oxygen.
A)True
B)False
6
The second stage of cellular respiration takes place within the ________ of a cell.
A)nucleus
B)cytoplasm
C)cell membrane
D)mitochondria
7
During anaerobic respiration, ATP are produced exclusively by glycolysis.
A)True
B)False
8
Lactic acid fermentation occurs in muscle fibers and can result in the accumulation of ethanol.
A)True
B)False
9
During fermentation, yeast adds hydrogens from NADH to acetaldehyde to form ethanol.
A)True
B)False
10
The carbon atoms from a completely oxidized glucose molecule become part of carbon dioxide.
A)True
B)False
11
The stripping of electrons from food molecules is reduction.
A)True
B)False
12
_________________ is the end product of glycolysis and is the starting material for the Kreb's cycle.
A)Glucose
B)Carbon dioxide
C)Water
D)Pyruvate
13
In ethanol fermentation, pyruvate is reduced directly and the product is lactate.
A)True
B)False
14
The electrons harvested by oxidizing food molecules are used to power proton pumps that chemiosmotically drive the production of ATP.
A)True
B)False
15
A biochemical pathway is a series of sequential biochemical reactions.
A)True
B)False
16
The food that you eat provides cells with __________ to fuel cellular respiration.
A)amino acids
B)fatty acids
C)glucose
D)All of the above
17
Common end-products of fermentation include
A)glucose.
B)ethanol.
C)lactic acid.
D)pyruvate.
E)Both 2 and 3
18
In mitochondria the Kreb's cycle takes place in
A)the outermost membrane.
B)the matrix.
C)pores located throughout the inner membrane.
D)all parts of the organelle.
19
The electron transport chain powers the production of ATP and uses electrons to link an oxygen atom with hydrogen ions to form
A)carbon dioxide.
B)oxygen gas.
C)water.
D)glucose.
20
The electron transport chain is located in the ______________ of the mitochondria.
A)outermost membrane
B)matrix
C)inner membrane
D)intermembrane space





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