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AP Biology > AP BIO Chapter 4 Cell Respiration > Flashcards

AP BIO Chapter 4 Cell Respiration Flashcards

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1
Q

The role of oxygen in aerobic respiration
A) to transport CO2
B) most important in the Krebs cycle
C) to provide electrons for the electron transport chain
D) as the final H2 acceptor in the electron transport chain

A

D

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2
Q 
The loss of protons and electrons is known as
A) dehydration
B) hydrogenation
C) reduction
D) oxidation
A

D

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3
Q 
C6H12O6+6O2->6H2O + 6CO2 + 38ATP
The process shown is
A) reduction and is endergonic
B) reduction and is exergonic
C) oxidation and is endergonic
D) oxidation and is exergonic
A

D

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4
Q 
Most energy during cell respiration is harvested during
A) the Krebs cycle
B) oxidative phosphorylation 
C) glycolysis
D) anaerobic respiration
A

B

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5
Q 
All of the following processes produce ATP EXCEPT
A) lactic acid formation
B) oxidative phosphorylation
C) glycolysis
D) he Krebs cycle
A

A

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6
Q 
After strenuous exercise, a muscle cell would contain decreases amounts of \_\_ and increased amounts of \_\_\_
A) glucose; ATP
B) ATP; glucose
C) ATP; lactic acid
D) lactic acid; ATP
A

C

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7
Q 
Glycolysis : 
Match the above process with its location:
A) the cristae membrane
B) cytoplasm
C) inner matrix of the mitochondria
A

B

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8
Q 
Electron transport chain -
Match the above process with its location:
A) the cristae membrane
B) cytoplasm
C) inner matrix of the mitochondria
A

A

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9
Q 
Krebs cycle - 
Match the above process with its location:
A) the cristae membrane
B) cytoplasm
C) inner matrix of the mitochondria
A

C

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10
Q

The three circles stages represent three major processes in aerobic respiration:
Glucose->process A->process B->process C-> CO2+H2O

Process C represents:
A) glycolysis
B) the Krebs cycle
C) the electron transport chain
D) substrate level phosphorylation
A

C

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11
Q 
Each NAD molecule carrying hydrogen to the electron transport chain can produce a maximum of \_\_\_ molecules of ATP?
A) 1
B) 2
C) 3
D) 4
A

C

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12
Q 
Which is true of aerobic respiration but not true of anaerobic respiration?
A) CO2 is produced
B) ATP is produced
C) water is produced
D) alcohol is produced
A

C

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13
Q

Which of the following is the most important thing that happens during aerobic respiration?
A) electrons move down the electron transport chain in a series of redox reactions
B) acetyl CoA enters the Krebs cycle
C) NAD carries hydrogen to the electron transport chain
D) ATP is produced

A

D

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14
Q 
The ATP produced during glycolysis is generated by which of the following?
A) the electron transport chai
B) substrate level phosphorylation
C) oxidative phosphorylation
D) chemiosmosis
A

B

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15
Q 
In addition to ATP, what is produced during glycolysis?
A) pyruvate and NADH
B) CO2 and H2O
C) CO2 and ethyl alcohol
D) CO2 and NADH
A

A

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16
Q 
Which of the following probably evolved first?
A) the Krebs cycle
B) oxidative phosphorylation
C) glycolysis
D the electron transport chain
A

C

17
Q

Which is an example of a feedback mechanism?
A) phosphofructokinase, an allosteric enzyme in glycolysis, is inhibited by ATP
B) lactic acid gets converted back to pyruvic acid in the human liver
C) ATP is produced in mitochondria as protons flow thru he ATP synthase channel
D) energy is released from glucose as it decomposes into CO2 and H2O

A

A

18
Q 
Which process of cell respiration is most closely associated with intracellular membranes?
A) oxidative phosphorylation
B) the Krebs cycle
C) glycolysis
D) substrate level phosphorylation
A

A

19
Q 
During cell respiration, most ATP is formed as a direct result of the net movement of
A) electrons flowing against a gradient
B) electrons flowing thru s channel
C) protons flowing thru a channel
D) protons flowing against a gradient
A

C

20
Q

Glycolysis is the first phase of aerobic cellular respiration. It is a complex, enzyme controlled set of reactions in which glucose molecules are broken down into pyruvate in the absence of oxygen. Although it does not produce much ATP, glycolysis is important because pyruvate is the raw material for the next phase of cellular respiration, which will ultimately produce large amounts of ATP by oxidative phosphorylation. One of the enzymes at the beginning of glycolysis is PFK, phosphofructokinase, an allosteric enzyme. When ATP binds to the allosteric site on PFK, the enzyme changes shape and no longer functions. Which of the following statements best explains the importance of the enzyme PFK in glycolysis?
A) PFK inhibits glycolysis when oxygen levels are high
B) PFK enables glycolysis to continue when no oxygen is present
C) PFK inhabits the production of ATP when ATP levels are high
D) PFK enhances the production of ATP when ATP levels are high

A

C

21
Q

The energy needed to form ATP via electron transport phosphorylation comes from the net movement of
A) glucose into the cell by facilitated diffusion
B) water molecules diffusing into an intracellular hypertonic environment
C) oxygen diffusing out of the cell
D) protons diffusing across a membrane with the concentration gradient

A

D

22
Q

What s the function of O2 n aerobic metabolism?
A) oxidizes glucose, making t more soluble in water
B) reduces enzymes, limiting glucose synthesis
C) activates enzymes in the citric acid (Krebs) cycle
D) accepts electrons thru the electron transport chain

A

D

23
Q

CO2 production can be used as measure of metabolic rate because
A) the heat from metabolism increases its partial pressure
B) CO2 is a waste product of the catabolism of glucose
C) a decreased cellular pH liberates gaseous CO2
D) plants need CO2 to complete photosynthesis

A

B

24
Q

Plants with C4 photosynthesis are more efficient than C3 plants at
A) binding CO2 and fixing carbon for light independent reactions
B) synthesizing carbon molecules into complex sugars
C) utilizing energy from ATPases that perform photophosphorylation
D) absorbing incident solar radiation

A

A

25
Q 
From an evolutionary perspective, the most primitive process in cellular energetics is most likely
A) fermentation
B) the critic acid (Krebs) cycle
C) the dark reactions in photosynthesis 
D) CAM reactions in photosynthesis
A

A

26
Q

Which of the following statements is true about both C4 plants and CAM plants?
A) they do not need ATP from the light dependent reactions
B) they have adapted systems for survival in cold, wet habitats
C) they provide alternatives for Co2 fixation
D) they produce more O2 than C3 plants

A

C

27
Q

Chemiosmosis is the process by which cells
A) obtain food by endocytosis
B) use an electrochemical gradient to produce energy
C) produced photo pigments in plastids
D) exchange complex molecules for water across the plasma membrane

A

B

28
Q

What is the role of the H atoms in water during photosynthesis?
A) they stabilize pH in the thylakoid matrix
B) they reduce the temperature of chloroplast
C) they magnify solar energy by refracting light waves
D) they split and combine with CO2 to make sugars and free O2

A

D

29
Q

C4 and CAM plants are more likely to have an advantage over C3 plants
A) in habitats with low sunlight and low temperature
B) in temperature climates with high rainfall
C) when soil nutrients are scarce
D) in semi-arid to arid habitats

A

D

30
Q 
The product(s) of light dependent reactions of photosynthesis is/are
A) pyruvate
B) glucose
C) ATP and NADPH
D) CO2 and H2O
A

C

31
Q 
How many ATP are produced via the chemiosmotic principle for every molecule of NADH that transfers high-energy electrons to the electron transport chain?
A) 1
B) 2
C) 3
D) 4
A

C

32
Q 
How many ATP are produced for every molecule of FADH2 that transfer high energy electrons to the electron transport chain?
A) 1
B) 2
C) 3
D) 4
A

B

33
Q 
Site of the light reactions refer to
A) stomata
B) cytoplasm
C) chlorophyll
D) thylakoid
A

D

34
Q 
Regulates entrance of CO2 refer to
A) stomata
B) cytoplasm
C) chlorophyll
D) thylakoid
A

A

AP Biology (8 decks)

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