Exam 4

Question 1

What is the term for metabolic pathways that release stored energy by breaking down complex molecules?

Answer 1

Catabolic pathways

Question 2

What is the term used for the metabolic pathway in which glucose is degraded in the presence of oxygen to carbon dioxide and water?

Answer 2

Cellular respiration

Question 3

Which of the following statements are correct about an oxidation reduction reaction?

Answer 3

A and B are correct

Question 4

Which statement is not correct with regard to redox reaction’s?

Answer 4

A molecule is reduced if it loses electrons

Question 5

The molecule that functions as the reducing agent and a redox or oxidation reduction reaction

Answer 5

Loses electrons and loses energy

Question 6

Which of the following statements describes the results of this reaction?

Answer 6

C6H12O6 is oxidized and O2 is reduced

Question 7

When a glucose molecule loses a hydrogen Adam as a result of an oxidation reduction reaction the molecule becomes

Answer 7

Oxidized

Question 8

When a molecule of NAD+ Gains a hydrogen atom the molecule becomes

Answer 8

Reduced

Question 9

Where does glycolysis take place

Answer 9

Cytosol

Question 10

The ATP made during glycolysis is generated by

Answer 10

Substrate level phosphorylation

Question 11

Which process and eukaryotic cells will proceed normally weather oxygen is present or absent

Answer 11

Glycolysis

Question 12

Substrate level phosphorylation accounts for approximately what percentage of the ATP formed during glycolysis?

Answer 12

100%

Question 13

In addition to ATP, what are the end products of glycolysis

Answer 13

NADH and pyruvate

Question 14

Starting with one molecule of glucose, the net products of glycolysis are

Answer 14

2 NADH, 2 H+, 2 pyruvate, 2 ATP, and 2 H2O

Question 15

In glycolysis, for each molecule of glucose oxidized to pyruvate

Answer 15

2 molecules of ATP are used and 4 molecules of ATP are produced

Question 16

Which of the following intermediary metabolites enters the citric acid cycle and is formed, in part, by the removal of a carbon from one molecule of pyruvate?

Answer 16

Acetyl COA

Question 17

Where in cellular respiration acetyl COA accumulates in which location?

Answer 17

Mitochondrial matrix

Question 18

Cellular respiration harvest the most chemical energy from which of the following

Answer 18

Chemiosmotic phosphorylation

Question 19

During aerobic respiration, electrons travel down hill in which sequence?

Answer 19

Food –> NADH –> electron transport chain –> oxygen

Question 20

Where do you catabolic products of fatty acid break down enter into the citric acid cycle

Answer 20

Acetyl COA

Question 21

The primary role of oxygen in cellular respiration is to

Answer 21

Act as in a scepter for electrons and hydrogen, forming water

Question 22

Inside an active mitochondrion, most electrons flow which pathway?

Answer 22

Citric acid cycle –> NADH –> electron transport chain –> oxygen

Question 23

Approximately what percentage of the energy of glucose is transferred to stored in ATP as a result of the complete oxidation of glucose to CO2 and water in cellular respiration?

Answer 23

40%

Question 24

Fermentation takes place in the

Answer 24

Mitochondrial inner

Question 25

Muscle cells in oxygen deprivation convert pyruvate to___, and in this step gain___

Answer 25

Lactate; NAD+

Question 26

In the absence of oxygen, yeast cells can obtain energy by fermentation, resulting in the production of

Answer 26

ATP, CO2, and ethanol

Question 27

In alcohol fermentation, NAD+ is regenerated from NADH during the

Answer 27

Reduction of acetylaldehyde to ethanol

Question 28

The final electron The scepter of the electron transport chain that functions in oxidative phosphorylation is

Answer 28

Oxygen

Question 29

Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle

Answer 29

ATP and NADPH

Question 30

Where does the Calvin cycle take place?

Answer 30

Stroma of the chloroplast

Question 31

The Reaction Center, Chlorophyll of photosystem one is known as P 700 because

Answer 31

The pigment is best at absorbing light with a wavelength of 700nm

Question 32

What are the products of noncyclic phosphorylation?

Answer 32

ATP and NADPH

Question 33

What does cyclic electron flow in the chloroplast produce

Answer 33

A, B, and C

Question 34

Where do the enzymatic reactions of Calvin cycle take place?

Answer 34

Stroma of the chloroplast

Question 35

What is the primary function of the cell cycle?

Answer 35

Synthesize simple sugars from carbon dioxide

Question 36

Which of the following is required in the Calvin

Answer 36

A, B, and C

Question 37

One carbon dioxide molecule reacts in each turn of the Calvin cycle. How many turns of the cycle are required for the synthesis of one glucose molecule?

Answer 37

6

Question 38

The plant that Inc. CO2 first into ocaloacetate can be best characterized as a

Answer 38

C4 plants

Question 39

CAM Plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they

Answer 39

Fix CO2 into organic acids during the night

Question 40

C4 plants differ from C3 and CAM Plants in that C4 plants

Answer 40

Transfer fixed carbon dioxide to cells in which the Calvin cycle occurs

Question 41

Synthesis of ATP by the chemiosmotic mechanism

Answer 41

Both photosynthesis and respiration

Question 42

Reduction of oxygen which forms water

Answer 42

Respiration

Question 43

Reduction of NADP+

Answer 43

Photosynthesis

Question 44

The splitting of carbon dioxide to form oxygen gas and carbon compounds

Answer 44

Both photosynthesis and respiration

Question 45

Generation of proton gradients across membranes

Answer 45

Both photosynthesis and respiration

Question 46

Produces molecular oxygen

Answer 46

Light reactions alone

Question 47

Requires ATP

Answer 47

The Calvin cycle alone

Question 48

Produces NADH

Answer 48

Neither the light reactions nor the Calvin cycle

Question 49

Produces NADPH

Answer 49

Light reactions alone