Question 1

In plants, light energy channeled to PSII and PSI drives electron transport through a series of electron carriers. At the same time, protons are translocated into the .

Accepted Answer

A)  stroma 
B)  lumen 
C)  granum 
D)  plasma membrane 
A)  stroma 
B)  lumen 
C)  granum 
D)  plasma membrane B

Question 2

Which statement is false about C4 plants?

Accepted Answer

A)  They tend to grow at high temperatures and high light intensities. 
B)  They decrease the ratio of CO2 to O2 in cells where Rubisco is active. 
C)  Corn is an example of a C4 plant. 
D)  They avoid wasteful photorespiration by means of secondary pathways for carbon dioxide fixation. 
A)  They tend to grow at high temperatures and high light intensities. 
B)  They decrease the ratio of CO2 to O2 in cells where Rubisco is active. 
C)  Corn is an example of a C4 plant. 
D)  They avoid wasteful photorespiration by means of secondary pathways for carbon dioxide fixation. B

Question 3

Which molecule is the CO2 acceptor in the first step of the Calvin cycle?

Accepted Answer

A)  rubisco 
B)  ribulose 1,5-bisphosphate 
C)  3-phosphoglycerate 
D)  glyceraldehyde-3-phosphate 
A)  rubisco 
B)  ribulose 1,5-bisphosphate 
C)  3-phosphoglycerate 
D)  glyceraldehyde-3-phosphate B

Question 4

Photosystems I and II are located in the same region of the chloroplast structure, since both contain chlorophyll.

Accepted Answer

A) True 
 B)False

Question 5

The round (R) and wrinkled (r) peas studied by Gregor Mendel differ in the gene for starch branching enzyme.

Accepted Answer

A) True 
 B)False

Question 6

Both the C4 and CAM carbon-assimilation pathways use bicarbonate ions to convert phosphoenolpyruvate to oxaloacetate.

Accepted Answer

A) True 
 B)False

Question 7

Rubisco often makes up to 50% of the soluble protein in plant leaves.

Accepted Answer

A) True 
 B)False

Question 8

The main difference between photosynthesis and respiratory electron transport is

Accepted Answer

A)  the tetrapyrolle ring of the pigments involved. 
B)  the coenzymes that carry electrons. 
C)  the sources of electrons. 
D)  the formation of ATP. 
A)  the tetrapyrolle ring of the pigments involved. 
B)  the coenzymes that carry electrons. 
C)  the sources of electrons. 
D)  the formation of ATP.

Question 9

Which enzyme is not part of the Calvin cycle?

Accepted Answer

A)  triose phosphate isomerase 
B)  rubisco 
C)  plastocyanin 
D)  transketolase 
A)  triose phosphate isomerase 
B)  rubisco 
C)  plastocyanin 
D)  transketolase

Question 10

The C4 pathway helps increase the concentration of carbon dioxide in the bundle sheath cells. This is important because the cell walls of these cells are impermeable to gases.

Accepted Answer

A) True 
 B)False

Question 11

The light reactions of photosynthesis form carbohydrates from ATP, NADPH, H+ and CO2.

Accepted Answer

A) True 
 B)False

Question 12

Which is not a name for the reactions of the Calvin cycle?

Accepted Answer

A)  proton translocation cycle 
B)  reductive pentose phosphate cycle 
C)  C3 pathway 
D)  dark reactions 
A)  proton translocation cycle 
B)  reductive pentose phosphate cycle 
C)  C3 pathway 
D)  dark reactions

Question 13

Within the chloroplast, grana are .

Accepted Answer

A)  stacks of enfolded thylakoid membrane 
B)  the stroma 
C)  stromal lamellae 
D)  the site of carbon fixation reactions 
A)  stacks of enfolded thylakoid membrane 
B)  the stroma 
C)  stromal lamellae 
D)  the site of carbon fixation reactions

Question 14

Although a variety of pigments absorb light, only the special pair of chlorophyll molecules at photosystems I and II can become activated and thereby provide electrons for transport.

Accepted Answer

A) True 
 B)False

Question 15

Phycoerythrin and β-carotene absorb light in ranges broader than that absorbed by chlorophylls, and this light energy is ultimately used by the plant for photosynthesis.

Accepted Answer

A) True 
 B)False

Question 16

In cacti accumulates in the cell vacuoles at night that is released in the day and decarboxylated.

Accepted Answer

A)  phosphoenolpyruvate 
B)  malate 
C)  oxaloacetate 
D)  bicarbonate ion 
A)  phosphoenolpyruvate 
B)  malate 
C)  oxaloacetate 
D)  bicarbonate ion

Question 17

Which term is not used for a photosystem or a part of a photosystem?

Accepted Answer

A)  PS I 
B)  PS II 
C)  special pair 
D)  light complexes 
E)  antenna pigments 
A)  PS I 
B)  PS II 
C)  special pair 
D)  light complexes 
E)  antenna pigments

Question 18

In terrestrial plants diffusion of carbon dioxide into plant leaves is controlled by the stomata.

Accepted Answer

A) True 
 B)False

Question 19

Which is not an intermediate in the biosynthesis of sucrose in plants?

Accepted Answer

A)  ADP-glucose 
B)  glucose 6-phosphate 
C)  fructose 6-phosphate 
D)  fructose 1,6-bisphosphate 
A)  ADP-glucose 
B)  glucose 6-phosphate 
C)  fructose 6-phosphate 
D)  fructose 1,6-bisphosphate

Question 20

Two interdependent processes which comprise photosynthesis are 1) the formation of carbohydrates from CO2 and 2) the formation of .

Accepted Answer

A)  ADP 
B)  ATP 
C)  NAD+  
D)  NADPH 
E)  B and D 
A)  ADP 
B)  ATP 
C)  NAD+  
D)  NADPH 
E)  B and D

Exam 15: Photosynthesis

In plants, light energy channeled to PSII and PSI drives electron transport through a series of electron carriers. At the same time, protons are translocated into the .

Which statement is false about C4 plants?

Which molecule is the CO2 acceptor in the first step of the Calvin cycle?

Photosystems I and II are located in the same region of the chloroplast structure, since both contain chlorophyll.

The round (R) and wrinkled (r) peas studied by Gregor Mendel differ in the gene for starch branching enzyme.

Both the C4 and CAM carbon-assimilation pathways use bicarbonate ions to convert phosphoenolpyruvate to oxaloacetate.

Rubisco often makes up to 50% of the soluble protein in plant leaves.

The main difference between photosynthesis and respiratory electron transport is

Which enzyme is not part of the Calvin cycle?

The C4 pathway helps increase the concentration of carbon dioxide in the bundle sheath cells. This is important because the cell walls of these cells are impermeable to gases.

The light reactions of photosynthesis form carbohydrates from ATP, NADPH, H+ and CO2.

Which is not a name for the reactions of the Calvin cycle?

Within the chloroplast, grana are .

Although a variety of pigments absorb light, only the special pair of chlorophyll molecules at photosystems I and II can become activated and thereby provide electrons for transport.

Phycoerythrin and β-carotene absorb light in ranges broader than that absorbed by chlorophylls, and this light energy is ultimately used by the plant for photosynthesis.

In cacti accumulates in the cell vacuoles at night that is released in the day and decarboxylated.

Which term is not used for a photosystem or a part of a photosystem?

In terrestrial plants diffusion of carbon dioxide into plant leaves is controlled by the stomata.

Which is not an intermediate in the biosynthesis of sucrose in plants?

Two interdependent processes which comprise photosynthesis are 1) the formation of carbohydrates from CO2 and 2) the formation of .

Introduction to Biochemistry

Water

Amino Acids and the Primary Structures of Proteins

Proteins: Three-Dimensional Structure and Function

Properties of Enzymes

Mechanisms of Enzymes

Coenzymes and Vitamins

Carbohydrates

Lipids and Membranes

Introduction to Metabolism

Glycolysis

Gluconeogenesis, the Pentose Phosphate Pathway, and Glycogen Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Nucleic Acids

Dna Replication, Repair, and Recombination

Transcription and Rna Processing

Protein Synthesis

Recombinant Dna Technology

Filters

Which statement is false about C₄plants?

Which molecule is the CO₂acceptor in the first step of the Calvin cycle?

Both the C₄and CAM carbon-assimilation pathways use bicarbonate ions to convert phosphoenolpyruvate to oxaloacetate.

The C₄pathway helps increase the concentration of carbon dioxide in the bundle sheath cells. This is important because the cell walls of these cells are impermeable to gases.

The light reactions of photosynthesis form carbohydrates from ATP, NADPH, H⁺and CO₂.

Two interdependent processes which comprise photosynthesis are 1) the formation of carbohydrates from CO₂and 2) the formation of .