Photosynthesis in Higher Plants Test

Question 1
1 / -0

Photosynthesis may be studied in a number of ways. For this protocol, a dye-reduction technique is used. This dye-reduction investigation tests the hypothesis that light and chloroplasts are required for the light reactions to occur. A compound, DPIP (2,6-dichlorophenol-indophenol), will be substituted so that when a reduction reaction has occurred, the DPIP changes from blue to colorless.
In this experiment, chloroplasts are extracted from spinach leaves and incubated with DPIP in the presence of light. As the DPIP is reduced and becomes colorless, the resultant increase in light transmittance (at 605 nm, the A $_{max}$ of blue DPIP) is measured over a period of time using a spectrophotometer.
Which molecule does DPIP replace in the light reactions of photosynthesis?

A
Chlorophyll

B
ATP

C
Ferredoxin

D
NADP $^+$

Question 2
1 / -0

By which of the following processes ATP is produced?
I. Photosynthesis
II. Aerobic respiration
III. Anaerobic respiration

A
I only

B
II only

C
I and III only

D
II and III only

E
I, II, and III

Question 3
1 / -0

Read the passage and answer the following question.
An experiment is set up with a culture of algae undergoing normal photosynthesis. A pulse of radioactive carbon, in the form of $^{14}$ CO $_2$ , is inserted into the culture at time zero. At five second intervals, some of the cells are removed by dropping them into boiling water to halt metabolic processes.
The first organic material that would be identified as being radioactive during this process is

A
ATP

B
PGA

C
ADP

D
Glucose

E
Acetyl CoA

Question 4
1 / -0

The curve showing the amount of light absorbed at each wavelength is called

A
Action spectrum

B
Absorption spectrum

C
Quantum yield

D
Quantum requirement

Question 5
1 / -0

Chlorophyll molecules are essential for photosynthesis, and allow plants, fungi, and some bacteria to capture free energy from light and convert it into chemical energy.
An absorption spectrum illustrates the amount of light energy absorbed across a range of wavelengths , and the graph below represents the absorption spectra of chlorophyll a and chlorophyll b pigment molecules in a plant cell. The relative absorption rates of chlorophyll a and chlorophyll b indicate that

A
Blue light would provide for the highest rate of photosynthesis, producing glucose in plant cells at a faster rate than other wavelengths of light

B
Both chlorophyll a and chlorophyll b will drive the highest rate of photosynthesis between 500 nm - 600 nm, which explains why green light is the ideal light source for plants

C
Chlorophyll b absorbs only blue light and chlorophyll a absorbs only red light, and natural selection has favored photosynthetic systems that do not use all the visible light wavelengths because this would provide too much energy to the organism

D
Relative rates of photosynthesis are constant across the range of range of visible light wavelengths, as this ensures that plants and other autotrophs can convert free energy into glucose at a constant rate

Question 6
1 / -0

Choose the correct statement that explains the role of CAM (Crassulacean Acid Metabolism) in plants?

A
CAM allows plants to produce more glucose from a given amount of raw material

B
CAM allows plants to carry out photosynthesis without the use of water

C
CAM allows plants to take in carbon dioxide at night instead of during the day

D
CAM allows plants to keep their stomata open at all times

E
CAM allows plants to conserve energy in cold climates

Question 7
1 / -0

Chemiosmotic theory of ATP synthesis in mitochondria is based on

A
K $^+$ gradient.

B
H $^+$ gradient.

C
Na $^+$ gradient.

D
Ca $^{2+}$ gradient.

Question 8
1 / -0

Coupling factor- F occurs over

A
Ribosome

B
Stroma

C
Matrix

D
Thylakoids

Question 9
1 / -0

The spaces inside the folds of ER membrane are known as

A
Thylakoids

B
Cisternae

C
Mesosomes

D
Periplasmic space

Question 10
1 / -0

How many are autotrophs : Lactobacillus, Nostoc, Chara, Nitrosomonas, Streptomyces, Saccharomyces, Trypanosoma, Porphyra, Wolffia?

A
Four

B
Five

C
Six

D
Three

Submit Test

I.	Photosynthesis
II.	Aerobic respiration
III.	Anaerobic respiration

Photosynthesis ...

Question 1

Chlorophyll

ATP

Ferredoxin

NADP+^++

Question 2

I only

II only

I and III only

II and III only

I, II, and III

Question 3

ATP

PGA

ADP

Glucose

Acetyl CoA

Question 4

Action spectrum

Absorption spectrum

Quantum yield

Quantum requirement

Question 5

Blue light would provide for the highest rate of photosynthesis, producing glucose in plant cells at a faster rate than other wavelengths of light

Both chlorophyll a and chlorophyll b will drive the highest rate of photosynthesis between 500 nm - 600 nm, which explains why green light is the ideal light source for plants

Chlorophyll b absorbs only blue light and chlorophyll a absorbs only red light, and natural selection has favored photosynthetic systems that do not use all the visible light wavelengths because this would provide too much energy to the organism

Relative rates of photosynthesis are constant across the range of range of visible light wavelengths, as this ensures that plants and other autotrophs can convert free energy into glucose at a constant rate

Question 6

CAM allows plants to produce more glucose from a given amount of raw material

CAM allows plants to carry out photosynthesis without the use of water

CAM allows plants to take in carbon dioxide at night instead of during the day

CAM allows plants to keep their stomata open at all times

CAM allows plants to conserve energy in cold climates

Question 7

K+^++ gradient.

H+^++ gradient.

Na+^++ gradient.

Ca2+^{2+}2+ gradient.

Question 8

Ribosome

Stroma

Matrix

Thylakoids

Question 9

Thylakoids

Cisternae

Mesosomes

Periplasmic space

Question 10

Four

Five

Six

Three

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Question Analysis

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NADP $^+$

K $^+$ gradient.

H $^+$ gradient.

Na $^+$ gradient.

Ca $^{2+}$ gradient.