Question 1

What did the radioactive molecules represent?

Accepted Answer

A) Calvin cycle enzymes used in the Calvin 
B) carbon compounds produced in the Calvin cycle 
C) cellular debris from Chlorella 
D) carbon dioxide gas 
A) Calvin cycle enzymes used in the Calvin 
B) carbon compounds produced in the Calvin cycle 
C) cellular debris from Chlorella 
D) carbon dioxide gas

Question 2

The Calvin cycle requires all of the following except

Accepted Answer

A) carbon dioxide. 
B) oxygen. 
C) ATP. 
D) NADPH. 
E) water. 
A) carbon dioxide. 
B) oxygen. 
C) ATP. 
D) NADPH. 
E) water.

Question 3

Emerson and colleagues discovered the enhancement effect while studying photosynthesis in green algae.The algae were illuminated with light of either 680 nm or 700 nm,and the rate of photosynthesis was measured.The researchers found that the rate of photosynthesis when the lights were applied simultaneously was greater than the sum of the rates when the lights were applied individually.These results provided evidence that

Accepted Answer

A) photosynthesis is carried out by two photosystems that act in parallel. 
B) photosynthesis is carried out by two photosystems that act in series. 
C) photosynthesis is carried out by two photosystems that work best at a wavelength of 690 nm. 
D) photosynthesis is enhanced by the use of two photosystems. 
A) photosynthesis is carried out by two photosystems that act in parallel. 
B) photosynthesis is carried out by two photosystems that act in series. 
C) photosynthesis is carried out by two photosystems that work best at a wavelength of 690 nm. 
D) photosynthesis is enhanced by the use of two photosystems.

Question 4

Visible light has a wavelength range of

Accepted Answer

A) 400-700 nanometers. 
B) 200-800 nanometers. 
C) 200-400 nanometers. 
D) 200-700 nanometers. 
E) 0.001-100,000 nanometers. 
A) 400-700 nanometers. 
B) 200-800 nanometers. 
C) 200-400 nanometers. 
D) 200-700 nanometers. 
E) 0.001-100,000 nanometers.

Question 5

The dark reactions of photosynthesis are those that

Accepted Answer

A) convert chlorophylls into enzymes. 
B) convert enzymes into chlorophylls. 
C) convert water into hydrogen and oxygen. 
D) convert CO2 into reduced molecules (sugars). 
E) only occur in the dark. 
A) convert chlorophylls into enzymes. 
B) convert enzymes into chlorophylls. 
C) convert water into hydrogen and oxygen. 
D) convert CO2 into reduced molecules (sugars). 
E) only occur in the dark.

Question 6

The general process whereby protons accumulate on one side of a membrane and can flow back across the membrane through ATP synthase resulting in ATP production is called _________________.

Accepted Answer

A) chemiosmosis 
B) ATP synthesis 
C) diffusion 
D) active transport 
A) chemiosmosis 
B) ATP synthesis 
C) diffusion 
D) active transport

Question 7

In which part of the chloroplasts are the Calvin cycle enzymes located?

Accepted Answer

A) stroma 
B) thylakoids 
C) grana 
D) envelope 
E) cristae 
A) stroma 
B) thylakoids 
C) grana 
D) envelope 
E) cristae

Question 8

The cyclic carbon fixation reactions are also known as the

Accepted Answer

A) Krebs cycle. 
B) Calvin cycle. 
C) citric acid cycle. 
D) tri carboxylic acid cycle. 
E) Blackman cyclE. 
A) Krebs cycle. 
B) Calvin cycle. 
C) citric acid cycle. 
D) tri carboxylic acid cycle. 
E) Blackman cyclE.

Question 9

A scientist is hoping to synthesize a new herbicide that will kill certain weeds.She has found that one weed species in particular has thylakoids that have rather large pores.The herbicide will open the pores of these thylakoids,causing them to leak

Accepted Answer

A) stromal enzymes. 
B) chlorophyll. 
C) ATP. 
D) glucose. 
E) NADPH. 
A) stromal enzymes. 
B) chlorophyll. 
C) ATP. 
D) glucose. 
E) NADPH.

Question 10

The photosystem channels the excitation energy gathered by absorption of light by any one of the pigment molecules to a specific "reaction center chlorophyll," which in turn passes the energy to

Accepted Answer

A) photosystem I. 
B) photosystem II. 
C) the primary electron acceptor. 
D) the secondary electron center. 
E) cytochromE. 
A) photosystem I. 
B) photosystem II. 
C) the primary electron acceptor. 
D) the secondary electron center. 
E) cytochromE.

Question 11

__________ is the process by which certain organisms capture energy from sunlight and use it to build energy-rich food molecules.

Accepted Answer

A) Metabolism 
B) Photosynthesis 
C) Respiration 
D) Energy 
A) Metabolism 
B) Photosynthesis 
C) Respiration 
D) Energy

Question 12

During electron transport,the thylakoid space becomes

Accepted Answer

A) the site of ATP synthesis. 
B) the site of NADPH production. 
C) less acidic than the stroma. 
D) more acidic than the stroma. 
A) the site of ATP synthesis. 
B) the site of NADPH production. 
C) less acidic than the stroma. 
D) more acidic than the stroma.

Question 13

Carbon atoms of CO2 are incorporated into organic molecules in a series of dark reactions called

Accepted Answer

A) carbon reduction. 
B) carbon synthesis. 
C) carbon fixation. 
D) carbon activation. 
E) carbon oxidation. 
A) carbon reduction. 
B) carbon synthesis. 
C) carbon fixation. 
D) carbon activation. 
E) carbon oxidation.

Question 14

Sunburn is caused by which component of sunlight?

Accepted Answer

A) infrared rays 
B) X rays 
C) gamma rays 
D) ultra violet rays 
E) long wavelength rays 
A) infrared rays 
B) X rays 
C) gamma rays 
D) ultra violet rays 
E) long wavelength rays

Question 15

If you exposed a C4 plant to 14CO2 in the light,which of the following would be the first organic molecule labeled with 14C?

Accepted Answer

A) oxaloacetate 
B) malate 
C) pyruvate 
D) phosphoenolpyruvate (PEP) 
A) oxaloacetate 
B) malate 
C) pyruvate 
D) phosphoenolpyruvate (PEP)

Question 16

Even though the Calvin cycle reactions require the products of the light reactions,its reactions can occur in the ________.

Accepted Answer

A) light 
B) dark 
C) root 
D) cold 
A) light 
B) dark 
C) root 
D) cold

Question 17

Fall leaf color on deciduous trees is a result of

Accepted Answer

A) the production of more accessory pigments because of the cooler temperatures. 
B) the reduction in the production of accessory pigments because of the cooler temperatures. 
C) cessation of chlorophyll production,which allows the accessory pigments to be revealed. 
D) the increased angle of the sun during the fall,which reflects more of the accessory pigments causing the human eye to see the red,yellow,and orange colors that were masked by the green chlorophyll. 
A) the production of more accessory pigments because of the cooler temperatures. 
B) the reduction in the production of accessory pigments because of the cooler temperatures. 
C) cessation of chlorophyll production,which allows the accessory pigments to be revealed. 
D) the increased angle of the sun during the fall,which reflects more of the accessory pigments causing the human eye to see the red,yellow,and orange colors that were masked by the green chlorophyll.

Question 18

Most plants incorporate carbon dioxide into sugars by means of a cycle of reactions called the

Accepted Answer

A) CAM cycle. 
B) carbon cycle. 
C) Calvin cycle. 
D) Krebs cycle. 
E) electron transport cyclE. 
A) CAM cycle. 
B) carbon cycle. 
C) Calvin cycle. 
D) Krebs cycle. 
E) electron transport cyclE.

Question 19

Visible light not strongly absorbed by chlorophyls.

Accepted Answer

A) green 
B) violet-blue 
C) red 
D) ultraviolet 
E) yellow-orange 
A) green 
B) violet-blue 
C) red 
D) ultraviolet 
E) yellow-orange

Question 20

In the plants that utilize the CAM pathway,what happens to the stomata?

Accepted Answer

A) The stomata open in the afternoon but close as soon as the sun sets. 
B) The stomata open in the morning but close in the afternoon. 
C) The stomata open in the evening but close in the morning. 
D) The stomata open only when the sun is shining and close at night. 
A) The stomata open in the afternoon but close as soon as the sun sets. 
B) The stomata open in the morning but close in the afternoon. 
C) The stomata open in the evening but close in the morning. 
D) The stomata open only when the sun is shining and close at night.

Exam 8: Photosynthesis

What did the radioactive molecules represent?

The Calvin cycle requires all of the following except

Visible light has a wavelength range of

The dark reactions of photosynthesis are those that

The general process whereby protons accumulate on one side of a membrane and can flow back across the membrane through ATP synthase resulting in ATP production is called _________________.

In which part of the chloroplasts are the Calvin cycle enzymes located?

The cyclic carbon fixation reactions are also known as the

A scientist is hoping to synthesize a new herbicide that will kill certain weeds.She has found that one weed species in particular has thylakoids that have rather large pores.The herbicide will open the pores of these thylakoids,causing them to leak

The photosystem channels the excitation energy gathered by absorption of light by any one of the pigment molecules to a specific "reaction center chlorophyll," which in turn passes the energy to

__________ is the process by which certain organisms capture energy from sunlight and use it to build energy-rich food molecules.

During electron transport,the thylakoid space becomes

Carbon atoms of CO2 are incorporated into organic molecules in a series of dark reactions called

Sunburn is caused by which component of sunlight?

If you exposed a C4 plant to 14CO2 in the light,which of the following would be the first organic molecule labeled with 14C?

Even though the Calvin cycle reactions require the products of the light reactions,its reactions can occur in the ________.

Fall leaf color on deciduous trees is a result of

Most plants incorporate carbon dioxide into sugars by means of a cycle of reactions called the

Visible light not strongly absorbed by chlorophyls.

In the plants that utilize the CAM pathway,what happens to the stomata?

The Science of Biology

The Nature of Molecules

The Chemical Building Blocks of Life

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Carbon atoms of CO₂ are incorporated into organic molecules in a series of dark reactions called

If you exposed a C₄ plant to ¹⁴CO₂ in the light,which of the following would be the first organic molecule labeled with ¹⁴C?