Question 1

Engelmann (1883)discovered that the wavelengths of light that chlorophyll most strongly absorbed were

Accepted Answer

A) in the red-violet wavelengths of the visible light spectrum. 
B) in the green wavelength of the visible light spectrum. 
C) in the yellow-orange wavelengths of the visible light spectrum. 
D) in the ultraviolet wavelengths of the light spectrum. 
E) in the infrared wavelengths of the light spectrum. 
A) in the red-violet wavelengths of the visible light spectrum. 
B) in the green wavelength of the visible light spectrum. 
C) in the yellow-orange wavelengths of the visible light spectrum. 
D) in the ultraviolet wavelengths of the light spectrum. 
E) in the infrared wavelengths of the light spectrum.

Question 2

The loss of carbon fixing activity of the enzyme RuBP carboxylase is directly proportional to

Accepted Answer

A) high temperatures and high light intensities. 
B) low temperature and low light intensities. 
C) completely dark conditions. 
D) lack of carbon dioxide. 
E) lack of oxygen. 
A) high temperatures and high light intensities. 
B) low temperature and low light intensities. 
C) completely dark conditions. 
D) lack of carbon dioxide. 
E) lack of oxygen.

Question 3

Most of the atmospheric oxygen occurs as a result of photosynthesis.From which of the following molecules is the oxygen derived?

Accepted Answer

A) water 
B) carbon dioxide 
C) glucose 
D) chlorophyll 
A) water 
B) carbon dioxide 
C) glucose 
D) chlorophyll

Question 4

Embedded in the thylakoid membrane and protruding as knobs from the outer surface into the stroma,there are

Accepted Answer

A) enzymes that fix carbon dioxide. 
B) proton channels that synthesize ATP. 
C) chlorophyll a and b. 
D) P680 and P700. 
E) specialized bundle sheath cells. 
A) enzymes that fix carbon dioxide. 
B) proton channels that synthesize ATP. 
C) chlorophyll a and b. 
D) P680 and P700. 
E) specialized bundle sheath cells.

Question 5

Carotenoids are important to many plants because these pigments are able to

Accepted Answer

A) remove carbon dioxide from the air. 
B) absorb wavelengths of light that neither chlorophyll a nor b can absorB. 
C) absorb water so that hydrolysis can be carried out in the chloroplasts. 
D) capture UV radiation that is harmful to the DNA in the nucleus of plant cells. 
E) store electrons for use during the "dark" reaction of photosynthesis. 
A) remove carbon dioxide from the air. 
B) absorb wavelengths of light that neither chlorophyll a nor b can absorB. 
C) absorb water so that hydrolysis can be carried out in the chloroplasts. 
D) capture UV radiation that is harmful to the DNA in the nucleus of plant cells. 
E) store electrons for use during the "dark" reaction of photosynthesis.

Question 6

Under what circumstances would increasing light intensity not result in an increase in the rate of photosynthesis?

Accepted Answer

A) At any given time,the rate of photosynthesis is limited by the factor which is in the shortest supply.Therefore,if a factor other than light is limited,increasing the light intensity would not result in an increase in the rate of photosynthesis. 
B) At any given time,the rate of photosynthesis is limited by the factor which is in the greatest supply.Therefore,if a factor other than light is in surplus,increasing the light intensity would not result in an increase in the rate of photosynthesis. 
C) At any given time,the rate of photosynthesis is at its peak.Therefore,increasing the light intensity would not result in an increase in the rate of photosynthesis. 
A) At any given time,the rate of photosynthesis is limited by the factor which is in the shortest supply.Therefore,if a factor other than light is limited,increasing the light intensity would not result in an increase in the rate of photosynthesis. 
B) At any given time,the rate of photosynthesis is limited by the factor which is in the greatest supply.Therefore,if a factor other than light is in surplus,increasing the light intensity would not result in an increase in the rate of photosynthesis. 
C) At any given time,the rate of photosynthesis is at its peak.Therefore,increasing the light intensity would not result in an increase in the rate of photosynthesis.

Question 7

_______ adapted plants such as cacti,pineapples,etc.show a pattern of stomatal opening and closing that is the reverse of C3 plants.

Accepted Answer

A) C3 
B) Arctic 
C) CAM 
D) Calvin cycle 
A) C3 
B) Arctic 
C) CAM 
D) Calvin cycle

Question 8

In the photosystem I photocenter,light energy captured by pigment molecules is passed on to a special molecule called

Accepted Answer

A) P680. 
B) P700. 
C) chlorophyll I. 
D) chlorophyll II. 
E) retinal. 
A) P680. 
B) P700. 
C) chlorophyll I. 
D) chlorophyll II. 
E) retinal.

Question 9

The connection between carrots and vision is that the $\beta$-carotene of carrots can produce two molecules of vitamin A and oxidation of vitamin A produces a pigment used in vertebrate vision.This pigment's name is

Accepted Answer

A) chlorophyll. 
B) ferredoxin. 
C) cytochrome. 
D) carotene. 
E) retinal. 
A) chlorophyll. 
B) ferredoxin. 
C) cytochrome. 
D) carotene. 
E) retinal.

Question 10

Your research project involves a mutational analysis of the light harvesting complex Lhca1.Your labmate asks if you are working on a cytochrome found in the outer membrane of the chloroplast.You explain that:

Accepted Answer

A) Yes,I am working on a cytochrome located in the outer chloroplast membrane. 
B) I am working on a cytochrome,but it is located in the thylakoid membrane,not the outer chloroplast membrane. 
C) I am working on a protein found in the antenna complex and it is located in the thylakoid membrane. 
D) Although it is located in the outer membrane of the chloroplast,I am working on a protein found in the antenna complex. 
A) Yes,I am working on a cytochrome located in the outer chloroplast membrane. 
B) I am working on a cytochrome,but it is located in the thylakoid membrane,not the outer chloroplast membrane. 
C) I am working on a protein found in the antenna complex and it is located in the thylakoid membrane. 
D) Although it is located in the outer membrane of the chloroplast,I am working on a protein found in the antenna complex.

Question 11

Photosystem II differs from photosystem I in that _____________ is not made directly from the process.

Accepted Answer

A) ATP 
B) NADH 
C) NADPH 
D) carbohydrates 
E) water 
A) ATP 
B) NADH 
C) NADPH 
D) carbohydrates 
E) water

Question 12

Which of the following is common to both cellular respiration and the light reactions of photosynthesis?

Accepted Answer

A) the transfer of electrons to glucose 
B) the chemiosmotic formation of ATP 
C) oxygen is one of the byproducts 
D) mitochondria are essential organelles 
E) must have light 
A) the transfer of electrons to glucose 
B) the chemiosmotic formation of ATP 
C) oxygen is one of the byproducts 
D) mitochondria are essential organelles 
E) must have light

Exam 8: Photosynthesis

Engelmann (1883)discovered that the wavelengths of light that chlorophyll most strongly absorbed were

The loss of carbon fixing activity of the enzyme RuBP carboxylase is directly proportional to

Most of the atmospheric oxygen occurs as a result of photosynthesis.From which of the following molecules is the oxygen derived?

Embedded in the thylakoid membrane and protruding as knobs from the outer surface into the stroma,there are

Carotenoids are important to many plants because these pigments are able to

Under what circumstances would increasing light intensity not result in an increase in the rate of photosynthesis?

_______ adapted plants such as cacti,pineapples,etc.show a pattern of stomatal opening and closing that is the reverse of C3 plants.

In the photosystem I photocenter,light energy captured by pigment molecules is passed on to a special molecule called

The connection between carrots and vision is that the β\betaβ -carotene of carrots can produce two molecules of vitamin A and oxidation of vitamin A produces a pigment used in vertebrate vision.This pigment's name is

Your research project involves a mutational analysis of the light harvesting complex Lhca1.Your labmate asks if you are working on a cytochrome found in the outer membrane of the chloroplast.You explain that:

Photosystem II differs from photosystem I in that _____________ is not made directly from the process.

Which of the following is common to both cellular respiration and the light reactions of photosynthesis?

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_______ adapted plants such as cacti,pineapples,etc.show a pattern of stomatal opening and closing that is the reverse of C₃ plants.

The connection between carrots and vision is that the $\beta$ -carotene of carrots can produce two molecules of vitamin A and oxidation of vitamin A produces a pigment used in vertebrate vision.This pigment's name is