Chapter 6

Mader's Concepts in Biology, First Edition

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Sylvia S. Mader

Chapter 6

Question 1

Which component of white light is not necessary for photosynthesis?

A. red

B. orange

C. green

D. blue

E. yellow

Question 2

Which of the following statements is not true of autotrophs?

A. they must take in organic matter to make energy

B. they produce their own foodC. plants are autotrophsD. they convert light energy into chemical

energyE. cyanobacteria are autotrophs

Question 3

Autotrophs produce only enough carbohydrates to feed themselves.

A. true

B. false

Question 4

A biologist wants to study organisms which are heterotrophic. Which of the following organisms would he or she be most interested in studying?

A. producersB. autotrophsC. plantsD. algaeE. consumers

Question 5

Which of the following organisms use molecules produced in photosynthesis?

A. autotrophs only

B. heterotrophs only

C. heterotrophs and autotrophs

D. only plants and algae

E. only animals

Question 6

Which of the following plant tissues is specialized for photosynthesis?

A. the cuticle

B. the upper epidermis

C. the lower epidermis

D. the mesophyll

E. the vascular tissue

Question 7

If the stomata of the plant were blocked up, what would the plant be unable to do?

A. absorb water

B. exchange gases

C. give off liquid water

D. absorb sunlight

E. make chlorophyll

Question 8

Flattened sacs within the chloroplast are known as:

A. chlorophyll

B. stomata

C. thylakoids

D. stroma

E. mesophyll

Question 9

What is the significance of the stoma of the chloroplast?

A. it contains metabolic enzymes used to grab carbon dioxide

B. it is where the pigment is stored

C. it is where oxygen leaves the plant

D. it helps plants absorb water

E. it is where carbon dioxide enters the leaf

Question 10

Where does the light reaction begin in photosynthesis?

A. the electron transport chain

B. photosystem I

C. the Calvin cycle

D. photo system II

E. the electron acceptor

Question 11

Which of the following have the shortest wavelength?

A. radio waves

B. X rays

C. microwaves

D. gamma rays

E. ultraviolet rays

Question 12

The substance that initially traps solar energy in photosynthesis is:

A. chlorophyll

B. RuBP

C. water

D. glucose

E. pyruvate

Question 13

The chief energy source for most organisms is glucose.

A. true

B. false

Question 14

If a molecule has been reduced, which of the following statements would be true?

A. it has lost electrons

B. the electrons have stayed the same

C. it has lost oxygen

D. it has gained electrons

E. it has gained oxygen

Question 15

During the process of photosynthesis, which of the following products are formed?

A. glucose and oxygen

B. glucose, water, and oxygen

C. glucose and water

D. glucose, water, and carbon dioxide

E. glucose and carbon dioxide

Question 16

Because oxidation and reduction go hand in hand, the entire reaction is called a synthesis reaction.

A. true

B. false

Question 17

A biologist is studying the raw materials that plants use to conduct photosynthesis. Which of the following molecules would he or she not be studying?

A. glucose and oxygenB. carbon dioxide and glucoseC. carbon dioxide and waterD. carbon dioxide and oxygenE. glucose and water

Question 18

Which of the following statements is untrue of the light reaction in photosynthesis?

A. it needs light to work

B. it occurs on the surface of the thylakoid membrane

C. it uses water and pigments

D. it happens in the chloroplast

E. it occurs in the stroma

Question 19

For the Calvin cycle to take place, which of the following must be added?

A. carbon dioxide

B. oxygen

C. light

D. water

E. glucose

Question 20

The reason that deciduous leaves turn colors of red and yellow in the fall is:

A. chlorophyll is converted into bright carotenoid pigments

B. when chlorophyll breaks down, bright pigments (already there) show through

C. it is a chemical reaction involving the formation of ice crystals

D. bright pigments are shifted up from the roots while chlorophyll moves down

E. red and yellow pigments can only be made during cool temperatures