Chapter 8-Photosynthesis

Question 1

The final product of the Calvin Cycle is

Answer 1

G3P

Question 2

Photosynthesis takes place in the membranes of small sacs called

Answer 2

Thylakoids

Question 3

The dark reaction in photosynthesis is limited by

Answer 3

CO2, temperature, and light

Question 4

During what stage of photosynthesis is O2(Oxygen) produced?

Answer 4

The light dependent reactions involving photosystem I and II

Question 5

Colors of light most useful in photosynthesis are

Answer 5

Red, violet, and blue

Question 6

The pigment molecules responsible for photosynthesis are located in the

Answer 6

Thylakoid membrane of the chloroplast

Question 7

Both carotenoids and chlorophylls

Answer 7

Are pigments.

Question 8

The light reaction of photosynthesis does not include

Answer 8

Oxygen Liberation

Question 9

Which of the following is the correct sequence for the movement of electrons during the light-dependent reactions of plants?

Answer 9

water à P680 à P700 à NADP+

Question 10

What pigment is used in human vision?

Answer 10

retinal

Question 11

During what stage of photosynthesis are ATP and NADPH converted to ADP + Pi and NADP+?

Answer 11

the light-independent reactions

Question 12

Water vapor exits and CO2 enters a leaf through the

Answer 12

stomata

Question 13

Which of the following organisms have the greatest problem with photorespiration?

Answer 13

C3 Plants

Question 14

What energy-rich organic compound is produced as a result of the Calvin cycle?

Answer 14

glucose

Question 15

High-energy photons

Answer 15

have short wavelengths

Question 16

Light that is visible to humans occupies what part of the electromagnetic spectrum?

Answer 16

a small portion in the middle

Question 17

During photosynthesis, photons raise electrons to higher energy levels. These excited electrons belong to what compound?

Answer 17

chlorophyll

Question 18

Which of the following occurs during the light-dependent reactions of plants?

Answer 18

electron transport, chemiosmosis, splitting of water

Question 19

Compared to retinal, chlorophyll can be described as a pigment that has a

Answer 19

narrow absorption range but high efficiency

Question 20

The earliest photosynthesizers probably used what as a source of hydrogen?

Answer 20

H2S

Question 21

How many carbon atoms are in a molecule of RuBP?

Answer 21

five

Question 22

The oxygen that is released as O2 during photosynthesis came from _____________ molecules.

Answer 22

water

Question 23

Which of the following is mismatched?

Answer 23

CAM plants - open their stomata during the day and close them at night to avoid photorespiration

Question 24

Which of the following statements about photosynthesis is true?

Answer 24

the light-dependent reactions produce the energy-rich compounds that are used to run the light-independent reactions

Question 25

Which of the following statements accurately describes the relationship between photosynthesis and cellular respiration?

Answer 25

photosynthesis uses solar energy to convert inorganics to energy-rich organics; respiration breaks down energy-rich organics to synthesize ATP

Question 26

In sulfur bacteria, how many pigment electrons must get transported during cyclic photophosphorylation to produce one molecule of ATP?

Answer 26

three

Question 27

Production of one molecule of 3-phosphoglyceraldehyde requires how many turns of the Calvin cycle?

Answer 27

3

Question 28

To reduce six molecules of carbon dioxide to glucose via photosynthesis, how many molecules of NADPH and ATP are required?

Answer 28

12 NADPH and 18 ATP

Question 29

The primary form of sugar transported from the site of photosynthesis to the rest of the plant is:

Answer 29

sucrose

Question 30

Rubisco:

Answer 30

catalyzes the carboxylation of CO2 to ribulose 1,5-bisphosphate. and initiates photorespiration when the CO2/O2 ratio is low.

Question 31

The immediate products of C3 and C4 photosynthesis are, respectfully:

Answer 31

3-phosphoglycerate; oxaloacetic acid

Question 32

Light-driven electron transport in the chloroplast pumps H+ into the intermembrane space between the outer and inner membranes. (true or false)

Answer 32

FALSE

Question 33

CO2 fixation occurs within the storm. | false or true

Answer 33

TRUE

Question 34

If you know the absorption spectrum of a pigment, you can predict the pigment's color. (true or false)

Answer 34

TRUE.

Question 35

For every CO2 molecule fixed by photosynthesis, one molecule of O2 is produced. (true or false)

Answer 35

TRUE

Question 36

Light is required for the light dependent reactions because

Answer 36

it energizes electrons in the reaction center