Photosynthesis Test

Question 1

What kind of reaction is photosynthesis?

Answer 1

anabolic

Question 2

Is photosynthesis endergonic or exergonic?

Answer 2

endergonic

Question 3

Sunlight is absorbed as packets of energy called ______

Answer 3

photons

Question 4

Photosynthesis occurs mainly in the _____ of plants

Answer 4

leaves

Question 5

Pores on the underside of leaves are called ____

Answer 5

stoma

Question 6

What are the cells in leaves that contain chlorophyll?

Answer 6

mesosphyll cells

Question 7

What cell in a leaf does photosynthesis occur?

Answer 7

mesophyll cell

Question 8

What is the thick fluid inside of a chloroplast?

Answer 8

stroma

Question 9

Stacks of thylakoids are called ____

Answer 9

granum

Question 10

Why do leave turn colors in the fall?

Answer 10

the chlorophyll produces less green pigment and carotenoids are seen more

Question 11

Light dependent reactions use energy from the ____ to produce _____ and the energy carrier ____

Answer 11

sun
NADPH
ATP

Question 12

What is another name for the Calvin Cycle?

Answer 12

carbon fixation or the C3 pathway

Question 13

where do light dependent reactions take place?

Answer 13

thylakoid membrane

Question 14

What amount of wavelengths does photosystem 2 absorb?

Answer 14

680 nm

Question 15

where does the Calvin Cycle occur?

Answer 15

stroma

Question 16

what gas is used in the calvin cycle to produce glucose?

Answer 16

carbon

Question 17

What are 2 plants that use different pathways to make food?

Answer 17

CAM and C4

Question 18

what are examples of C4 plants?

Answer 18

grasses
corn
sugarcane

Question 19

photosynthesis occurs in what two places in C4 plants?

Answer 19

light reactions - mesophyll cells

calvin cycle - bundle sheathe cells

Question 20

C4 plants make a ____ carbon sugar called ____ in the mesophyll cells that enters bundle sheath cells

Answer 20

4

malate

Question 21

name two examples of CAM plants

Answer 21

pineapple trees
ice plants
cacti

Question 22

CAM plants ____ their stomata during the day and ____ them at night

Answer 22

close

open

Question 23

What factors effect photsynthesis?

Answer 23

light
temperature
water
CO2

Question 24

what is the splitting of water by light energy called?

Answer 24

photolysis

Question 25

why does the water molecule split in light reactions?

Answer 25

the electrons cause it to split

Question 26

what happens to the water molecule after its split?

Answer 26

oxygen- releases through the stoma into the atmosphere

hydrogen-build up in the thylakoid,
some become NADPH

electrons- PS2 to the ETC to PS1 become NADPH

Question 27

why is ATP made in the light reactions and where is it used?

Answer 27

ATP synthase phosphorylates ADP + P to make ATP for the calvin cycle

Question 28

what is given off in the light reactions?

Answer 28

ATP
NADPH
O2

Question 29

what does the electron transport chain?

Answer 29

a series of proteins that transports highly energized electrons

Question 30

How does ATP synthase help H+ ions?

Answer 30

it helps them in the thylakoid space pass through the membrane to the stroma

Question 31

What is the equation for NADP+ becoming NADPH

Answer 31

NADP + H+ = NADPH

Question 32

What are the reactants and products of light dependent reactions?

Answer 32

light H20

NADPH ATP O2

Question 33

What are the reactants and products of the calvin cycle?

Answer 33

CO2

glucose

Question 34

which molecule is used by all living things to store and transfer energy?

Answer 34

ATP

Question 35

what are the parts of an ATP molecule?

Answer 35

adine
ribose
phosphate

Question 36

which molecule is burned by all living things for energy?

Answer 36

ATP