Ch 5Photosynthesis

Question 1

formula for photosynthesis

Answer 1

6CO2 + 12H2O = C6H12O6 + 6H2O + 6O2

Question 2

overall, is photosynthesis oxidation or reduction

Answer 2

reduction. it gains electrons from hydrogen in water.

Question 3

structure of chloroplast

Answer 3

double membrane, contains grana with layers of thylakoid membranes and stroma.

Question 4

where does light dependent reaction take place

Answer 4

thylakoids

Question 5

where does calvin cycle take place

Answer 5

stroma

Question 6

photosynthetic pigments

Answer 6

absorb light energy and use it to carry out photosynthesis

Question 7

chlorophyll a

Answer 7

green photosynthetic pigment, the only pigment that can participate directly in light reactions.

Question 8

antennae

Answer 8

accessory pigments, assist in photosynthesis by capturing and passing on photons of light to chlorophyll a, expand range of light.

Question 9

chlorophyll b

Answer 9

green and absorbs all other wavelengths but green.

Question 10

carotenoids

Answer 10

red, yellow, orange, make color of carrots

Question 11

phycobilins

Answer 11

red, found in red algaie.

Question 12

only light that is ______ can produce sugar

Answer 12

absorbed

Question 13

function of light dependent reactions

Answer 13

produce atp and protons for light independent reactions.

Question 14

function of light independent reactions

Answer 14

make sugar (PGAL)

Question 15

photosystem

Answer 15

in thylakoids, light absorbing complexes. each has chlorophyll a and accessory pigments, chlorophyll b, and carotenoids

Question 16

electron transport chain in photosynthesis?

Answer 16

chlorophyll in grana absorb light, excite electrons, which escape into ETC’s. energy of these excited electrons across thylakoid memb creates proton gradient, and ATP synthase does its work

Question 17

photolysis

Answer 17

break down of water into electrons, protons, and oxygen in photosynthesis.

Question 18

what do electrons from photolysis do?

Answer 18

replace those lost by chlorophyll in light dependent reactions

Question 19

what do protons from photolysis do?

Answer 19

pass through atp synthase channels and get carried by nadp to stroma for light indep

Question 20

PGAL

Answer 20

three carbon sugar from photosynthesis.

Question 21

carbon fixation

Answer 21

incorporation of carbon dioxide into a sugar molecule. occurs in the calvin cycle.

Question 22

calvin cycle

Answer 22

requires large amounts of atp, provided by light dependent reactions.

Question 23

important enzyme in calvin cycle

Answer 23

rubisco - ribulose biphosphate

Question 24

spongy mesophyll

Answer 24

part of a leaf, contains chloroplasts and carries out photsynthesis.

Question 25

leaf air spaces

Answer 25

surround spongy mesophyll, allow exchange of oxygen, co2, and water vapor

Question 26

guard cells

Answer 26

control opening and closing of stomates

Question 27

stomata

Answer 27

allow exchange of gases with minimum of water loss. have guard cells