5.2.1 Photosynthesis

Question 1

equation for photosynthesis

Answer 1

water + carbon dioxide -> oxygen + glucose

Question 2

where does photosynthesis take place

Answer 2

in chloroplast

Question 3

what does photosynthesis require to occur

Answer 3

light energy

Question 4

what are photons

Answer 4

packages of light energy

Question 5

what do plants do with the products of photosynthesis

Answer 5

use them for respiration
excess O2 is released into the atmosphere through the stomata
glucose is converted into starch to be stored or sucrose to travel to the sink such as tip of plant to be used

Question 6

autotroph definition

Answer 6

produces own food/ organic molecules

Question 7

heterotroph definition

Answer 7

consumes other organisms to get energy

Question 8

what word is used to describe a double membrane

Answer 8

envelope

Question 9

Granum definition

Answer 9

stack of thylakoids

Question 10

what are photosynthetic pigments

Answer 10

pigments that can absorb light energy

Question 11

example of primary photosynthetic pigments

Answer 11

chlorophyll a

Question 12

example of accessory photosynthetic pigments

Answer 12

chlorophyll b
carotene
xanthophyll

Question 13

what color is chlorophyll a

Answer 13

yellow green

Question 14

what color is chlorophyll b

Answer 14

blue green

Question 15

what are accessory pigments

Answer 15

absorb light at a range of wavelengths and pass on the light energy to chlorophyll a

Question 16

what is the stationary phase in thin layer chromatography

Answer 16

adsorbent silica

Question 17

what does chromatography separate the molecules according to

Answer 17

size and solubility

Question 18

adsorption spectra

Answer 18

identifies the amount of light absorbed at different wavelengths

Question 19

action spectra

Answer 19

shows the effectiveness of different wavelengths of light in bringing about photosynthesis

Question 20

what would happen to a plant if you put it under green light only

Answer 20

die as it can’t absorb the green so wont be able to photosynthesis

Question 21

what are photosystems

Answer 21

chlorophyll and other pigments arranged in complexes with proteins

Question 22

what do photosystems contain

Answer 22

200 molecules
50 molecules of accessory pigments
with several protein molecules and lipids

Question 23

advantage of plant having range of accessory pigments in photosystems

Answer 23

can absorb a wider range of light wavelengths

Question 24

2 stages of photosynthesis

Answer 24

light dependent
light independent

Question 25

what are the 2 types of photophosphorylation

Answer 25

cyclic and non cyclic

Question 26

name for light dependent stage

Answer 26

photophosphorylation

Question 27

name for light independent stage

Answer 27

Calvin cycle