Unit 3-Photosynthesis

Question 1

Number of stages in photosynthesis

Answer 1

2

Question 2

First stage of photosynthesis in which water is split

Answer 2

Light reactions

Question 3

Molecule which traps light energy from the sun

Answer 3

Chlorophyll

Question 4

Leaf structure which contains chlorophyll and is the site of photosynthesis

Answer 4

Chloroplast

Question 5

Energy rich molecule synthesised during the light reaction

Answer 5

ATP (adenosine triphosphate)

Question 6

Type of energy in ATP

Answer 6

Chemical energy

Question 7

Required to synthesis ATP

Answer 7

ADP + Pi + energy

Question 8

Produced when water is split

Answer 8

Hydrogen and oxygen (and energy)

Question 9

A by-product of water splitting that diffuses out of the leaf

Answer 9

Oxygen

Question 10

Second stage of photosynthesis where glucose is synthesised

Answer 10

Carbon fixation

Question 11

Controls the series of photosynthesis reactions

Answer 11

Enzymes

Question 12

Produced by water splitting and combines with carbon dioxide to produce glucose

Answer 12

Hydrogen

Question 13

Substance required to produce glucose

Answer 13

Hydrogen, carbon dioxide and ATP

Question 14

Product of photosynthesis that can be used in respiration or converted to other molecules

Answer 14

Glucose

Question 15

Structural carbohydrate used to make cell walls

Answer 15

Cellulose

Question 16

Storage carbohydrate in plants

Answer 16

Starch

Question 17

Word equation for photosynthesis

Answer 17

Water + Carbon dioxide —–> Glucose + Oxygen

Question 18

Term for an essential input in short supply that reduces the rate of photosynthesis

Answer 18

Limiting factor

Question 19

Limiting factor on a cloudy day in summer

Answer 19

Light intensity

Question 20

Limiting factor on a sunny day in winter

Answer 20

Temperature

Question 21

Three factors that may limit the rate of photosynthesis

Answer 21

Light intensity & temperature & carbon dioxide concentration