11.1: Photosynthesis

Question 1

Main photosynthetic structure in eukaryotic plants

Answer 1

leaf

Question 2

Chloroplasts

Answer 2

cellular organelles where photosynthesis occurs

Question 3

Overall symbol equation for photosynthesis

Answer 3

6CO2 + 6H2O > C6H12O6 + 6O2

Question 4

Overall word equation for photosynthesis

Answer 4

carbon dioxide and water > glucose and oxygen

Question 5

Main stages in photosynthesis

3

Answer 5

• capturing of light energy
• the light-dependent reaction
• the light-independent reaction

Question 6

Grana

Answer 6

Stacks of up to 100 thylakoids

Question 7

Thylakoids

Answer 7

disc like structures that make up the grana

Question 8

Tubular extensions

Answer 8

some thylakoids have tubular extensions that join up with thylakoids in adjacent grana

Question 9

Where is chlorophyll found in chloroplasts

Answer 9

thylakoids

Question 10

Stroma

Answer 10

fluid-filled matrix where light-independent stage of photosynthesis occurs

Question 11

Structures found in the stroma

Answer 11

starch grains

Question 12

Light-dependent reaction

Answer 12

Involves the capture of light whose energy is used for two purposes

Question 13

Uses of energy captured from light in light-dependent reaction
2

Answer 13

• forming ATP from ADP and Pi

- photolysis

Question 14

Photolysis

Answer 14

Replacement electrons for the ionised chlorophyll molecule are provided by water molecules that are split by light

Question 15

Photolysis equation

Answer 15

2H2O > 4H+ + 4e- + O2

Question 16

Reduction

Answer 16

the gain of electrons or hydrogen or the loss of oxygen

Question 17

Oxidation

Answer 17

the loss of electrons or hydrogen or the gain of oxygen

Question 18

OILRIG

Answer 18

oxidation is loss, reduction is gain

Question 19

Photoionisation

Answer 19

A chlorophyll molecule absorbs light energy which boosts a pair of electrons to a higher energy level and the electrons are in an excited state causing them to leave the molecule which ionises the chlorophyll molecule.

Question 20

Chemiosmotic theory

Answer 20

The mechanism by which ATP is produced.

Question 21

page 274

Answer 21

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