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Photosynthesis Test A2 > Quick Questions > Flashcards

Quick Questions Flashcards

1
Q

Organisms that make their own food

A

Autotrophs

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2
Q

Process of adding hydrogen to carbon dioxide

A

Reduction

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3
Q

Incorporation of inorganic co2 into an organic molecule

A

Fixation

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4
Q

Part of leaf able to change the orientation of the leaf lamina to face the sun

A

Leaf blade

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5
Q

Layer of cell containing the most chloroplasts and how they’re adapted to aid photosynthesis

A

Palisade cell layer

Tall and closely packed together. Cylindrical shape for maximum absorption of light by chloroplasts.

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6
Q

Why is a leaf so thin?

A

For efficient gas exchange and larger surface area for photosynthesis

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7
Q

Function of the stomata

A

Like a valve for gas exchange whilst preventing loss of water

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8
Q

How does the spongy mesophyll layer help photosynthesis

A

Allows lots of co2 into the leaf for photosynthesis

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9
Q

Vascular tissue in a plant

A

Xylem and phloem

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10
Q

How xylem helps photosynthesis

A

Transports h2o from roots to leaves

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11
Q

How phloem helps photosynthesis

A

Transports glucose produced in photosynthesis to the rest of the plant

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12
Q

Features of epidermal cells that assist the leaf photosynthesising

A

Thin+ transparent to allow light to reach the palisade cells

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13
Q

Word equation for photosynthesis

A

Carbon dioxide + water = glucose + oxygen

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14
Q

Chemical equation for photosynthesis

A

6CO2 + 6H2O -> C6H12O6 + 6O2

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15
Q

Why do all living organisms need a source of energy

A 
Movement 
Respiration 
Growth 
Reproduction 
Excretion 
Nutrition 
Sensitivity
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16
Q

Autotrophic organisms 3 kingdoms

A

Prokaryotes
Protoctista
Plantae

17
Q

Heterotrophic nutrition.

A

Consumes food/ nutrition from other organisms

18
Q

Autotrophic nutrition

A

Creates own food energy from photosynthesis

19
Q

Energy source for photosynthesis

A

Solar energy

20
Q

Raw materials required for photosynthesis

A

CO2
H2O
Chlorophyll

21
Q

Waste product of photosynthesis. Why is it a useful byproduct?

A

Oxygen

Organisms need it to respire

22
Q

Photosystems

A

Photosynthetic pigments are arranged as Photosystems in the thylakoid membranes

23
Q

Two types of Photosystems

A

PS11 = P680 form (granal lamellae)

PS1 = P700 form (intergranal lamellae)

24
Q

Function of accessory pigments

A

Transfer energy to chlorophyll a by absorbing light at other wavelength ranges

25
Q

Examples of accessory pigments

A

Chlorophyll b

Carotenoids

26
Q

Purpose of photosynthetic pigment

A

To absorb light so that the plant can use its energy

27
Q

Why do plants use more than one pigment?

A

So it can absorb different colours of light and collect more energy

28
Q

The overall rate is determined by

A

The slowest reaction in the pathway

29
Q

Ways to measure the rate of photosynthesis

A

Oxygen production over time

Carbon dioxide use per unit time

Photosynthesis Test A2 (8 decks)

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