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National 5 Biology > Photosynthesis > Flashcards

Photosynthesis Flashcards

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1
Q

What is photosynthesis?

A

A PROCESS CARRIED OUT BY GREEN PLANTS TO PRODUCE FOOD (SUGAR) USING SUNLIGHT

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2
Q

The overall word equation forPhotosynthesis

A

CARBON DIOXIDE —> SUGAR
+ WATER + OXYGEN

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3
Q

two raw materials needed for photosynthesis

A

CO2 + H20

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4
Q

The products of photosynthesis

A

SUGAR AND OXYGEN

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5
Q

The two essential factors for photosynthesis

A

LIGHT ENERGY
CHLOROPHYLL

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6
Q

In which leaf cell structure is chlorophyll found?

A

IN CHLOROPLASTS

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7
Q

What is the function of
chlorophyll in photosynthesis?

A

TRAPS LIGHT ENERGY

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8
Q

What type of energy is light
energy converted to during
photosynthesis?

A

CHEMICAL ENERGY

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9
Q

What chemical substances control the reactions in photosynthesis

A

ENZYMES

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10
Q

The name of the first stage of photosynthesis

A

LIGHT REACTIONS

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11
Q

The raw material(s) for the light reaction

A

WATER

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12
Q

The product(s) of the light
reaction

A

HYDROGEN
OXYGEN
ATP

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13
Q

What happens to the oxygen
produced in the light reaction?

A

OXYGEN DIFFUSES FROM THE CELL INTO THE ATMOSPHERE

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14
Q

What happens to the hydrogen
produced in the light reaction?

A

USED IN CARBON FIXATION

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15
Q

The name for the second stage of photosynthesis

A

CARBON FIXATION

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16
Q

The raw material(s) for carbon
Fixation

A

CARBON DIOXIDE
HYDROGEN
ATP

17
Q

The product(s) of carbon fixation

A

SUGAR

18
Q

State the three fates of the
sugar produced during carbon
Fixation

A

AVAILABLE FOR RESPIRATION, CONVERTED TO STARCH (STORAGE) AND CELLULOSE (STRUCTURAL)

19
Q

Name the three factors which can affect the rate of photosynthesis

A

LIGHT INTENSITY
TEMPERATURE
CO2 CONCENTRATION

20
Q

What effect will a reduced rate of photosynthesis have on a plant?

A

THE GROWTH OF THE PLANT WILL BE REDUCED

21
Q

describe what happens in the light reactions

A

LIGHT ENERGY ABSORBED BY CHLOROPHYLL IS USED TO SPLIT WATER MOLECULES INTO HYDROGEN AND OXYGEN
ATP IS ALSO PRODUCED
OXYGEN DIFFUSES FROM THE CELL AND IS RELEASED INTO THE ATMOSPHERE
HYDROGEN AND ATP IS USED IN CARBON FIXATION

22
Q

describe what happens during carbon fixation

A

THE HYDROGEN IS COMBINED WITH co2 FROM THE AIR TO MAKE SUGAR

ATP PROVIDES THE ENERGY NEEDED FOR PHOTOSYNTHESIS

23
Q

What can the sugar from photosynthesis be used for?

A

RESPIRATION
CONVERTED TO CELLULOSE (STRUCTURE)
CONVERTED TO STARCH (STORAGE)

24
Q

how can you measure the rate of photosynthesis

A

MEASURE THE UPTAKE OF CO2

National 5 Biology (19 decks)

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