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Biology > Photosynthesis > Flashcards

Photosynthesis Flashcards

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1
Q

What is the green pigment in a plant

A

Chlorophyll

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2
Q

Where is chlorophyll found

A

In the chloroplasts

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3
Q

What is the word equation for photosynthesis

A

Carbon dioxide + water (light energy)—(chlorophyll)— sugar+ oxygen

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4
Q

What is the food that plants make

A

sugar

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5
Q

What is the by product of photosynthesis that diffuses out of the plant cells

A

Oxygen

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6
Q

What does a plant need to make sugar effectively

A

Carbon dioxide
water
suitable temperature
light energy
chlorophyll

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7
Q

What is the source of light energy used in photosynthesis

A

Sun

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8
Q

Why does a plant need to photosynthesise

A

growth

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9
Q

What energy change occurs in light reaction

A

Light energy to chemical energy

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10
Q

describe the first stage of photosynthesis

A

Light energy from the sun is trapped by chlorophyll in the chloroplasts
this absorbed light energy si converted in chemicla energy stored as ATP
light energy is also used to split water into hydrogen and oxygen
oxygen diffuses out from the cell
the hydrogen and ATP from the light reaction are needed in stage 2

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11
Q

Describe the second stage of photosynthesis

A

carbon fixation is a series of enzyme controlled reaction
hydrogen and carbon dioxide combine to form sugar
ATP provides the energy for this synthesis recation

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12
Q

What type of carbohydrate is starch

A

storage carbohydrate

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13
Q

What type of carbohydrate is cellulose

A

Structural carbohydrate

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14
Q

Which part fo the cell would contain cellulose

A

cell wall

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15
Q

What small molecules are starch and cellulose made of

A

glucose and carbin dioxide

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16
Q

What properties of starch and cellulose make them suitable for their function

A

They are large insoluble molecules

17
Q

What can the chemical energy in sugar be used for

A

An energy source- respiration
plant energy storage- converted into starch
Plant building material- converted in cellulose

18
Q

What three factors can limit the rate of photosynthesis

A

Light intensity
carbon dioxide concentration
temperature

19
Q
A
20
Q

Name the process responsible for the movement of water and its evaporation from the leafy shoot

A

Transpiration

Biology (22 decks)

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