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Biology > 2.13 Photosynthesis > Flashcards

2.13 Photosynthesis Flashcards

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1
Q

what types of compounds form the base of photosynthesis?

A

carbon-based compounds

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2
Q

what do plants use photosynthesis for?

A

to make their own food

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3
Q

how long was photosynthesis thought to have originated?

A

2 1/3 billion years ago

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4
Q

what types of organisms can photosynthesize?

A

plants, some bacteria, protist

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5
Q

why are these organisms called autotrophs?

A

they produce their own food

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6
Q

what are heterotrophs?

A

organisms that can not produce their own food

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7
Q

what is the function of the epidermis?

A

prevent water loss

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8
Q

what is the function of the stoma?

A

control gas exchange and the loss of water vapour through the pores of the leaf

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9
Q

where do most of photosynthesis take place?

A

middle of the leaf

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10
Q

what is the stroma?

A

semi-fluid interior of the chloroplast

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11
Q

what are the grana?

A

stacks of thylokoids

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12
Q

what are the two main stages of photosynthesis?

A

the light-dependent and light-independent

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13
Q

what do the pigments within the chloroplast do?

A

absorb energy from the sun

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14
Q

what is a photon

A

a tiny particle of electromagnetic radiation

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15
Q

what is the main photosynthesizing pigment?

A

chlorophyll A

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16
Q

why do leave change colour in the fall?

A

plants produce chlorophyll A

17
Q

what is the function of a photosystem?

A

the cluster pigments are more efficient at absorbing energy from the sun

18
Q

what are two ways to form ATP in the light-dependent reactions

A

cyclic pathway and the non cyclic pathway

19
Q

what molecules are produced in the light-dependent reactions that are required for the light-independent reactions (Calvin cycle)

A

ATP and NADPH

20
Q

what other molecules are required to start the Calvin Cycle?

A

CO2

Biology (35 decks)

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