A2 Biology OCR Unit 1 Flashcards Photosynthesis

A2 BIOLOGY OCR UNIT 1 - PHOTOSYNTHESIS FLASH CARDS

QUESTIONS MADE FROM REVISION GUIDE - TEST YOURSELF! 

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Give the name of a coenzyme involved in photosynthesis and describe its use.
NADP. Transfers hydrogen from one molecule to another, it can reduce or oxidise a molecule.
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Name 2 photosynthetic pigments in chloroplasts of plants.
1) Chlorophyll a 2) Carotene
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At what wavelength does photosystem I absorb light best?
700nm
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What 3 substances does non-cyclic photophosphorylation produce?
ATP, Reduced NADP, Oxygen
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What photosystem is involved in cyclic photophosphorylation?
Photosystem I
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Where in the chloroplasts does the light-independent reaction occur?
Stroma
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Name two organic substances made from triose phosphate.
Carbohydrates, lipids
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How many CO2 molecules need to enter the Calvin cycle to make one hexose sugar?
6
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Describe two ways in which a chloroplast is adapted for photosynthesis.
1) Thylakoids have a large surface area to allow as much light energy to absorbed as possible 2) Stroma contains all the enzymes, sugars and organic acids for the light-dependent reaction to take place.
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Where in the plant does the light-dependent reaction occur?
Thylakoid membranes
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In the light-dependent reaction, what is the purpose of photolysis?
Photolysis splits water into hydrogens and electrons. The electrons from the water replace the electrons lost from the chlorophyll.
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How is ribulose biphosphate regenerated in the calvin cycle?
It is regenerated from triose phosphate. ATP provides the energy to do this.
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Other cards in this set

Card 2

Front

Name 2 photosynthetic pigments in chloroplasts of plants.

Back

1) Chlorophyll a 2) Carotene

Card 3

Front

At what wavelength does photosystem I absorb light best?

Back

Preview of the front of card 3

Card 4

Front

What 3 substances does non-cyclic photophosphorylation produce?

Back

Preview of the front of card 4

Card 5

Front

What photosystem is involved in cyclic photophosphorylation?

Back

Preview of the front of card 5
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