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Biology OCR A - A-level > Photosynthesis > Flashcards

Photosynthesis Flashcards

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1
Q

What do plants need energy for?

A

Photosynthesis, active transport, DNA replication, cell division and protein synthesis

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2
Q

What do animals need energy for?

A

Muscle contraction, body temp maintenance, active transport, DNA replication, cell division and protein synthesis

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3
Q

How do plants make glucose?

A

Photosynthesis

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4
Q

What is the word equation for photosynthesis?

A

Carbon dioxide + water -> sugar + oxygen

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5
Q

What is the equation for photosynthesis?

A

6CO2 + 6H2O + Energy -> C6H12O6 +6O2

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6
Q

How do animals obtain glucose?

A

Eating plants or other animals

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7
Q

What is the process where living cells release energy from glucose?

A

Respiration

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8
Q

What is aerobic respiration?

A

Respiration using oxygen

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9
Q

What is anaerobic respiration?

A

Respiration without oxygen

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10
Q

What is the equation for aerobic respiration?

A

C6H12O6 +6O2 -> 6CO2 + 6H2O + Energy

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11
Q

What is the metabolic pathway?

A

A series of small reactions controlled by enzymes

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12
Q

What is phosphorylation

A

Adding phosphate to a molecule

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13
Q

What is photophosphorylation?

A

Adding phosphate to a molecule using light

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14
Q

What is photolysis?

A

The splitting of a molecule using light

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15
Q

What is hydrolysis?

A

The splitting of a molecule using water

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16
Q

What is decarboxylation?

A

The removal of carbon dioxide from a molecule

17
Q

What is dehydrogenation?

A

The removal of hydrogen from a molecule

18
Q

What are redox reactions?

A

Reactions that involve oxidation or reduction

19
Q

What happens to something that has been reduced?

A

It has gained electrons and may have gained hydrogen or lost oxygen

20
Q

What happens to something if it has been oxidised?

A

It has lost electrons and may have lost hydrogen or gained oxygen

21
Q

What is a coenzyme?

A

A molecule that aids the function of an enzyme

22
Q

What is the coenzyme used in photosynthesis?

A

NADP

23
Q

What does NAPD do in photosynthesis?

A

Transfers hydrogen from one molecule to another so it can reduce or oxidise a molecule

24
Q

Where does photosynthesis take place?

A

In the chloroplast of plant cells

25
Q

What are chloroplasts?

A

Small flattened organelles found in plant cells that are the location for photosynthesis in plants

26
Q

What is the chloroplast envelope?

A

The double membrane that chloroplasts have

27
Q

What are thylakoids?

A

Fluid filled sacs that are stacked up in the chloroplast into the structures called grana

28
Q

What are grana linked together by?

A

Lamellae

29
Q

What are photosynthetic pigments?

A

Coloured substances that absorb light energy needed for photosynthesis

30
Q

What are accessory pigments?

A

Pigments that can absorb light and pass it down to a primary pigment

31
Q

What do chloroplasts have in the stroma?

A

DNA

32
Q

What are the two photosystems?

A

PSI (680nm) and PSII (700nm)

33
Q

What are carbohydrates produced by photosynthesis stored as and where?

A

Stores as starch grains in the stroma

34
Q

What are the two stages of photosynthesis

A

The light dependant stage and the light independent stage

Biology OCR A - A-level (24 decks)

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