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AQA Biology > 1.6 ATP, Water & Inorganic Ions > Flashcards

1.6 ATP, Water & Inorganic Ions Flashcards

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1
Q

What is the role of ATP?

A

Release energy

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2
Q

What process produces ATP?

A

Respiration

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3
Q

What reaction hydrolyses ATP?

A

ATP (+ H2O) -> ADP + Pi

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4
Q

What reaction synthesises ATP?

A

ADP + Pi -> ATP (+ H2O)

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5
Q

What is the structure of ATP?

A

Ribose sugar
3 phosphate groups
Base

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6
Q

Why is ATP a good energy source in a cell?

A

Little energy released from each so cell doesn’t overheat
Releases energy immediately
Rapidly resynthesised
Does not leave cells
Can phosphorylate other compounds making them more reactive

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7
Q

Why is water important in biology?

A

Makes up large proportion of all living bodies

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8
Q

What reactions does water take part in?

A

Hydrolysis

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9
Q

What is a metabolite?

A

A substance that takes part in chemical reactions

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10
Q

What is a solvent?

A

Able to dissolve other substances meaning chemical reactions can occur

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11
Q

Why is relevant that H bonds form between water molecules?

A

Cohesion

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12
Q

Why is cohesion important for organisms?

A

Creates surface tension so weight is supported when living on water surfaces

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13
Q

Why is cohesion important in plants?

A

Creates columns of water that can move in the transpiration stream

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14
Q

What is relevant about waters latent heat of vaporisation?

A

High due to H bonding
Provides cooling effect through evaporation

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15
Q

What is relevant about waters heat capacity?

A

High
Buffers changes in tempertaure

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16
Q

Name 6 inorganic ions important to living things.

A

Fe2+, K+, Na+, Cl-, nitrates, phosphates

17
Q

Why are iron ions important to living things?

A

Binds to oxyhaemoglobin to transport it around the body

18
Q

Why are potassium ions important to living things?

A

Regulates action potentials and return to resting potential in neurones

19
Q

Why are sodium ions important to living things?

A

Regulates action potentials and return to resting potential in neurones
Involved in water reabsorption in the kidneys

20
Q

Why are chloride ions important to living things?

A

Involved in inhibition of action potentials in synapses

21
Q

Why are nitrates important to living things?

A

Needed in plants to make proteins

22
Q

Why are phosphates important to living things?

A

Make RNA and DNA

AQA Biology (43 decks)

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