3.1.7 and 8 water and other ions Flashcards

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1
Q

Give a property of water

A

polar, solvent, reactive

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2
Q

Why is it useful to living organisms that water is polar?

A

acts as a universal solvent

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3
Q

why is it useful to living cells that water is a solvent?

A

reactions occur faster in solution

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4
Q

why is it useful to living cells that water is reactive?

A

takes place in hydrolysis and condensation reactions

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5
Q

name an important ion

A

hydrogen, sodium, iron, phosphate

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6
Q

how do water and ions enter cells?

A

they can move down a concentration gradient
both move through channel proteins
ions can move against a concentration gradient by active transport

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7
Q

3 properties of water that are important in biology

A

Is a metabolite
Is a solvent
Has a (relatively)high heat capacity
Has a (relatively)largenlatent heat of vaporisation/ evaporation
Has cohesion / hydrogen bonds between molecule

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