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Course: AQA A Level Biology 7402
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AQA A Level Biology 7402

1. Biological Molecules

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2. Cell Structure

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3. Exchange and Transport

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4. Genetics, Variation and Interdependence

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5. Energy Transfers In and Between Organisms (A Level only)

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6. Organisms Respond to Changes in their Environments (A Level only)

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7. Genetics, Populations, Evolution and Ecosystems (A Level only)

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8. The Control of Gene Expression (A Level only)

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9. Exam Guidance and Skills

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Quiz

1.6.4 Inorganic Ions – Exam questions

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  • Questions count: 10
  • Passing grade: B+
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1.
Plants use nitrate ions mainly to make
amino acids
cellulose
starch
lipids
2.
Water is a good solvent because it
is non-polar
is polar
has a low heat capacity
forms covalent bonds with solutes
3.
Which property explains cooling by sweating?
High latent heat of vaporisation
Cohesion
Ice is less dense
Adhesion
4.
Which ion is needed to make ATP?
Sodium
Nitrate
Calcium
Phosphate
5.
Cohesion between water molecules is due to
ionic bonds
hydrogen bonds
covalent bonds
disulfide bonds
6.
Why does ice floating benefit aquatic organisms?
It raises water temperature
It increases oxygen
It insulates the water beneath
It increases light
7.
Which statement best describes Dipole?
Attraction between water molecules due to hydrogen bonding.
A weak attraction between a δ+ hydrogen of one molecule and a δ− atom (such as O) of another.
A positively charged ion, e.g. Ca2+.
An uneven distribution of charge within a molecule; water has δ− oxygen and δ+ hydrogens.
8.
Which statement best describes Solvent?
An uneven distribution of charge within a molecule; water has δ− oxygen and δ+ hydrogens.
The energy needed to raise the temperature of 1 kg of a substance by 1 °C; high for water (4.2 kJ kg−1 °C−1).
A liquid in which solutes dissolve; water dissolves polar and charged substances.
A weak attraction between a δ+ hydrogen of one molecule and a δ− atom (such as O) of another.
9.
Which statement best describes Anion?
A negatively charged ion, e.g. PO43−.
The energy needed to change liquid water into vapour; high for water, making sweating effective.
The energy needed to raise the temperature of 1 kg of a substance by 1 °C; high for water (4.2 kJ kg−1 °C−1).
A positively charged ion, e.g. Ca2+.
10.
Which statement best describes Cohesion?
A negatively charged ion, e.g. PO43−.
A charged atom or group of atoms not containing carbon-hydrogen bonds, e.g. Na+, NO3−.
Attraction between water molecules and other surfaces, such as xylem walls.
Attraction between water molecules due to hydrogen bonding.
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Part of 1. Biological Molecules — see every lesson and quiz in this unit.
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