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Course: Edexcel A Level Biology A (SNAB) 9BI0
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Edexcel A Level Biology A (SNAB) 9BI0

Topic 1 · Lifestyle, Health and Risk

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Topic 2 · Genes and Health

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Topic 3 · Voice of the Genome

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Topic 4 · Biodiversity and Natural Resources

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Topic 5 · On the Wild Side

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Topic 6 · Immunity, Infection and Forensics

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Topic 7 · Run for your Life

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Topic 8 · Grey Matter

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Quiz

4.2.3 Importance of Water and Inorganic Ions to Plants – 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.
Cohesion between water molecules is due to
ionic bonds
hydrogen bonds
covalent bonds
disulfide bonds
4.
Which property explains cooling by sweating?
High latent heat of vaporisation
Cohesion
Ice is less dense
Adhesion
5.
Which ion is needed to make ATP?
Sodium
Nitrate
Calcium
Phosphate
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 Topic 4 · Biodiversity and Natural Resources — see every lesson and quiz in this unit.
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