Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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2730 questions · page 122 of 137 · choose a topic above to narrow them down

SA-OB-NE-0051 markL2 StandardCalculatorThe eye

In bright light, the pupil becomes smaller because

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SA-OB-PH-0031 markL2 StandardCalculatorEquation

\mathrm{6CO_2+6H_2O\rightarrow C_6H_{12}O_6+\_\,O_2}

, what number goes in front of

\mathrm{O_2}

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SA-OB-PH-0041 markL2 StandardCalculatorExperiments

In the starch test on a leaf, the leaf is warmed in ethanol to

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SA-OB-PH-0051 markL2 StandardCalculatorExperiments

A variegated leaf is tested with iodine. Only the green parts turn blue-black. This shows

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SA-OB-PK-0021 markL2 StandardCalculatorPlanning

A control experiment using boiled enzyme shows that

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SA-OB-PK-0031 markL2 StandardCalculatorPlanning

Temperature is best kept constant using

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SA-OB-PK-0041 markL2 StandardCalculatorEvaluating

Repeating an experiment and calculating a mean improves

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SA-OB-PK-0052 marksL2 StandardCalculatorData and drawings

Results:

12, 14, 13, 30

. Calculate the mean excluding the anomalous result.

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SA-OB-PO-0031 markL2 StandardCalculatorGrowth curves

In the stationary phase of a population curve,

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SA-OB-PO-0041 markL2 StandardCalculatorGrowth curves

Exponential growth happens when

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SA-OB-PO-0052 marksL2 StandardCalculatorSampling

Quadrats of

1\ \text{m}^2

contain a mean of

3.5

plants. The field is

400\ \text{m}^2

. Estimate the population.

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SA-OB-PR-0031 markL2 StandardCalculatorFlowers

Pollination is the transfer of pollen from

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SA-OB-PR-0041 markL2 StandardCalculatorFlowers

After fertilisation, the ovule develops into the

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SA-OB-PR-0051 markL2 StandardCalculatorFlowers

Which is a feature of wind-pollinated flowers?

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SA-OB-RE-0031 markL2 StandardCalculatorAnaerobic

Anaerobic respiration in human muscles produces

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SA-OB-RE-0041 markL2 StandardCalculatorAnaerobic

Anaerobic respiration in yeast produces

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SA-OB-RE-0051 markL2 StandardCalculatorAnaerobic

Compared with aerobic respiration, anaerobic respiration

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SA-OB-SC-0032 marksL2 StandardCalculatorMagnification

A cell drawing is

25

mm wide at ×500. Calculate the actual width in μm.

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SA-OB-SC-0051 markL2 StandardCalculatorSpecialised cells

Palisade mesophyll cells are adapted for photosynthesis because they

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SA-OB-TP-0031 markL2 StandardCalculatorAuxin

Auxin is made in the

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