Practise

Question bank

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

12 questions

SA-OB-AT-0011 markL1 FoundationCalculatorActive transport

Active transport moves substances

Salam Academy Original Practice · Proposed mark scheme

SA-OB-AT-0121 markL1 FoundationCalculatorActive transport

The energy for active transport comes from

Salam Academy Original Practice · Proposed mark scheme

SA-OB-AT-0021 markL2 StandardCalculatorActive transport

Root hair cells absorb mineral ions by

Salam Academy Original Practice · Proposed mark scheme

SA-OB-AT-0031 markL2 StandardCalculatorActive transport

Cells carrying out a lot of active transport contain many

Salam Academy Original Practice · Proposed mark scheme

SA-OB-AT-0042 marksL2 StandardCalculatorSA:V ratio

Calculate the surface area to volume ratio of a cube of side

3

cm. Give the first number of the ratio

x:1

Salam Academy Original Practice · Proposed mark scheme

SA-OB-AT-0052 marksL2 StandardCalculatorSA:V ratio

Calculate the SA:V ratio of a cube of side

1

cm, as

x:1

. Give

x

Salam Academy Original Practice · Proposed mark scheme

SA-OB-AT-0061 markL2 StandardCalculatorSA:V ratio

As an organism gets larger, its surface area to volume ratio

Salam Academy Original Practice · Proposed mark scheme

SA-OB-AT-0071 markL2 StandardCalculatorActive transport

A poison that stops respiration will stop

Salam Academy Original Practice · Proposed mark scheme

SA-OB-AT-0081 markL2 StandardCalculatorActive transport

Active transport requires

Salam Academy Original Practice · Proposed mark scheme

SA-OB-AT-0091 markL2 StandardCalculatorSA:V ratio

Large multicellular organisms need specialised exchange surfaces because

Salam Academy Original Practice · Proposed mark scheme

SA-OB-AT-0101 markL2 StandardCalculatorActive transport

Glucose is absorbed from the gut into villus cells partly by

Salam Academy Original Practice · Proposed mark scheme

SA-OB-AT-0111 markL3 ExamCalculatorActive transport

Root cells absorb potassium ions faster at

25\,^\circ\mathrm{C}

than at

5\,^\circ\mathrm{C}

, and almost none without oxygen. The best explanation is

Salam Academy Original Practice · Proposed mark scheme