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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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12 questions

SA-AB-PS-0011 markL1 FoundationCalculatorGenetic code

A codon is found on

Salam Academy Original Practice · Proposed mark scheme

SA-AB-PS-0071 markL1 FoundationCalculatorGenetic code

How many different codons are possible with 4 bases in triplets?

Salam Academy Original Practice · Proposed mark scheme

SA-AB-PS-0121 markL1 FoundationCalculatorProcess

Translation takes place at

Salam Academy Original Practice · Proposed mark scheme

SA-AB-PS-0021 markL2 StandardCalculatorGenetic code

The genetic code is degenerate, meaning

Salam Academy Original Practice · Proposed mark scheme

SA-AB-PS-0031 markL2 StandardCalculatorProcess

Transcription is carried out by

Salam Academy Original Practice · Proposed mark scheme

SA-AB-PS-0041 markL2 StandardCalculatorProcess

Splicing removes

Salam Academy Original Practice · Proposed mark scheme

SA-AB-PS-0051 markL2 StandardCalculatorGenetic code

DNA template triplet TAC gives the mRNA codon

Salam Academy Original Practice · Proposed mark scheme

SA-AB-PS-0062 marksL2 StandardCalculatorProcess

A polypeptide has 150 amino acids. What is the minimum number of mRNA bases needed, including one stop codon?

Salam Academy Original Practice · Proposed mark scheme

SA-AB-PS-0081 markL2 StandardCalculatorMutations

A substitution that doesn't change the amino acid is

Salam Academy Original Practice · Proposed mark scheme

SA-AB-PS-0091 markL2 StandardCalculatorMutations

A single-base deletion usually

Salam Academy Original Practice · Proposed mark scheme

SA-AB-PS-0101 markL2 StandardCalculatorProcess

During translation, tRNA anticodons bind to

Salam Academy Original Practice · Proposed mark scheme

SA-AB-PS-0111 markL3 ExamCalculatorMutations

In sickle cell anaemia, a base substitution changes glutamic acid to valine. This is a

Salam Academy Original Practice · Proposed mark scheme