Skip to content

Salam Academy

Sign in Create account

Practise

Question bank

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

TopicSkillDifficulty

Sign in to check answers. Your attempts build your mastery and error book.

12 questions

SA-AB-MB-0121 markL1 FoundationCalculatorTime of death

DNA profiling in forensics can be used to

Salam Academy Original Practice · Proposed mark scheme

SA-AB-MB-0012 marksL2 StandardCalculatorCalculations

100 bacteria have a generation time of 20 min. How many are there after 3 hours of exponential growth?

Salam Academy Original Practice · Proposed mark scheme

SA-AB-MB-0031 markL2 StandardCalculatorMicrobial growth

During the lag phase, bacteria

Salam Academy Original Practice · Proposed mark scheme

SA-AB-MB-0041 markL2 StandardCalculatorMicrobial growth

The stationary phase occurs because

Salam Academy Original Practice · Proposed mark scheme

SA-AB-MB-0051 markL2 StandardCalculatorMicrobial growth

For a reliable plate count, choose a plate with

Salam Academy Original Practice · Proposed mark scheme

SA-AB-MB-0062 marksL2 StandardCalculatorTime of death

A body at 31 °C; normal 37 °C; cooling ~1.5 °C per hour. Estimate time since death (h).

Salam Academy Original Practice · Proposed mark scheme

SA-AB-MB-0071 markL2 StandardCalculatorTime of death

Rigor mortis occurs because

Salam Academy Original Practice · Proposed mark scheme

SA-AB-MB-0081 markL2 StandardCalculatorTime of death

Forensic entomology estimates time of death using

Salam Academy Original Practice · Proposed mark scheme

SA-AB-MB-0101 markL2 StandardCalculatorMicrobial growth

Turbidity measured with a colorimeter estimates

Salam Academy Original Practice · Proposed mark scheme

SA-AB-MB-0111 markL2 StandardCalculatorMicrobial growth

On a log-scale growth curve, the exponential phase appears as

Salam Academy Original Practice · Proposed mark scheme

SA-AB-MB-0022 marksL3 ExamCalculatorCalculations

0.1 cm³ of a 10⁻⁵ dilution produces 45 colonies. Calculate cells per cm³ in the original culture (×10⁷).

Salam Academy Original Practice · Proposed mark scheme

SA-AB-MB-0091 markL3 ExamCalculatorTime of death

Insect development on a body is faster in hot weather, so estimates must

Salam Academy Original Practice · Proposed mark scheme