ICSE Class 10 Molecular Basis of Inheritance — Mock Test (2027)
Free online mock test for Molecular Basis of Inheritance (ICSE Class 10 Botany) — 87 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.
What to expect: This mock test covers key concepts from the Molecular Basis of Inheritance chapter — including application-based and competency-focused questions aligned with how ICSE actually sets the paper.
Tip: Attempt without notes first to identify gaps, then review explanations for any wrong answers. Retake after a few days for best retention.
Sample questions
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1.The negatively charged DNA is wrapped around a positively charged histone octamer to form a structure called:
- A.Nucleosome
- B.Nucleoid
- C.Centromere
- D.Chromatid
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2.Arrange the three steps catalysed during bacterial transcription in the correct order:
- A.Initiation, elongation, termination
- B.Elongation, initiation, termination
- C.Termination, elongation, initiation
- D.Initiation, termination, elongation
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3.The semiconservative mode of DNA replication was experimentally proved in E. coli by:
- A.Meselson and Stahl
- B.Watson and Crick
- C.Taylor and colleagues
- D.Hershey and Chase
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4.The inducer that switches on the lac operon is:
- A.Lactose
- B.Glucose
- C.Galactose
- D.Sucrose
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5.If E. coli (dividing every 20 minutes) labelled with 15N is grown in 14N medium for 80 minutes, the proportion of light to hybrid density DNA would be:
- A.7 light : 1 hybrid
- B.1 light : 1 hybrid
- C.3 light : 1 hybrid
- D.All hybrid
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