ICSE Class 10 Cell Cycle and Structure of Chromosomes — Mock Test (2027)
Free online mock test for Cell Cycle and Structure of Chromosomes (ICSE Class 10 Biology) — 20 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 Cell Cycle and Structure of Chromosomes 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.A duplicated chromosome has ________ chromatids
- A.One
- B.Two
- C.Three
- D.Four
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2.Which of the following correctly describes the procedure for preparing a slide of onion peel for microscopic examination, including the steps for staining and mounting?
- A.Cut the onion bulb into quarters, remove a thick scale leaf, tear a thin peel, place it in water, cut a small square, mount on a slide with water, cover with a coverslip, and stain with iodine or eosin.
- B.Peel the outer layer of the onion, place it directly on a slide, add a drop of methylene blue, and cover with a coverslip without cutting the peel.
- C.Cut a small piece of onion, crush it to release cells, spread the pulp on a slide, stain with safranin, and observe without a coverslip.
- D.Remove the outer skin of the onion, place it on a slide, add water, cover with a coverslip, and stain with hydrochloric acid before examination.
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3.Centromeres.
- A.It is a part of nucleus through which chromosomes are linked.
- B.It is a part of chromosome through which chromatids are linked.
- C.It is a part of DNA through which chromatids are linked.
- D.It is a part of RNA through which chromosomes are linked.
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4.Synthesis phase in the cell cycle is called so for the synthesis of more of (a) RNA
- a.RNA
- b.RNA and proteins
- c.DNA
- d.Glucose
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5.How does a haploid nucleus differ from a diploid nucleus of the same species?
- A.It has different genes.
- B.It has fewer chromosomes.
- C.It has more alleles.
- D.It is the result of fertilisation.
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