Class 10/Specimen Paper
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
BioNotesBioNotesCreated by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
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ICSE Suggested Specimen Paper Based Preparation Guide
A gardener takes a cutting from a rose plant and it grows into a new plant. Which type of cell division is responsible for this growth, and why?
If a human skin cell, which has 46 chromosomes, undergoes mitosis, how many chromosomes will each daughter cell have?
Why is it essential for meiosis to be a "reduction division" for sexual reproduction?
Odd One Out: Prophase, Metaphase, Interphase, Anaphase.
Compare and Contrast: List two differences between a cell in the G1 phase and a cell in the G2 phase of the cell cycle.
Cancer: Uncontrolled Cell Division
Cancer is a disease characterized by the uncontrolled division of abnormal cells. This happens when the normal checkpoints that regulate the cell cycle fail. For example, a cell might have damaged DNA, but a faulty checkpoint in the G2 phase fails to stop the cell from proceeding to mitosis. As a result, the cell divides, passing the damaged DNA to its daughter cells. These cells may then continue to divide uncontrollably, forming a tumor. Many cancer treatments, like chemotherapy, work by targeting and killing rapidly dividing cells, which is a hallmark of cancer.
Assertion (A): Meiosis is essential for sexual reproduction. Reason (R): Meiosis introduces genetic variation through crossing over.
(a) Both (A) and (R) are true and (R) is the correct explanation of (A). (b) Both (A) and (R) are true but (R) is not the correct explanation of (A). (c) (A) is true but (R) is false. (d) (A) is false but (R) is true.
Colchicine is a chemical that inhibits the formation of spindle fibers during cell division. If a cell is treated with colchicine, at which stage would mitosis be arrested? What would be the consequences for the cell in terms of its chromosome number?