Please refer to Cell Cycle and Cell Division Class 11 Biology Important Questions with answers below. These solved questions for Chapter 10 Cell Cycle and Cell Division in NCERT Book for Class 11 Biology have been prepared based on the latest syllabus and examination guidelines issued by CBSE, NCERT, and KVS. Students should learn these solved problems properly as these will help them to get better marks in your class tests and examinations. You will also be able to understand how to write answers properly. Revise these questions and answers regularly. We have provided Notes for Class 11 Biology for all chapters in your textbooks.

Important Questions Class 11 Biology Chapter 10 Cell Cycle and Cell Division

Objective Questions

Question. During mitosis, nuclear envelope, nucleolous begin to form and ER to reappear at ______
(a) prophase
(b) late metaphase
(c) anaphase
(d) telophase

Question. Chromosome synapsis or bivalent formation occurs in ______
(a) leptotene
(b) zygotene
(c) pachytene
(d) diplotene

Question. Crossing over occurs during ______
(a) leptotene
(b) pachytene
(c) diplotene
(d) diakinesis

Question. Chiasmata are first seen in ______
(a) leptotene
(b) zygotene
(c) pachytene
(d) diplotene

Question. Terminalization occurs during ______
(a) mitosis
(b) diakinesis
(c) meiosis II
(d) cytokinesis

Question. The microtubules of the mitotic spindle attach to a specializes structure in the centromere region of each chromosome called the __________.
(a) Telomere
(b) Centriole
(c) Chromatin
(d) Kinetochore

Statement Type Questions

Question. Which of the following statement(s) is/are true ?
(a) Cell plate represents the middle lamella between the walls of two adjacents cells.
(b) At the time of cytokinesis, organelles like mitochondria and plastids get distributed between the daughter cells.
(c) Cytokinesis in plant cell is centrifugal and takes place by cell-plate formation while animal cells by furrowing/cleavage and is centripetal.
(d) All of the above

Question. Which of the following statements related to G₀ stage of the cell cycle are correct?
(i) It is a quiescent stage.
(ii) In this phase, cell cycle is stopped.
(iii) G₀ cells do not grow or proliferate but metabolically active.
(iv) G₀ cells can divide in response to some stimulus.
(a) (i), and (ii)
(b) (i), (ii) and (iii)
(c) Only (i) and (iv)
(d) All of the above

Assertion/Reason Type Questions

In the following questions, a statement of Assertion is followed by a statement of Reason.
(a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
(b) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
(c) If Assertion is true but Reason is false.
(d) If both Assertion and Reason are false.

Question. Assertion: The final stage of meiotic prophase 1 is diplotene.
Reason: Diplotene is marked by terminalisation of chiasmata.

Question. Assertion: Metaphase II begins with splitting of centromere of each chromosome into two.
Reason: In Anaphase II chromosomes align at the equator.

Matching Type Questions

Question. Mark the incorrect pair.
(a) Interphase – S-phase
(b) M phase – Metaphase
(c) Meiosis I – Diplotene
(d) Meiosis II – Diakinesis

Question. Which of the following pair is correctly matched ?
(a) Anaphase I – Homologous chromosomes are separated.
(b) Metaphase I – Pairing of maternal and paternal chromosomes.
(c) Interphase – A nuclear envelop encloses each haploid set of chromosomes.
(d) Prophase I – Non-homologous chromosomes are separated.

Critical Thinking Type Questions

Question. Mitosis occurs in
(a) haploid individuals.
(b) diploid individuals.
(c) Both (a) and (b)
(d) in bacteria only.

Question. The major event that occurs during the anaphase of mitosis, which brings about the equal distribution of chromosomes is
(a) replication of the genetic material.
(b) splitting of the chromatids.
(c) splitting of the centromeres.
(d) condensation of the chromatin.

Question. Which of the following will show simple cell division?
(a) Microspore mother cells
(b) Megaspore mother cells
(c) Archesporial cells
(d) All of the above.

Question. Four daughter cells formed after meiosis are
(a) genetically similar
(b) genetically different
(c) anucleate
(d) multinucleate

Question. In meiosis, the daughter cells differ from parent cell as well as amongst themselves due to
(a) segregation, independent assortment and crossing over.
(b) segregation and crossing over.
(c) independent assortment and crossing over.
(d) segregation and independent assortment.

Question. Cell would normally proceed to mitosis without interruption
(a) once it has entered the S phase.
(b) once it has entered the G₂ phase.
(c) at any time during cell division activity.
(d) none of the above

Question. In telophase of mitosis, the mitotic spindle breaks down and nuclear membranes form. This is essentially the opposite of what happens in
(a) prophase
(b) interphase
(c) metaphase
(d) S phase

Question. A triploid nucleus cannot undergo meiosis because
(a) crossing over does not occur.
(b) karyokinesis can not occur.
(c) chromosomes do not replicate.
(d) not all of the chromosomes can form homologous pairs.

Question. It is important that the centromere not divide till the end of metaphase because it
(a) is connected with nuclear membrane.
(b) contains genes that control prophase.
(c) holds the replicated DNA molecules together.
(d) produces spindle fibres.

Question. Which of the following carry the same genetic information?
(a) Sister chromatids
(b) X and Y chromosomes
(c) All autosomes
(d) Homologous chromosomes

Question. Which of the following is responsible for the formation of the new cell wall and also represents the middle lamella between the walls of two adjacent cells?
(a) Cell plate
(b) Cell inclusion
(c) Cell membrane
(d) None of the above