CBSE Class 11 Biology Cell Cycle And Cell Division Worksheet Set A

Cell Cycle And Cell Division MCQ Questions with Answers Class 11 Biology

Question : Which of the following cellular structures always disappears during mitosis and meiosis?

(a) Plastid and nuclear membrane

(b) Nucleolus and nuclear membrane

(c) Endoplasmic reticulum and mitochondria

(d) Endoplasmic reticulum and plasma membrane

Answer :(b) 

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

Answer :(d)

Question : Synapsis occurs between

(a) spindle fibres and centromeres.

(b) mRNA and ribosomes.

(c) a male and female gamete.

(d) two homologous chromosomes.

Answer :(d)

Question :In which stage, the chromosomes appear thin and long thread-like ?

(a) Zygotene

(b) Leptotene

(c) Pachytene

(d) Prophase

Answer :(b)

Question :During mitosis, nuclear envelope, nucleolous begin to form and ER to reappear at ______

(a) prophase

(b) late metaphase

(c) anaphase

(d) telophase

Answer :(d)

Question : In cell cycle, DNA replication takes place in ______

(a) G₁ phase

(b) G₂ phase

(c) Mitotic metaphase

(d) S phase

Answer :(d)

Question : Which one of the following precedes re-formation of the nuclear envelope during M phase of the cell cycle ?

(a) Decondensation from chromosomes, and reassembly of the nuclear lamina.

(b) Transcription from chromosomes, and re-assembly of the nuclear lamina.

(c) Formation of the contractile ring, and formation of the phragmoplast.

(d) Formation of the contractile ring, and transcription from chromosomes.

Answer :(b)

Question : Significance of mitosis involves

(a) the growth of multicellular organism.

(b) cell repair.

(c) production of diploid daughter cells with identical genetic complement.

(d) all of the above

Answer :(d)

Question : Interphase includes all of the following except ______

(a) G₁ phase

(b) Anaphase

(c) S phase

(d) G₂ phase

Answer :(b)

Question : In meiosis, division is

(a) Ist reductional and IInd equational.

(b) Ist equational and IInd reductional.

(c) both reductional.

(d) both equational.

Answer :(a)

Question : Which of the following phase follows S and G2 phases of interphase?

(a) Prophase

(b) Metaphase

(c) Anaphase

(d) Telophase

Answer :(a)

Question : What is the stage of mitosis in which chromosomes are arranged on the equator of spindle?

(a) Anaphase

(b) Prophase

(c) Metaphase

(d) Telophase

Answer :(c)

Question : The synaptonemal complex appears

(a) between homologous chromosomes.

(b) in zygotene stage.

(c) composed of DNA + protein.

(d) All of the above

Answer :(d)

Question : In anaphase of mitosis,

(a) chromosomes get arranged in middle of cell.

(b) nuclear envelope disappears.

(c) chromosome fibres become clear.

(d) chromosomes aggregate at opposite poles to form daughter nuclei.

Answer :(d)

Question : Crossing over occurs during ______

(a) leptotene

(b) pachytene

(c) diplotene

(d) diakinesis

Answer :(b)

Question : Which of the following phase is called the resting phase during which cell is preparing for division by undergoing both cell growth and replication of DNA?

(a) M – phase

(b) Prophase

(c) Go phase

(d) Interphase

Answer :(d)

More Question

1 Which tissue of animals and plants exhibits meiosis?

2 Given that the average duplication time of E.coli is 20 minutes, how much time will two E.coli cells take to become 32 cells?

3 At what stage of cell cycle does DNA synthesis take place?

4 It is said that the one cycle of cell division in human cells (eukaryotic cells) takes 24 hours. Which phase of the cycle, do you think occupies the maximum part of cell cycle?

5 It is observed that heart cells do not exhibit cell division. Such cells do not divide further and exit ___________ phase to enter an inactive stage called ___________ of cell cycle.

6 The following events occur during the various phases of the cell cycle, Name the phase against each of the events. a. Disintegration of nuclear membrane _________________________ b. Appearance of nucleolus _________________________ c. Division of centromere _________________________ d. Replication of DNA _________________________

7 How does movement of chromosome occur during mitotic phase?

8 How does cytokinesis in plant cells differ from that in animal cells?

9 Comment on the statement – Telophase is reverse of prophase.

10 What are the various stages of meiotic prophase-I? Enumerate the chromosomal events during each stage?

11 Write brief note on the following a. Synaptonemal complex b. Metaphase plate

12 Give reason for the following statements:

a) Mitosis is equational division

b) Meiosis is reduction division

13 Write the significance of mitosis.

14 List the significance of meiosis.

15 Enumerate the processes occurring during the four stages of mitosis.