Assignments Class 11 Biology Cell Cycle and Cell Division

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Cell Cycle and Cell Division Assignments Class 11 Biology

Question. In which phase of mitosis, chromosomes loose their individuality –
(a) Prophase
(b) Metaphase
(c) Anaphase
(d) Telophase

Question. The movement of homologous chromosomes towards opposite poles occur by shortening of spindle fibre during :-
(a) Anaphase-II
(b) Anaphase-I
(c) Telophase
(d) Metaphase-I

Question. Chromatin condensation and movement of duplicated centriole towards opposite pole can be observed during-
(a) Prophase
(b) Metaphase
(c) Anaphase
(d) Telophase

Question. Select the odd one –
(a) Zygotene – Synaptonemal complex appearance
(b) Pachytene – Appearance of recombination nodule
(c) Diplotene – Terminalisation of chiasmata
(d) Diakinesis – Assembly of meiotic spindle

Question. In human being which cell(s) do/does not show division-
(1) Heart cell
(2) Muscle cell
(3) Nerve cell
(a) only 1
(b) only 1 and 2
(c) only 1 and 3
(d) 1, 2 and 3

Question. Mark incorrect statements :-
(A) Meiosis involves only a single cycle of DNA replication
(B) Four haploid cells are formed at the end of meiosis-I
(C) Mitosis may occurs in haploid and diploid cells
(D) In yeast, cell cycle takes about 90 minutes.
(a) A and B
(b) A and C
(c) Only B
(d) All are correct

Question. Match the following –

(a) Metaphase- I	(I) Splitting of centromere of each chromosome
(b) Anaphase – I	(II) Separation of homologous chromosomes
(c) Telophase – I	(III) Alignment of bivalents on equatorial plate
(d) Anaphase -II	(IV) Appearance of diad of cells

(a) III II IV I
(b) II III IV I
(c) IV III II I
(d) I II III IV

Question. Which of the following organelles or components can be observed in cell even after completion of prophase-
(a) Golgi complex
(b) Endoplasmic reticulum
(c) Nucleolus
(d) Mitochondria

Question. It is significant to note that in the 24 hour average duration of cell cycle of human cell, cell division proper lasts for only about :-
(a) Four hours
(b) 90 minutes
(c) An hour
(d) 10 hours

Question. Regarding key features of meiosis select out the wrong one –
(a) Meiosis involves two sequential cycles of nuclear and cell division called meiosis- I & meiosis- II
(b) Meiosis is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the S – Phase
(c) Meiosis involves pairing of homologous chromosomes and recombination between non homologous chromosome
(d) Four haploid cells are formed at the end of meiosis-II

Question. In which stage of mitotic division, cells do not show Golgicomplex, ER, nucleolus and nuclear envelope –
(a) Metaphase
(b) Late prophase
(c) Anaphase
(d) All of these

Question. Which of the following phase corresponds to interval between mitosis and initiation of DNA replication –
(a) G₁ phase
(b) G₂ phase
(c) S – phase
(d) M – phase

Question. If there are 16 chromosomes in each root cell of onion, then what will be the number of chromosome in G₁ phase and G₂ phase respectively –
(a) 32 & 16
(b) 16 & 32
(c) 16 & 16
(d) 32 & 32

Question. Match the columns :-

Column I	Column II
A. Leptotene	(i) Compaction of chromosomes
B. Zygotene	(ii) Recombination nodule
C. Pachytene	(iii) Synapsis
D. Diplotene	(iv) Terminalisation of chiasmata
E. Diakinesis	(v) Dissolution of synaptonemal complex

(a) A-i, B-iii, C-ii, D-v, E-iv
(b) A-i, B-ii, C-iii, D-v, E-iv
(c) A-v, B-iii, C-ii, D-i, E-iv
(d) A-iii, B-ii, C-v, D-iv, E-i

Question. “X-shaped structures” occurs during which phase of meiotic division –
(a) Prophase I
(b) Metaphase I
(c) Anaphase II
(d) Telophase I

Question. Interkinesis is stage between :-
(a) Two mitotic divisions
(b) Two phases of meiotic divisions
(c) Anaphase and telophase
(d) Leptotene and zygotene

Question. ‘Dyad of cell’ form after :
(a) Anaphase-I
(b) Telophase-I
(c) Telophase-II
(d) Anaphase-II

Question. Quiescent stage is :- 

(a) A
(b) B
(c) D
(d) E

Question. DNA replication occurs in ……… phase :-
(a) A
(b) B
(c) C
(d) E

Question. Heart cells are found in …… phase :-
(a) E
(b) D
(c) C
(d) B

Question. Cell differentiates in …… phase :-
(a) C
(b) E
(c) B
(d) D

Question. Which phase shows structured chromosomes –
(a) B
(b) D
(c) C
(d) E

Question. Centriole duplicates in …… phase :-
(a) B
(b) C
(c) A
(d) D