Which of the following does not occur during mitotic prophase?

(1) Disappearance of the nuclear envelope

(2) Chromosome condensation

(3) Migration of centrosomes towards the cell poles

(4) Synapsis of homologous chromosomes

Which of the following is not true for sister chromatids?

(1) They arise by replication during S phase

(2) They segregate from each other during each mitotic anaphase

(3) The usually contain identical versions of the same genetic information

(4) They segregate from each other during meiosis I

Which of the following statements is True?
(1) Cell plate represents the middle lamella between the walls of two adjacents cells
(2) At the time of cytokinesis, organelles like mitochondria and plastids get distributed between the daughter cells
(3) Cytokinesis in plant cell is centrifugal and takes place by cell-plate formation while animal cells by furrowing / cleavage and is centripetal
(4) All are correct

Crossing is an enzyme-mediated process. The enzyme is:

(1) DNA ligase      

(2) Recombinase  

(3) RNAase           

(4) DNAase

Match Column-I with Column-II:
Column-I                                                                               Column-II
I. Chromosomes are moved to spindle equator                        A. Pachytene
II. Centromere splits and chromatids apart                               B. Zygotene
III. Pairing between homologous chromosomes takes place    C. Anaphase
IV. Crossing between homologous chromosomes                    D. Metaphase

(1) I-A, II-B, III-C, IV-D                               

(2) I-B, II-C, III-D, IV-A

(3) I-D, II-C, III-B, IV-A                               

(4) I-C, II-A, III-D, IV-B

Which event is not associated with prophase I?

(a) Synizesis                   (b) Synapsis                   (c) Segregation     (d) Terminalization

A cell cycle includes:

1. Interphase + M-phase / divisional phase

2. Prophase + Metaphase + Anaphase + Telophase

3. G₁ + S + G₂ – phase

4. Karyokinesis + Cytokinesis

Interphase:
(1) Includes karyokinesis and cytokinesis
(2) Some time called resting phase, is the preparatory phase for division in which cell undergoes growth and DNA replication in an order
(3) Is the shortest phase in which biomolecules are synthesised very fast
(4) Includes 5% duration of the cell cycle

Which one is correct for Go stage?
I. It is a quiescent stage
II. In this phase cell cycle is stopped
III. G0 cells in this stage do not grow or proliferate but metabolically active
IV. G0 cells can divide in response to some stimulus

(1) All are correct                         

(2) I, II, III are correct

(3) I, II are correct                       

(4) Only I and IV are correct

At metaphase of mitosis, each chromosome consists of _______ chromatid(s) _______ centromere(s) ________ kinetochore(s) and _______ molecules of DNA:

(1) 2, 1, 2, 2        

(2) 2, 2, 2, 2       

(3) 2, 1, 1, 1                  

(4) 2, 1, 2, 1