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?

(1) Synizesis                  

(2) Synapsis                  

(3) Segregation    

(4) 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 about S-phase (synthetic phase)?
I. It occurs between G1 and G2
II. It marks the period during which DNA replicates
III. At the end of this phase DNA is doubled but the number of chromosomes remains unchanged
IV. As the DNA is doubled in this phase number of chromosomes is also doubled
V. Centrioles replicate in this phase
VI. Amount of DNA changes from 2C to 4C
VII. It is pre G2 and post G1 phase
(1) I, II, IV, V, VI, VII are correct                 

(2) I, II, III, V, VI, VII are correct

(3) All are correct                                       

(4) Only IV is correct

The sequence of events by which a cell duplicates its genome, synthesises other constituents of cells and eventually divides into daughter cells is termed as:

1. Interphase                                   

2. M-phase

3. Karyokinesis + Cytokinesis             

4. Cell cycle