Select the correct option from Column-I and Column-II.
Column-I Column-II
(A)Leptotene (p)Synapsis
(B)Zygotene (q)Formation of bipolar spindle
(C)Pachytene (r)Condensation of chromosones
(D)Diakinesis (s)Crossing over
A. (a)(A - s) (B - s) (C - p) (D - q)
B. (b)(A - r) (B - r) (C - s) (D - p)
C. (c)(A - r) (B - r) (C - s) (D - q)
D. (d)(A - q) (B - q) (C - s) (D - r)
Answer : Option C
Select the correct option from Column-I and Column-II.
Column-I Column-II
(A)G1 phase (p)Synthesis of new DNA
(B)G2 phase (q)Synthesis of DNA does not occur
(C)S phase (r)DNA synthesis stops
A. (a)(A - r) (B - p) (C - q)
B. (b)(A - p) (B - r) (C - q)
C. (c)(A - r) (B - q) (C - p)
D. (d)(A - q) (B - r) (C - p)
Answer : Option D
83. Due to crossing over, an opportunity for the exchange of genes becomes possible.
A. S - phase
B. Cell Cycle
C. Significance of meiosis
D. \(G_2\) phase
Answer : Option C
84. Which of the following statement is true for prophase ?
A. At the end of this phase chromosomes disappear.
B. In this phase condensation of chromosome takes place along their lengths.
C. At the end of this phase nuclear membrane is formed
D. Centriole divides and arranged on opposite pole.
Answer : Option B
85. Syncytium means........
A. small disc shaped structures at the surface of the centromeres.
B. a condition arises when karyokinesis is not followed by cytokinesis.
C. process of constriction of cytoplasm from peripheral region of cell that extends towards the centre.
D. a multinucleate condition arises when karyokinesis and cytokinesis is over.
Answer : Option B
86. In animal cell........
A. constriction of cytoplasm begins from the peripheral region of the cell.
B. middle lamella made up of pectin develops.
C. constriction of cytoplasm begins from the centre of the cell.
D. (a) and (b) both
Answer : Option C
87. Given below is a schematic break-up of the phases/stage of cell cycle :
A. C Karyokinesis
B. D Synthetic phase
C. A Cytokinesis Metaphase
D. B Metaphase
Answer : Option B
88. Spindle fibre shorten.
89. Nucleus is reformed
90. Pair of homologous chromosomes become arranged at the equatorial plane of the cell.