61. “The number of chiasmata depends on chromosomes” – What is the mistake in the given statement ?
A. Width of chromosome – Word in not mentioned
B. Size of chromosome – Word is not mentioned
C. Number of chromosome – Word is not mentioned
D. Length of chromosome – Word is not mentioned
Answer : Option D
62. Which is the true statement for mitosis ?
A. Cell formed by it performs diverse functions i.e. show division of labour
B. The number of chromosomes in the new cells are half than that of the parent cell.
C. Two cells are formed as a result of this division are identical in all aspects.
D. Cells formed as a result of mitosis have different genetic characters.
Answer : Option C
63. Which of the following statement is true for mitosis ?
A. Cytokinesis and karyokinesis occur together
B. Cytokinesis and karyokinesis are random
C. Cytokinesis preceedes karyokinesis
D. Karyokinesis preceedes cytokinesis
Answer : Option D
64. During interphase.......
A. Replication of DNA occurs.
B. Chromosomes can be observed only as chromatin.
C. Replication of centriole
D. All the above
Answer : Option B
65. Indentify the correct sequence of karyokinesis stages :
A. Prophase, Anaphase, Metaphase, Telophase
B. Prophase, Metaphase, Anaphase, Telophase
C. Prophase, Telophase, Metaphase, Anaphase
D. Prophase, Metaphase, Telophase, Anaphase
Answer : Option B
66. Which of the following cell can complete one cell cycle in 90 minutes ?
67. Which plant material is best suited for studying mitosis in class room ?
68. Mitosis can occur in
A. Haploid and diploid cells both
B. Pollen mother cells
C. Haploid cell only
D. Diploid cell only
Answer : Option A
69. Genetic homogeneity and exact similarity between chromosomes of various cell within the same type of issue of plant is due to :
70. Spindle fibres are composed of :