Botany-CPMT MCQ Question and Answer
Botany-CPMT MCQ Question and Answer
71. Long dark periods of short day plants (SDPs), if interrupted by a brief exposure of red light (660 µ) the flowering is—
- Inhibited
- Vigorous
- Promoted
- None of the above
72. Number of chromatids per chromosome complex at metaphase is—
- Two in mitosis and one in meiosis
- Two in mitosis and four in meiosis
- Four in mitosis and two in meiosis
- Two in both mitosis and meiosis
73. The dark staining region in a chromosome is called—
- Euchromatin
- Heterochromatin
- Paracentric
- Pericentric
74. Plastids are not found in—
- Gram positive bacteria
- Gram negative bacteria
- Fungi
- All of the above
75. The number of chromosomes in Pinus pollen grain in 12, the number of chromosomes in the endosperm of its own is—
- 6
- 12
- 24
- 36
76. During protein synthesis in prokaryotes, the initiation of polypeptide chain is induced
by—
by—
- Serine
- Lysine
- Methionine
- Leucine
77. In Oxalis, the flowers open in the morning and close during evening because of—
- Phototropism
- Phototaxis
- Photonasty
- Nyctinasty
78. Conjoint, collateral, open and endarch vascular bundles are found in—
- Dicot root
- Dicot stem
- Monocot root
- Monocot stem
79. Spraying of DDT produces pollution of—
- Air only
- Airal water
- Air and soil
- Air, water and soil