Last seen: Jan 13, 2022
(d) If both the Assertion and Reason are incorrect. Explanation: Interkinesis or interphase II is a period of rest that cells of some species ente...
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion. Explanation: During zygotene, because of the...
(c) If Assertion is correct but Reason is incorrect. Explanation: Previously interphase is called resting stage because there is no apparent activ...
Correct option: (a) Explanation: Meiosis II is known as equational or homotypic division like mitosis. It ensures the maintenance of constant numb...
(c) If the Assertion is correct but Reason is incorrect. Explanation: Synapsis occurs during zygotene stage. Synapsis is the pairing of homologous...
(c) A – IV; B – III; C – II; D – I Explanation: Metaphase – Chromosomes are moved to spindle fibre. Anaphase – Centromere splits and chromatids...
(a) 7 Explanation: In mitosis, a single cell divides to form two daughter cells. So, the number of mitotic divisions can be calculated by 2n. wh...
(b) Zygotene Explanation: During zygotene, a substage of Prophase I of meiosis I, where chromosomes start pairing together is called synapsis. Suc...
(d) anaphase II
(d) plastids Explanation: Many cells function properly and divide mitotically even in the absence of plastids.
(d) Zygotene and S phase (of interphase prior to prophase I) Explanation: In bivalent formation of chromosomes during meiosis, the homologous chro...
(a) Decondensation from chromosomes and reassembly of the nuclear lamina. Explanation: In most eukaryotes, the nuclear envelope that separates the...
(b) pachytene Explanation: Synapse stabilizes the paired condition of chromosomes in zygotene stage. After this the cell enters the pachytene stag...
(a) tubulin Explanation: Spindle fibres of mitotic cells are made up of microtubules. It consists of protein tubulin that maintain cell shape, ser...
(c) Prophase Explanation: Colchicine is an alkaloid derived from (colchicum autumnale) arrests the spindle formation at the end of prophase. Hence...
(c) G1 - S - G2 - M Explanation: The correct sequence of cell cycle is G1, S, G2 and M.
(c) If Assertion is correct but Reason is incorrect. Explanation: In a DNA molecule, A-T rich parts melt before G-C rich parts because there are t...
Correct option: (b) Explanation: In polysaccharides, individual monosaccharide is linked by glycosidic bond. This bond is formed between two carbo...
(c) If Assertion is correct but Reason is incorrect. Explanation: Prosthetic group is an organic substance which is thermostable and firmly attach...
Correct option:(b) Explanation: Comparative biochemistry provides a strong evidence for common ancestors of living beings (e.g. proteins lymph, en...