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Q.21 Adenine constitutes 0.16 mole fraction in a given single–stranded DNA. What isthe mole fraction of uracil in the resultant RNA, if this entire DNA fragment istranscribed?(A) 0.16(B) 0.32(C) 0.34(D) […]

Q.20 Competition between two populations in an ecosystem is(A) beneficial (+) to both the populations(B) deleterious (˗) to both the populations(C) beneficial (+) to one population, but deleterious (˗) to […]

Q.19 Which of the following is NOT a characteristic morphological feature ofapoptotic cells?(A) Disassembly of nuclear envelope(B) DNA fragmentation(C) Increased cell size(D) Membrane blebbing Answer: (C) Increased cell size Apoptotic […]

Q.18 Which one of the following genetic crosses and their results indicatescytoplasmic inheritance?(A) Wild–type male  mutant female → 100% progeny are mutant(B) Wild–type male  mutant female → 25% […]

Q.17 Match the morphology in Group I with the corresponding microorganismin Group IIGroup I                                  […]

Q.16 Determine the correctness or otherwise of the following Assertion [a] and theReason [r].Assertion [a]: The resolving power of a transmission electron microscope ishigher than that of the light microscope.Reason […]

Q.15 Which one of the following immunoglobulins crosses the human placenta?(A) IgA(B) IgE(C) IgG(D) IgM IgG is the immunoglobulin that crosses the human placenta, providing passive immunity to the fetus. This […]

Q.14 Which one of the following hormones is a tyrosine derivative?(A) Epinephrine(B) Estradiol(C) Progesterone(D) Testosterone Epinephrine is the correct answer (A). It serves as the sole tyrosine-derived hormone among the […]

Q.13 Which one of the following statements about polyploidy is correct?(A) Autopolyploids are derived from a single species(B) Autopolyploids are derived from two different species(C) Allopolyploids are derived from a […]

Q.12 The correct hierarchy of taxa in the Linnaean classification of eukaryotes is(A) kingdom, class, phylum, order, family, genus(B) kingdom, order, class, phylum, family, genus(C) kingdom, phylum, order, family, class, […]