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Q.72 Phagocytosis was first described by(A) Elie Metchnikoff(B) Robert Hooke(C) Robert Koch(D) Paul Ehrlich Elie Metchnikoff first described phagocytosis. This process, where cells engulf particles or pathogens, forms the basis of […]

Q.71 Catabolite repression in bacteria is regulated by the concentration of(A) amino acids(B) glucose(C) messenger RNA(D) lactose The correct answer is (B) glucose. Catabolite repression enables bacteria like E. coli to prioritize […]

Q.70 The correct sequence of metabolic intermediates in Krebs cycle is(A) α–ketoglutarate → fumarate → succinate → malate(B) fumarate → malate → succinate → α–ketoglutarate(C) α–ketoglutarate → succinate → fumarate […]

Q.69 Microbial plastics are made from(A) polyhydroxyalkanoates(B) polystyrene(C) polyurethane(D) polyvinyl chloride Correct Answer: (A) polyhydroxyalkanoates Microbial plastics refer to biodegradable polymers synthesized by microorganisms, primarily bacteria, as intracellular carbon and […]

Q.68 Which one of the statements about bacterial flagella is correct?(A) Flagella varies in length ranging from 0.5 to 2 μm.(B) Flagella are adjacent fibrils with regular patterns.(C) Flagella helps […]

Q.67 Which one of the following converts sulfate to hydrogen sulfide?(A) Beggiatoa(B) Desulfovibrio(C) Thiobacillus(D) Thiothrix Desulfovibrio converts sulfate to hydrogen sulfide in microbial sulfur metabolism. This process, known as dissimilatory […]

Q.66 Monkey pox is caused by a(A) double–stranded DNA virus(B) single–stranded DNA virus(C) double–stranded RNA virus(D) single–stranded RNA virus Monkeypox is caused by a double-stranded DNA virus from the Orthopoxvirus […]

Q.65 The frequencies for autosomal alleles A and a are p = 0.5 and q = 0.5,respectively, where A is dominant over a. Under the assumption of randommating, the mating […]

Q.64 A cytoplasmic male–sterile female plant with the restorer (nuclear) genotype rris crossed to a male–fertile male plant with the genotype RR. Both RR and Rr canrestore the fertility, whereas […]

Q.63 In a diploid angiosperm species, flower colour is regulated by the R gene.RR and Rr genotypes produce red flowers, whereas the rr genotype produceswhite flowers. If two individual plants […]