Q.82 Which of the following statements about the primary and secondary adaptiveimmune responses to an antigen is/are correct?(A) IgM antibodies appear first in response to the initial exposure of the […]
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CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES (62)
GATE Life Science 2023 Previous Year Papers with Solutions
Antibiotics Isolated from Streptomyces spp
Q.81 Which of the following antibiotics is/are isolated from Streptomyces spp.?(A) Gentamicin(B) Nystatin(C) Polymyxins(D) Tetracyclines Gentamicin, Nystatin, and Tetracyclines are isolated from Streptomyces spp., while Polymyxins are not. The correct […]
GATE Life Science 2023 Previous Year Papers with Solutions
Non-Membrane Bound Inclusion Bodies in Prokaryotes
Q.80 Which of the following is/are non–membrane bound inclusion bodies?(A) Carboxysomes(B) Cyanophycin granules(C) Poly–β–hydroxybutyrate granules(D) Polyphosphate granules The correct answer is (B), (C), and (D). Carboxysomes (A) are membrane-bound (protein […]
GATE Life Science 2023 Previous Year Papers with Solutions
Which Genus is Spirochete
Q.79 Which of the following genus is/are a spirochete(s)?(A) Borrelia(B) Leptospira(C) Spirulina(D) Treponema Answer: (A), (B), and (D) Spirochetes belong to the phylum Spirochaetota, featuring Gram-negative, helical bacteria with axial […]
GATE Life Science 2023 Previous Year Papers with Solutions
Bacterial Conjugation Merozygote Formation
Q78 Which one of the following conjugations will result in formation of merodiploid? (A) F– donor × F– recipient (B) Hfr donor × F– recipient (C) F+ donor × F– […]
![Q.77 Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]. Assertion [a]: Endospore can survive heat that would rapidly kill vegetative cells of the same species. Reason [r]: In endospore, the protoplasm is reduced to minimum volume as a result of the accumulation of calcium-dipicolinic acid complexes and small acid-soluble spore proteins, which forms a cytoplasmic gel and a thick cortex. (A) Both [a] and [r] are true and [r] is the correct reason for [a] (B) Both [a] and [r] are true and [r] is not the correct reason for [a] (C) Both [a] and [r] are false (D) [a] is true but [r] is false](https://www.letstalkacademy.com/wp-content/uploads/2025/12/slide_77-2.png)
GATE Life Science 2023 Previous Year Papers with Solutions
Endospore Heat Resistance
Q.77 Determine the correctness or otherwise of the following Assertion [a] and theReason [r].Assertion [a]: Endospore can survive heat that would rapidly kill vegetative cells ofthe same species.Reason [r]: In […]
GATE Life Science 2023 Previous Year Papers with Solutions
First Labeled Metabolite Calvin Cycle
Q.76 A suspension of photosynthetic green algae was illuminated in the presence of14CO2 for few seconds. The first metabolite in the Calvin cycle to be radiolabeledwill be(A) glyceraldehyde(B) 1,3–bisphosphoglycerate(C) 3–phosphoglycerate(D) […]
GATE Life Science 2023 Previous Year Papers with Solutions
Antibiotic Resistance Mechanism in Microbes
Q.75 Which one of the following is NOT correct about antibiotic resistance mechanismin microbes?(A) Mycoplasma is naturally resistant to penicillins due to presence of R plasmid.(B) Gram–negative bacteria are impermeable […]
GATE Life Science 2023 Previous Year Papers with Solutions
Mastering Immunological Test Matching
Q74 | Match the test in Group I with its application in Group II Group I Group II P. Ouchterlony-Fulthorpe test Q. Limulus amoebocyte lysate test R. Weil-Felix reaction test […]
GATE Life Science 2023 Previous Year Papers with Solutions
Batch Culture of Microbes
Q.73 Which one of the following statements about batch culture of microbes is NOTcorrect?(A) Cells from stationary phase will show longer lag phase when inoculated in freshgrowth medium compared to […]
