Tag: GATE Life Science Previous Year Papers with Solutions

Q.82 Which one of the following pairs of bacterial species fixes atmospheric Nitrogen?(A) Clostridia and Rhizobia(B) Clostridia and Lactobacillus(C) Rhizobia and Enterococcus(D) Actinomycetes and Mycoplasma The correct answer is (A) Clostridia […]

Q.81 An E.coli mutant defective for an enzyme is unable to grow on acetate but grows on glycerol as thesole carbon source. Which ONE of the following enzymes is likely to […]

Q.60 Which two of the following are the INCORRECT statements? P. All plants fix CO2 by the action of ribulose biphosphate carboxylase. The reaction occurs in the bundle sheath of […]

Q.59 Identify the correct matching by taking one item from each column Column – I Column – II Column – III P. Morphine Q. Nicotine R. Atropine S. Vinblastine 1. […]

Q.58 Which two of the following are the CORRECT statements ? P. Nondisjunction in the parental meiosis is not essential to produce diploid organisms Q. Nondisjunction in the parental meiosis […]

Q.57 A plant of genotype GGHH is crossed with another plant of the genotype gghh. If the F1 is test crossed, what percentage (%) of the test cross progeny will […]

Q.56 Identify the floral formula with the family and the corresponding plant species General Floral Formula Family Plant P. ⊕ ⚥ P0 or 2-3, A3 or 3+3, G1 or (3) […]

Q.55 In naturally occurring cytoplasmic male sterility, the molecular determinant is located in (A) Chloroplast (B) Endoplasmic reticulum (C) Golgi complex (D) Mitochondria Cytoplasmic Male Sterility: Molecular Determinant Revealed Cytoplasmic […]

Q.54 For successful transfer of a foreign gene from the engineered Ti-plasmid to the plant genome, few cis-acting DNA elements and trans-acting protein factors are very much essential. Select the […]

Q.53 The two enzymes commonly used for isolation of protoplasts from plants are (A) Cellulase and Lipase (B) Cellulase and Amylase (C) Pectinase and Cellulase (D) Pectinase and Lipase Plant […]