Category: GATE Biotechnology Previous Year Papers with Solutions

10. Assertion (a): Gram negative bacteria show staining with saffranin. Reason (r): Gram negative bacteria have an outer membrane with lipopolysaccharides. (a) Both (a) and (r) are true and (r) […]

9. Which one of the following techniques can be used to determine the structure of 15 kDa globular protein at atomic resolution” (a) Raman spectroscopy (b) IR spectroscopy (c) UV […]

8. If the nucleotide composition (%) of a viral genome is A = 10, U = 20, C = 40 and G = 30, which one of the following is […]

7. Which one of the following mechanisms is used by human pathogens to evade host immune responses? (a) Somatic hypermutation (b) Antibody production (c) Antigenic variation (d) Complement activation Pathogens […]

6. limx → 0 sin(x) / x is __________. Related Keywords: sinc function limit, standard trigonometric limit, indeterminate form 0/0, calculus proof Correct Answer 1 Why Direct Substitution Fails Substituting […]

5. In a thin layer chromatography experiment using a silica gel plate, a compound showed migration of 12.5 cm and the solvent front showed migration of 18 cm. The Rf […]

4. The surface area (in m²) of the largest sphere that can fit into a hollow cube with edges of length 1 meter is __________. Given data: π = 3.14 […]

3. Which one of the following organisms in an indicator of fecal contamination” (a) Escherichia coli (b) Streptococcs lactic (c) Bacillus subtilis (d) Lactobacillus acidophilus Escherichia coli serves as the […]

2. Natural proteins are composed primarily of 20 α-amino acids. Which one of the following statements in true for any of these amino acids in a solution of pH 1.5? […]

1. An enzyme catalyzes a reaction by (a) decreasing the energy of the substrate. (b) deveasing the activation energy of the reaction. (c) decreasing product stability. (d) increasing the activation […]