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Which one of the following uses inorganic compounds as an energy source?
(A) Heterotrophs
(B) Chemolithotrophs
(C) Chemoorganotrophs
(D) Photoheterotrophs
1 Answer Which one of the following double-stranded sequences will NOT be recognized by a Type IIP restriction endonuclease?
(A) 5′–GGTACC–3′
3′–CCTAGG–5′
(B) 5′–GGATCC–3′
3′–CCTAGG–5′
(C) 5′–CATATG–3′
3′–GTATAC–5′
(D) 5′–GATTTC–3′
3′–CTAAAG–5′
1 Answer The most abundant class of immunoglobulins in serum is __________.
(A) IgM
(B) IgA
(C) IgD
(D) IgG
1 Answer In which of the following processes is glutaraldehyde used as a sterilizing agent?
(A) Pasteurization
(B) Incineration
(C) Cold sterilization
(D) Autoclaving
1 Answer Who among the following scientists was the pioneer in the development of chemotherapy?
(A) Elie Metchnikoff
(B) Robert Koch
(C) Paul Ehrlich
(D) Ronald Ross
1 Answer Which one of the following organisms has axial filaments?
(A) Mycobacterium tuberculosis
(B) Pasteurella multocida
(C) Treponema pallidum
(D) Shigella dysenteriae
1 Answer Which one of the following bacterial species can cause atypical pneumonia?
(A) Chlamydia pneumoniae
(B) Streptococcus pneumoniae
(C) Klebsiella pneumoniae
(D) Haemophilus influenzae
1 Answer Which of the following combinations of plant secondary metabolites and their functions is/are CORRECT?
(A) Anthocyanin − Herbivore deterrence
(B) Pyrethrin − Insecticidal activity
(C) Phytoalexins − Antifungal activity
(D) Tannins − Pollinator attraction
1 Answer Identify the CORRECT combination(s) between the enzymes in Group 1 and the reactions in Group 2 they catalyze.
| Group 1 | Group 2 |
|---|---|
| (P) Superoxide dismutase | (i) Formation of hydrogen peroxide |
| (Q) Phosphoenolpyruvate carboxylase | (ii) Formation of oxaloacetate |
| (R) Ribulose 1,5-bisphosphate carboxylase/oxygenase | (iii) Formation of 3-phosphoglycerate |
| (S) Hexokinase | (iv) Formation of glucose-6-phosphate |
(A) P−iii, Q−ii, R−iv, S−i
(B) P−i, Q−ii, R−iii, S−iv
(C) P−ii, Q−iv, R−i, S−iii
(D) P−i, Q−iii, R−ii, S−iv
1 Answer Identify the CORRECT combination(s) of plant natural products and the categories they belong to.
(A) Dhurrin − Phenolic compounds
(B) Farnesene − Terpenoids
(C) Naringenin − Cyanogenic glycosides
(D) Vincristine − Alkaloids
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