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Q.47 Yellow fever is caused due to the human-to-human transmission by- 1. Aedes aegypti 2. Culex 3. Dermacentor andersoni 4. Mycobacterium tuberculosis Yellow fever spreads human-to-human via Aedes aegypti mosquitoes, […]

Q.46 Arrange the steps involved in Gram-stain procedure- (A). Staining with Crystal Violet (B). Staining with Gram’s lodine (C). Decolorization (D). Staining with Safranine 1. (A), (B), (C), (D) 2. […]

Q.45 Antibody formed immediately after infection is- 1. IgM 2. IgG 3. IgD 4. IgE Title: First Antibody After Infection: IgM Primary Response Explained (MCQ Solved) The antibody formed immediately after […]

Q.44 Vaccine is not available for which disease- 1. Hepatitis B 2. Influenza 3. AIDS 4. Mumps No vaccine is available for AIDS (HIV), despite ongoing trials, while effective vaccines […]

Q.43 Match List I with List II List I List II A. D’Herelle and Twort I. Bacterial transformation B. Beadle and Tatum II. Penicillin C. Fleming III. One-gene-one-enzyme hypothesis D. […]

Q.42 Lederberg and Tatum describe the phenomena of- 1. Transformation 2. Conjugation 3. Mutation 4. Transversion Title: Lederberg and Tatum Experiment: Discovery of Bacterial Conjugation Explained Lederberg and Tatum described bacterial conjugation, […]

Q.41 Which of the following are viral diseases- (A). Yellow fever (B). Hepatitis B (C). Chickenpox (D). Rabies 1. (A), (B) and (D) only. 2. (A), (B) and (C) only. […]

40. Which of the following is the example of Gram-negative bacteria? Lactobacillus Escherichia coli Bacillus subtilis Staphylococcus aureus Escherichia coli is the classic example of a Gram-negative bacterium among the […]

39. What is the function of DNA gyrase in circular DNA? Negative supercoiling Positive supercoiling DNA packaging DNA degradation DNA gyrase, a type II topoisomerase in bacteria, primarily introduces negative […]