A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.For each of the following multiple choice questions, choose the most appropriate answer :
1. Which of the following medium are used to differentiate the colonies of Vibrio cholerae and V parahaemolyticus?
A. Alkaline bile salt
B. Thiosulphate-citrate-bile-sucrose
C. MacConkey
D. All of the above
2. HIV can infect
A. Microglial cells
B. M (membranous) cells
C. CD4 + T lymphocytes
D. All of these
3. A cluster of polar flagella is called
A. lophotrichous
B. amphitrichous
C. monotrichous
D. petritrichous
4. More spoilage of eggs is caused by
A. bacteria than molds
B. molds than bacteria
C. synergistically
D. none of these
5. The solidifying agent commonly used in preparation of media is/are
A. agar
B. silica gel
C. both (a) and (b)
D. none of these
6. Which of the following biotypes of Vibrio cholerae are prevalent in India?
A. EI Tor
B. Classical
C. Both A and B
D. None of these
7. Mycoplasmas, rickettsiae, and chlamydiae are
A. types of fungi
B. small bacteria
C. species of protozoa
D. forms of viruses
8. Which of the following is capable of oxidizing sulfur to sulfates?
A. Thiobacillus thiooxidans
B. Desulfotomaculum
C. Rhodospirillum
D. Rhodomicrobium
9. Which of the following is/are included in Kingdom Prokaryotae?
A. Bacteria
B. Protozoa
C. Fungi
D. All of these
10. The method of successful treatment of botulism prior to appearance of botulism symptoms involve administration of
A. antibiotic
B. analgesic
C. antitoxin
D. antipyretic
11. Suppose a eukaryotic cell had a mutation that prevented the production of cytochrome c. As a result of this mutation, which of the following processes would not occur?
A. Cellular respiration
B. Photosynthesis
C. Mitosis
D. Cell wall synthesis
12. The oldest eukaryotic organisms are considered to be
A. diplomonads like Giardia
B. archaea
C. fungi
D. animals
13. All of the following are features of prokaryotes except
A. nitrogen fixation
B. photosynthesis
C. sexual reproduction
D. locomotion
14. Culture of tubercle bacilli may be positive if number of bacteria in the specimen is
A. as few as 1-4 per ml
B. as few as 5-9 per ml
C. as few as 10-100 per ml
D. as few as 125-200 per ml
15. The most popular method for typing of Pseudomonas aeruginosa is
A. antibiogram
B. serotyping
C. bacteriophage
D. pyocin
16. Which of the following structures is the smallest?
A. Viriod
B. Hydrogen atom
C. Bacterium
D. Mitochondrion
17. Which of the following organism is found at the initial stages in the batter of Idli?
A. Leuconostoc mesentroides
B. Aspergillus niger
C. Bacillus natio
D. None of these
18. Which of the following is considered the most unifying concept in biology?
A. Taxonomy
B. Anatomy
C. Genetics
D. Evolution
19. Which of the following factor is responsible for deciding whether an immunoglobulin will remain membrane bound or get secreted
A. RNA Splicing
B. Class switching
C. Differential RNA Processing
D. Allelic Exclusion
20. A special beer yeast of the bottom type is
A. S. cerevisiae
B. S. carlsbergensis
C. S. thermophillus
D. none of these
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