Questions
1. What are the biopolymers constitute the major structural elements of living cells?
- [A] Proteins
- [B] Nucleic acids
- [C] Lipid
- [D] All
Answer: Option [D]
2. Which of the following is NOT a method for gene transfer in bacteria?
- [A] Translocation
- [B] Conjugation
- [C] Transformation
- [D] Transduction
Answer: Option [A]
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3. The cell wall of the prokaryotes is unique and is composed of ________.
- [A] Cellulose
- [B] Peptidoglycans.
- [C] Fungus cellulose
- [D] Peptide
Answer: Option [B]
4. Which of the following methods is used to determine bacterial numbers?
- [A] Turbidity
- [B] Serial dilution.
- [C] Direct microscopic counts.
- [D] All the above.
Answer: Option [D]
5. The primary bond of protein is _______ bond.
- [A] Ionic
- [B] Hydrophobic
- [C] Peptide
- [D] Disulfide
Answer: Option [C]
6. Which of the following amino acids is the smallest of all amino acids?
- [A] Gly.
- [B] Val.
- [C] Ala.
- [D] Ser.
Answer: Option [A]
7. Which of the following amino acids is actually an imino acid?
- [A] Glu.
- [B] Ala.
- [C] Pro.
- [D] Trp.
Answer: Option [C]
8. The two repeating subunits of the peptidoglycan layer are __________.
- [A] N-acetyl glucosamine.
- [B] N-acetyl muramic acid.
- [C] N-acetyl glycosamine
- [D] Both (A) and (B).
Answer: Option [D]
9. Organisms that can tolerate very low pH conditions are called ______.
- [A] acidophiles
- [B] thermophiles
- [C] hyperthermophiles
- [D] alkalinophiles
Answer: Option [A]
10. Which of the following belongs to continuous culture?
- [A] Turbidostat
- [B] Chemostat
- [C] Both (A) and (B).
- [D] All the above.
Answer: Option [D]
11. A culture medium which contains known specific kinds and amounts of chemicals is a _______ medium.
- [A] liquid
- [B] solid
- [C] selective
- [D] defined synthetic.
Answer: Option [D]
12. Temperatures can control bacteria because of _________.
- [A] freezing
- [B] denature protein.
- [C] melting
- [D] no reaction
Answer: Option [B]
