1. Which of the following is used to treat fungal infections?
A. Penicillin
B. Fluconazole
C. Amoxicillin
D. Azithromycin
Answer: b) Fluconazole
Rationale: Fluconazole is an antifungal medication used to treat various fungal
infections.
2. What is the primary function of ribosomes in bacteria?
A. Synthesize proteins
B. Replicate DNA
C. Produce ATP
D. Store genetic material
Answer: a) Synthesize proteins
Rationale: Ribosomes are responsible for protein synthesis in cells.
3. Which of the following is a characteristic of viruses?
A. They can be treated with antibiotics.
B. They contain both DNA and RNA.
C. They replicate inside a host cell.
D. They have a cellular structure.
Answer: c) They replicate inside a host cell.
Rationale: Viruses can only replicate inside host cells, as they lack the machinery to
replicate on their own.
4. Which of the following is a characteristic of prokaryotic cells?
A. Presence of a nucleus
B. Lack of a membrane-bound nucleus
C. Presence of mitochondria
D. Presence of a nuclear membrane
Answer: b) Lack of a membrane-bound nucleus
Rationale: Prokaryotic cells do not have a membrane-bound nucleus; their genetic
material is located in the nucleoid region.
5. Which organism is responsible for causing tuberculosis?
A. Streptococcus pneumoniae
B. Mycobacterium tuberculosis
C. Escherichia coli
D. Clostridium botulinum
Answer: b) Mycobacterium tuberculosis
Rationale: Mycobacterium tuberculosis is the bacterium responsible for causing
tuberculosis, a lung disease.
6. Which of the following is a feature of the lytic cycle of bacteriophages?
A. The viral genome integrates into the host's genome.
B. The host cell is not destroyed.
C. New virus particles are released by host cell lysis.
, D. The host cell enters a dormant state.
Answer: c) New virus particles are released by host cell lysis.
Rationale: In the lytic cycle, the viral genome replicates within the host cell, causing the
cell to burst (lyse) and release new viruses.
7. Which of the following viruses causes the disease known as "chickenpox"?
A. Herpes simplex virus
B. Varicella-zoster virus
C. Epstein-Barr virus
D. Cytomegalovirus
Answer: b) Varicella-zoster virus
Rationale: Varicella-zoster virus causes chickenpox, a highly contagious disease
characterized by an itchy rash.
8. Which of the following is a characteristic of viruses?
A. They can replicate independently.
B. They contain both DNA and RNA.
C. They are made up of a protein coat and nucleic acid.
D. They can carry out metabolic processes on their own.
Answer: c) They are made up of a protein coat and nucleic acid.
Rationale: Viruses consist of a protein coat (capsid) and either DNA or RNA but do not
carry out metabolic processes independently.
9. Which of the following is an example of a viral infection?
A. Tuberculosis
B. Hepatitis
C. Malaria
D. Tetanus
Answer: b) Hepatitis
Rationale: Hepatitis is caused by a viral infection, specifically by the Hepatitis virus (A,
B, C, etc.).
10. What is the primary function of the bacterial pili (fimbriae)?
A. Motility
B. Protein synthesis
C. Attachment to surfaces
D. DNA replication
Answer: c) Attachment to surfaces
Rationale: Pili (fimbriae) are used by bacteria to adhere to surfaces, tissues, or other
bacteria, which is important for infection.
11. What is the mechanism of action for penicillin?
A. Inhibits protein synthesis
B. Inhibits DNA replication
C. Disrupts the cell wall synthesis
D. Inhibits RNA transcription
Answer: c) Disrupts the cell wall synthesis
Rationale: Penicillin works by inhibiting the synthesis of peptidoglycan, a crucial
component of bacterial cell walls, leading to cell lysis.
A. Penicillin
B. Fluconazole
C. Amoxicillin
D. Azithromycin
Answer: b) Fluconazole
Rationale: Fluconazole is an antifungal medication used to treat various fungal
infections.
2. What is the primary function of ribosomes in bacteria?
A. Synthesize proteins
B. Replicate DNA
C. Produce ATP
D. Store genetic material
Answer: a) Synthesize proteins
Rationale: Ribosomes are responsible for protein synthesis in cells.
3. Which of the following is a characteristic of viruses?
A. They can be treated with antibiotics.
B. They contain both DNA and RNA.
C. They replicate inside a host cell.
D. They have a cellular structure.
Answer: c) They replicate inside a host cell.
Rationale: Viruses can only replicate inside host cells, as they lack the machinery to
replicate on their own.
4. Which of the following is a characteristic of prokaryotic cells?
A. Presence of a nucleus
B. Lack of a membrane-bound nucleus
C. Presence of mitochondria
D. Presence of a nuclear membrane
Answer: b) Lack of a membrane-bound nucleus
Rationale: Prokaryotic cells do not have a membrane-bound nucleus; their genetic
material is located in the nucleoid region.
5. Which organism is responsible for causing tuberculosis?
A. Streptococcus pneumoniae
B. Mycobacterium tuberculosis
C. Escherichia coli
D. Clostridium botulinum
Answer: b) Mycobacterium tuberculosis
Rationale: Mycobacterium tuberculosis is the bacterium responsible for causing
tuberculosis, a lung disease.
6. Which of the following is a feature of the lytic cycle of bacteriophages?
A. The viral genome integrates into the host's genome.
B. The host cell is not destroyed.
C. New virus particles are released by host cell lysis.
, D. The host cell enters a dormant state.
Answer: c) New virus particles are released by host cell lysis.
Rationale: In the lytic cycle, the viral genome replicates within the host cell, causing the
cell to burst (lyse) and release new viruses.
7. Which of the following viruses causes the disease known as "chickenpox"?
A. Herpes simplex virus
B. Varicella-zoster virus
C. Epstein-Barr virus
D. Cytomegalovirus
Answer: b) Varicella-zoster virus
Rationale: Varicella-zoster virus causes chickenpox, a highly contagious disease
characterized by an itchy rash.
8. Which of the following is a characteristic of viruses?
A. They can replicate independently.
B. They contain both DNA and RNA.
C. They are made up of a protein coat and nucleic acid.
D. They can carry out metabolic processes on their own.
Answer: c) They are made up of a protein coat and nucleic acid.
Rationale: Viruses consist of a protein coat (capsid) and either DNA or RNA but do not
carry out metabolic processes independently.
9. Which of the following is an example of a viral infection?
A. Tuberculosis
B. Hepatitis
C. Malaria
D. Tetanus
Answer: b) Hepatitis
Rationale: Hepatitis is caused by a viral infection, specifically by the Hepatitis virus (A,
B, C, etc.).
10. What is the primary function of the bacterial pili (fimbriae)?
A. Motility
B. Protein synthesis
C. Attachment to surfaces
D. DNA replication
Answer: c) Attachment to surfaces
Rationale: Pili (fimbriae) are used by bacteria to adhere to surfaces, tissues, or other
bacteria, which is important for infection.
11. What is the mechanism of action for penicillin?
A. Inhibits protein synthesis
B. Inhibits DNA replication
C. Disrupts the cell wall synthesis
D. Inhibits RNA transcription
Answer: c) Disrupts the cell wall synthesis
Rationale: Penicillin works by inhibiting the synthesis of peptidoglycan, a crucial
component of bacterial cell walls, leading to cell lysis.
