Chapter Exam

Chapter 10: Medical Virology — Online MCQ Test

Q: Which of the following is a characteristic feature of viruses?

Answer: A. They are acellular infectious agents — Viruses are acellular, meaning they do not have cellular organization. They require living host cells for replication.

Q: The protein coat that surrounds the genetic material of a virus is called the ______.

Answer: A. Capsid — The capsid is the protective protein coat of a virus. It encloses the viral nucleic acid.

Q: Viruses can multiply only in living cells because they lack ______.

Answer: C. Metabolic machinery — Viruses do not have the metabolic machinery needed for independent replication. They depend on host cell systems.

Q: Which of the following is NOT a viral structural component?

Answer: C. Ribosome — Viruses do not have ribosomes of their own. They depend on the host cell's ribosomes for protein synthesis.

MICROBIOLOGY · CLASS 12th · Tamil Nadu State Board

Practice Chapter 10: Medical Virology with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 12th MICROBIOLOGY. This chapter covers: Dedicated to acellular infectious agents this chapter explores viral structure classification replication cycles and pathogenesis. It examines major human viruses detailing transmi.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 10: Medical Virology — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 12th MICROBIOLOGY — Chapter 10: Medical Virology, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is a characteristic feature of viruses?

A. They are acellular infectious agents ✓
B. They have a true nucleus
C. They reproduce by binary fission
D. They can grow on ordinary nutrient agar

Answer: A. They are acellular infectious agents
Viruses are acellular, meaning they do not have cellular organization. They require living host cells for replication.

The protein coat that surrounds the genetic material of a virus is called the ______.

A. Capsid ✓
B. Cell wall
C. Mesosome
D. Nucleoid

Answer: A. Capsid
The capsid is the protective protein coat of a virus. It encloses the viral nucleic acid.

Viruses can multiply only in living cells because they lack ______.

A. Nucleic acid
B. Protein coat
C. Metabolic machinery ✓
D. Specific shape

Answer: C. Metabolic machinery
Viruses do not have the metabolic machinery needed for independent replication. They depend on host cell systems.

Which of the following is NOT a viral structural component?

A. Capsid
B. Envelope
C. Ribosome ✓
D. Nucleic acid

Answer: C. Ribosome
Viruses do not have ribosomes of their own. They depend on the host cell's ribosomes for protein synthesis.

Which statement about antiviral therapy is most accurate?

A. Antiviral drugs directly kill viruses outside the host cell
B. They often inhibit specific steps in viral replication ✓
C. They are effective against all viral infections equally
D. They work by destroying the viral capsid using enzymes produced by bacteria

Answer: B. They often inhibit specific steps in viral replication
Antiviral drugs usually act by blocking virus entry, replication, or release. They do not generally kill viruses directly outside host cells.