Chapter Exam

Chapter 2: Microscopy — Online MCQ Test

Q: Which part of the compound microscope is used to collect and focus light on the specimen?

Answer: B. Condenser — The condenser concentrates and focuses light onto the specimen for better illumination.

Q: The numerical aperture of a lens mainly affects the microscope’s

Answer: B. resolving power — A higher numerical aperture improves resolving power and the ability to distinguish fine details.

Q: A student wants to observe the internal details of a bacterial cell with the greatest clarity. Which microscope is most suitable?

Answer: C. Transmission electron microscope — A transmission electron microscope gives very high resolution and is best for viewing internal structures.

MICROBIOLOGY · CLASS 12th · Tamil Nadu State Board

Practice Chapter 2: Microscopy with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 12th MICROBIOLOGY. This chapter covers: Focusing on the primary visual tool of microbiologists this chapter covers optics magnification and resolving power. It examines different microscopy techniques including light pha.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 2: Microscopy — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 12th MICROBIOLOGY — Chapter 2: Microscopy, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the main purpose of a microscope in microbiology?

A. To increase the size of tiny objects for better viewing ✓
B. To change the chemical nature of cells
C. To destroy microorganisms
D. To measure the mass of cells

Answer: A. To increase the size of tiny objects for better viewing
A microscope magnifies very small objects so that they can be seen clearly by the human eye.

Which part of the compound microscope is used to collect and focus light on the specimen?

A. Stage
B. Condenser ✓
C. Arm
D. Revolving nosepiece

Answer: B. Condenser
The condenser concentrates and focuses light onto the specimen for better illumination.

The numerical aperture of a lens mainly affects the microscope’s

A. color of image
B. resolving power ✓
C. field of view only
D. thickness of slide

Answer: B. resolving power
A higher numerical aperture improves resolving power and the ability to distinguish fine details.

A student wants to observe the internal details of a bacterial cell with the greatest clarity. Which microscope is most suitable?

A. Simple light microscope
B. Phase-contrast microscope
C. Transmission electron microscope ✓
D. Stereomicroscope

Answer: C. Transmission electron microscope
A transmission electron microscope gives very high resolution and is best for viewing internal structures.

A microbiologist wants to observe a specimen that is too small for a light microscope and also needs very high resolution. Which option is the best choice?

A. Phase-contrast microscope because it works on living cells
B. Transmission electron microscope because it provides high resolving power ✓
C. Simple microscope because it has fewer lenses
D. Compound microscope because it uses visible light

Answer: B. Transmission electron microscope because it provides high resolving power
When extremely fine detail and high resolution are required, a transmission electron microscope is the best choice.