Question
Which group of structures are visible in a suitably stained plant cell using a high power (x400) light microscope?
Answer/Explanation
Answer : D
Question
The magnification of the photomicrograph is ×4000.
What is the actual size of the nucleolus?
A 1μm B 2μm C 5μm D 20μm
▶️Answer/Explanation
Ans: B
Question
A microscope has a resolution of 200 nm. Which of the following organelles would not be
resolved using this microscope?
A chloroplasts
B lysosomes
C mitochondria
D ribosomes
Answer/Explanation
Answer D
Ribosomes would not be resolved using a microscope with a resolution of 200 nm because ribosomes are much smaller than 200 nm in size.
Question
The diagram shows a mitochondrion drawn from an electronmicrograph.
The length of the mitochondrion from X to Y is 3000nm.
What is the magnification of the drawing of the mitochondrion?
A ×100 B ×1000 C ×10 000 D ×100 000
Answer/Explanation
Ans: C
Question
The diagram shows a stage micrometer, with divisions 0.1mm apart, viewed through an eyepiece containing a graticule.
What is the area of the field of view of the microscope at this magnification? (π = 3.14)
- π × 12.5 × 12.5 = 4.9 × 102 µm2
- π × 50 × 50 = 7.9 × 103 µm2
- π × 125 × 125 = 4.9 × 104 µm2
- π × 250 × 250 = 2.0 × 105 µm2
Answer/Explanation
Ans:
C