CBSE Class 9 Science Cell: The Building Block of Life (Class 9 NCERT New) Quiz 10

1. What is the typical diameter range of a prokaryotic cell?

A 10 to 100 μm B 1 to 10 μm C 100 to 500 μm D 0.1 to 0.5 nm

2. What is the typical diameter range of an ordinary eukaryotic cell?

A 1 to 10 μm B 10 to 100 μm C 1 to 10 mm D 200 to 500 μm

3. Where do most cellular metabolic activities take place directly in a prokaryotic cell?

A Inside the chloroplast B Within the nuclear matrix C Directly in the cytoplasm D Inside the vacuole

4. Which of the following are acellular infectious agents that lack a cellular structure entirely?

A Bacteria B Yeasts C Viruses, viroids, and prions D Protozoans

5. What is a virus structurally composed of?

A Protein and lipid layer only B Genetic material enclosed within a protein coat C Misfolded carbohydrates D Cellulose cell walls

6. What defining structural component does a viroid lack when compared to a standard virus?

A Genetic material B Protein coat C Enzymes D Cytoplasm

7. What are prions?

A Infectious single-stranded RNA molecules B Misfolded proteins that lack genetic material C Tiny unicellular thermophilic bacteria D Non-membranous plant organelles

8. What is the network of fine structural fibers in eukaryotic cells that supports shape and internal transport called?

A Endoplasmic reticulum B Cytoskeleton C Extracellular matrix D Chromatin

9. Non-living materials stored in plant cells, like starch grains or calcium oxalate crystals, are known as:

A Cell organelles B Cell inclusions C Vacuolar pigments D Nuclear pores

10. Which organelle is described as the "House of coded instructions" due to its role in containing genetic codes?

A Mitochondrion B Nucleus C Golgi body D Lysosome