Biology Class 11th Chapter 8 mcqs

1. The cytoplasmic connections from cell to cell are known as

(a) middle lamella

(b) plasmodesmata

(c) cell membrane system

(d) endoplasmic reticulum

Answer: (b) plasmodesmata

2. Bacterial flagella is made up of

(a) tubulin

(b) flagellin

(c) chitin

(d) None of these

Answer

Answer: (b) flagellin

3. Plasmolysis occurs due to-

(a) Absorption

(b) Endosmosis

(c) Osmosis

(d) Exosmosis

Answer: (d) Exosmosis

4. The term Cell was given by-

(a) Leeuwenhoek

(b) Robert hooke

(c) Flemming

(d) Robert Brown

Answer: (b) Robert hooke

5. Which one of the following also acts as a catalyst in a bacterial cell?

(a) 23 sr RNA

(b) 5 sr RNA

(c) sn RNA

(d) hn RNA

Answer: (a) 23 sr RNA

6. Centrosome is found in-

(a) Cytoplasm

(b) Nucleus

(c) Chromosomes

(d) Nucleolus

Answer: (a) Cytoplasm

7. Plasma membrane is

(a) impermeable

(b) semi-permeable

(c) completely permeable

(d) differentially permeable

Answer: (b) semi-permeable

8. Middle lamella is made up of ___________.

(a) calcium sulphide

(b) calcium pectate

(c) calcium carbonate

(d) calcium chloride

Answer: (b) calcium pectate

9. Match the columns.
10. Cytoskeleton – A. hair-like outgrowth
11. Flagella – B. proximal region of centriole
12. Hub – C. bristle-like structures
13. Fimbriae – D. filamentous protein structure

(a) 1-D, 2-A, 3-B, 4-C

(b) 1-D, 2-C, 3-B, 4-A

(c) 1-B, 2-D, 3-A, 4-C

(d) 1-D, 2-A, 3-C, 4-B

Answer: (a) 1-D, 2-A, 3-B, 4-C

10. Which of the following does not have cell wall?

(a) Mycoplasma

(b) Bacteria

(c) PPLO

(d) Blue green algae

Answer: (a) Mycoplasma

11. Centrosome is found in-

(a) Cytoplasm

(b) Nucleus

(c) Chromosomes

(d) Nucleolus

Answer: (a) Cytoplasm

12. The longest cell in human body is

(a) red blood cells

(b) white blood cells

(c) columnar epithelial cells

(d) nerve cells

Answer: (d) nerve cells

13. The main site for synthesis of lipids is

(a) vacuoles

(b) RER

(c) SER

(d) Golgi body

Answer: (c) SER

14. The function of ribosomes is

(a) metabolism

(b) lipid synthesis

(c) protein synthesis

(d) photosynthesis

Answer: (c) protein synthesis

15. Which is called Suicidal Bag?

(a) Centrosome

(b) Lysosome

(c) Mesosome

(d) Chromosome

Answer: (b) Lysosome

16. A nucleosome is a portion of the chromonema containing ______.

(a) both DNA and histones

(b) only histones

(c) both DNA and RNA

(d) only DNA

Answer: (a) both DNA and histones

17. The largest cell in the human body is-

(a) Nerve cell

(b) Muscle cell

(c) Liver cell

(d) Kidney cell

Answer: (a) Nerve cell

18. Keeping in view the fluid mosaic model for the structure of cell membrane, which one of the following statements is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?

(a) Neither lipids, nor proteins can flip-flop

(b) Both lipids and proteins can flip-flop

(c) While lipids can rarely flip-flop, proteins can not

(d) While proteins can flip-flop, lipids can not

Answer: (c) While lipids can rarely flip-flop, proteins can not

19. Cell secretion is done by-

(a) Plastids

(b) ER

(c) Golgi apparatus

(d) Nucleolus

Answer: (c) Golgi apparatus

20. ___________ increases the surface area for mitochondrial activity.

(a) Inner membrane

(b) Inter membrane space

(c) Matrix

(d) Cristae

Answer: (d) Cristae