MCQ The Fundamental Unit of Life-1
16. Amoeba acquires its food through a process, termed
(a) exocytosis
(b) endocytosis
(c) plasmolysis
(d) exocytosis and endocytosis both
Ans. (b) endocytosis
Explanation: The Term endocytosis is composed of two term, i.e. ‘endo’ means towards inside and ‘cytosis’ means movement related to cell.
17. Cell wall of which one of these is not made up of cellulose?
(a) Bacteria
(b) Hydrilla
(c) Mango tree
(d) Cactus
Ans. (a) Bacteria
Explanation: Other options show plants in which cell wall is made of cellulose. But cell wall of bacteria is made of peptidoglycan.
18. Silver nitrate solution is used to study
(a) endoplasmic reticulum
(b) golgi apparatus
(c) nucleus
(d) mitochondria
Ans. (b) golgi apparatus
Explanation: Camillo Golgi carried out ‘black reaction’ which involved use of silver nitrate. This helped him in staining individual nerve and cell structures.
19. Organelle other than nucleus, containing DNA is
(a) endoplasmic reticulum
(b) golgi apparatus
(c) mitochondria
(d) lysosome
Ans. (c) mitochondria
Explanation: Mitochondria and chloroplast contain DNA and hence have capability of replication.
20. Kitchen of the cell is
(a) mitochondria
(b) endoplasmic reticulum
(c) chloroplast
(d) golgi apparatus
Ans. (c) chloroplast
Explanation: Food is produced in plants inside chloroplasts. Hence, chloroplast is called the kitchen of the cell.
21. Lipid molecules in the cell are sythesized by
(a) smooth endoplasmic reticulum
(b) rough endoplasmic reticulum
(c) golgi apparatus
(d) plastids
Ans. (a) smooth endoplasmic reticulum
22. Cell arises from pre-existing cell was stated by
(a) Haeckel
(b) Virchow
(c) Hooke
(d) Schleiden
Ans. (b) Virchow
Explanation: This postulation of Virchow made an addition to the earlier cell theory.
23. Cell theory was given by
(a) Schleiden and Schwann
(b) Virchow
(c) Hooke
(d) Haeckel
Ans. (a) Schleiden and Schwann
Explanation: They were the first to propose the cell theory which stated that all plants and animals are made up of cell and cell is the basic unit of life.
24. The only cell organelle seen in prokaryotic cell is
(a) mitochondria
(b) ribosomes
(c) plastids
(d) lysosomes
Ans. (b) ribosomes
Explanation: Other cell organelles are absent in prokaryotic cells.
25. Organelle without a cell membrane is
(a) ribosome
(b) golgi apparatus
(c) chloroplast
(d) nucleus
Ans. (a) ribosome
Explanation: Other cell organelles are membrane – bound.
26. 1 μm is
(a) 10–6 m
(b) 10–9 m
(c) 10–10 m
(d) 10–3 m
Ans. (a) 10–6 m
27. Lysosome arises from
(a) endoplasmic reticulum
(b) golgi apparatus
(c) nucleus
(d) mitochondria
Ans. (b) golgi apparatus
28. Living cells were discovered by
(a) Robert Hooke
(b) Purkinje
(c) Leeuwenhoek
(d) Robert Brown
Ans. (c) Leeuwenhoek
Explanation: Robert Hooke was the first to observe cells but he observed dead cells of cork. It was Leeuwenhoek who was the first to observe living cells.
29. Select the odd one out
(a) The movement of water across a semipermeable membrane is affected by the amount
of substances dissolved in it.
(b) Membranes are made of organic molecules like proteins and lipids
(c) Molecules soluble in organic solvents can easily pass through the membrane.
(d) Plasma membranes contain chitin sugar in plants
Ans. (d) Plasma membranes contain chitin sugar in plants
Explanation: This is a wrong statement, while others are correct.
