Cell Membrane Multiple Choice Questions Pdf:
Introduction:
- Cell membrane is also called a biological membrane or Biomembrane.
- Cell membrane thin, a film-like structure encloses to the cytoplasm in the cell.
- The cell membrane is visible only under the electron microscope.
- Normally the cell membrane is made up of a double layer of phospholipids, thereby protecting the cell from the surrounding environment and protecting it.
- The cell membrane consists of Lipids (20-40%), Proteins (60-80%), Carbohydrates (1-5%).
- Nageli and Cramer 1885 used the term cell membrane for outermost thin covering.
- In 1926 Gorter and Grendel proposed that cell membrane contains lipid bilayers.
- In 1972 Singer and Nicholson proposed the universally accepted model of the plasma membrane called the Fluid Mosaic Model.
MCQ on Plasma Membrane Pdf:
1. Cell membrane is composed of_______
(1) Proteins and cellulose
(2) Proteins and phospholipids
(3) Proteins and carbohydrates
(4) Proteins, phospholipids and some carbohydrates
Answer: 4
(1) Proteins and cellulose
(2) Proteins and phospholipids
(3) Proteins and carbohydrates
(4) Proteins, phospholipids and some carbohydrates
Answer: 4
2. This is not the function of plasma membrane________
(1) Energy transduction
(2) Intercellular interactions
(3) Responding to external stimuli
(4) Assisting in chromosome segregation
Answer: 4
3. According to fluid mosaic model (proposed by Singer & Nicolson) plasma membrane is composed of :
(1) Cellulose, hemicellulose
(2) Phospholipid and integrated protein
(3) Phospholipid, extrinsic protein, intrinsic protein
(4) Phospholipid and hemicellulose
Answer: 3
4. Carbohydrates which present in the cell membrane take part in :–
(1) Transport of substance
(2) Cell recognition
(3) Attachment to microfilament
(4) Attachment to microtubules
Answer: 2
5. Plasma membrane is fluid structure due to presence of______
(1) Carbohydrate
(2) Lipid
(3) Glycoprotein
(4) Polysaccharide
Answer: 2
6. The chemical substance abundantly present in middle lamella is :–
(1) Cutin
(2) Chitin
(3) Lignin
(4) Pectin
Answer: 4
7. Which of the following boundary is capable of growth, which gradually diminishes as the cell matures ?
(1) Primary cell wall
(2) Secondary cell wall
(3) Tertiary cell wall
(4) Cell membrane
Answer: 1
8. The fluid nature of the membrane indicates function of______
(1) Cell growth
(2) Cell division
(3) Endocytosis
(4) All the above
Answer: 4
9. Plasma membrane is :–
(1) Selectively permeable
(2) Permeable
(3) Impermeable
(4) Semipermeable
Answer: 1
10. The Singer and Nicolson's Model of Plasma membrane differs from the Robertson's model in the-
(1) Number of lipid layers
(2) Arrangement of proteins
(3) Arrangement of lipid layers
(4) Absence of protein layers
Answer: 2
11. Ingestion of solid food by plasma membranes is called-
(1) Endosmosis
(2) Pinocytosis
(3) Cytokinesis
(4) Phagocytosis
Answer: 4
12. Ingestion of large molecules by animal cell is called -
(1) Diffusion
(2) Osmosis
(3) Exocytosis
(4) Endocytosis
Answer: 4
13. In fluid mosaic model of plasma membrane :-
(1) Upper layer is non-polar and hydrophilic
(2) Polar layer is hydrophobic
(3) Phospholipids form a bimolecular layer in middle part
(4) Proteins form a middle layer
Answer: 3
14. According to widely accepted "fluid mosaic model" cell membranes are semi–fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect –
(1) Proteins can also undergo flip–flop movements in the lipid bilayer
(2) Many proteins remain completely embedded within the lipid bilayer
(3) Proteins in cell membranes can travel within the lipid bilayer
(4) Proteins can remain confined within certain domains of the membranes
Answer: 1
15. The main lipid components of the plant cell membrane are :-
(1) Phosphodiesters
(2) Glycocalyx
(3) Peptidoglycan
(4) Phosphoglycerides
Answer: 4
16. Which one of the following is not a constituent of cell membrane ?
(1) Phospholipids
(2) Cholesterol
(3) Glycolipids
(4) Proline
Answer: 4
17. Fluid mosaic model was proposed by :-
(1) Singer and Nicolson
(2) Jacob and Monad
(3) Schleiden and Schwann
(4) Rudolf Virchow
Answer: 1
18. Cellular organelles with membranes are :
(1) Lysosomes, Golgi apparatus and mitochondria
(2) Nuclei, ribosomes and mitochondria
(3) Chromosomes, ribosomes and endoplasmic
reticulum
(4) Endoplasmic reticulum, ribosomes and nuclei
Answer: 1
19. Select the correct statement from the following regarding cell membrane :-
(1) Lipids are arranged in a bilayer with polar heads towards the inner part
(2) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
(3) Na+ and K+ ions move across cell membrane by passive transport
(4) Proteins make up 60 to 70% of the cell membrane
Answer: 2
20. Singer & Nicolson are associated with :-
(1) Cell theory
(2) Chromosomal theory of inheritance
(3) Fluid mosaic model
(4) Unit membrane theory
Answer: 3
21. Proteins, present in plasma membrane are classified as integral and peripheral on the basis of :-
(1) Density and size
(2) Ease of extraction from membrane
(3) Structure
(4) Quantity
Answer: 2
22. Which of the following cell organelles is found in both eukaryotic as well as prokaryotic cells?
(1) Mesosome
(2) Ribosome
(3) Golgi complex
(4) Mitochondria
Answer: 2
23. According to most widely accepted model of plasma membrane :-
(1) Liquid protein layer is surrounded by phospholipids
(2) Lipid are arranged in fluid layer of proteins
(3) Proteins are arranged in fluid layer of phospholipids
(4) Liquid phospholipid layer is surrounded by proteins
Answer: 3