Cell the Unit of Life MCQs | Cell the Unit of Life Objective Type Questions and Answers

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Questions
1 Microfilaments are composed of a protein called
A Tubulin
B Actin
C Myosin
D Chitin

Answer:Actin
2 A plant cell wall is mainly composed of
A Protein
B Cellulose
C Lipid
D Starch

Answer: Cellulose
3 Glycolipids in the plasma membrane are located at
A Inner leaflet of the plasma membrane
B The outer leaflet of the plasma membrane
C Evenly distributed in the inner and outer leaflets
D It varies according to cell types

Answer: Inner leaflet of the plasma membrane
4 Lysosomes are known as “suicidal bags” because
A Parasitic activity
B Presence of food vacuole
C Hydrolytic activity
D Catalytic activity

Answer:Hydrolytic activity
5 The properties of integral membrane proteins can be studied by
A Atomic force microscopy
B Cryo-sectioning and electron microscopy
C Freeze-fracture technique and electron microscopy
D All of the above

Answer: Freeze-fracture technique and electron microscopy
6 The fluidity of the plasma membrane increases with
A Increase in unsaturated fatty acids in the membrane
B Increase in saturated fatty acids in the membrane
C Increase in glycolipid content in the membrane
D Increase in phospholipid content in the membrane

Answer: Increase in unsaturated fatty acids in the membrane
7 Which among the following defines GPI anchored proteins?
A Integral proteins of the plasma membrane
B Peripheral proteins of the plasma membrane
C Proteins that bind to ion-gated channels in the plasma membrane
D Proteins which randomly bind to lipids of the plasma membrane

Answer: Peripheral proteins of the plasma membrane
8 The resting potential membrane is determined by
A Potassium-ion gradient
B Sodium-ion gradient
C Bicarbonate-ion gradient
D None

Answer:Potassium-ion gradient
9 The oxygen and carbon dioxide crosses the plasma membrane by the process of
A Active diffusion
B Facilitated diffusion
C Passive diffusion
D Random diffusion

Answer:Passive diffusion
10 A cell without a cell wall is termed as
A Tonoplast
B Protoplast
C Symplast
D Apoplast

Answer: Protoplast
11 Which is not an example of transmembrane transport between different subcellular compartments?
A Transport from the stroma into thylakoid space
B Transport from the cytoplasm into the lumen of the endoplasmic reticulum
C Transport from the endoplasmic reticulum into the Golgi complex
D Transport from mitochondrial intermembrane space into the mitochondrial matrix

Answer: Transport from the endoplasmic reticulum into the Golgi complex
12 Which is correct regarding the peptides in the Ramachandran Plot?
A The sequence of the peptide can be deduced
B It is not possible to conclude whether a peptide adopts entirely helix or entirely beta-sheet conformation
C Peptides that are unstructured will have all the backbone dihedral angles in the disallowed regions
D The occurrence of a beta-turn conformation in a peptide can be deduced

Answer: The occurrence of a beta-turn conformation in a peptide can be deduced
13 The function of the centrosome is
A Formation of spindle fibres
B Osmoregulation
C Secretion
D Protein synthesis

Answer:Formation of spindle fibres
14 Which cell organelle is involved in apoptosis?
A Lysosome
B ER
C Golgi
D Mitochondria

Answer: Mitochondria
15 Phosphatidylserine residues in the plasma membrane are located at
A Inner leaflet of the plasma membrane
B The outer leaflet of the plasma membrane
C Evenly distributed in the inner and outer leaflet
D None

Answer: Inner leaflet of the plasma membrane
16 Distribution of intrinsic proteins in the plasma membrane is
A Random
B Symmetrical
C Asymmetrical
D None

Answer:Asymmetrical
17 Select a foodborne toxin
A Botulinum toxin
B Tetanus Toxin
C Diphtheria toxin
D Cholera Toxin

Answer:Botulinum toxin
18 This cell organelle is responsible for extracting energy from carbohydrates to form ATP
A Lysosome
B Ribosome
C Chloroplast
D Mitochondrion

Answer:Mitochondrion
19 Pick the incorrect statement
A Mycoplasma is a wall-less microorganism
B Pili and fimbriae are mainly involved in motility of bacterial cells
C The bacterial cell wall is made up of peptidoglycan
D Cyanobacteria lack flagellated cells

Answer: Mycoplasma is a wall-less microorganism
20 As per the Fluid Mosaic model, plasma membrane is composed of
A phospholipids and integral proteins
B phospholipids, extrinsic proteins, and intrinsic proteins
C phospholipids and hemicellulose
D phospholipids and oligosaccharides

Answer: phospholipids, extrinsic proteins, and intrinsic proteins

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