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Free download in PDF Cell the Unit of Life Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries./p>
(1)
Microfilaments are composed of a protein called
[A]
Tubulin
[B]
Actin
[C]
Myosin
[D]
Chitin
(2)
A plant cell wall is mainly composed of
[A]
Protein
[B]
Cellulose
[C]
Lipid
[D]
Starch
(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
(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
(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
(17)
Select a foodborne toxin
[A]
Botulinum toxin
[B]
Tetanus Toxin
[C]
Diphtheria toxin
[D]
Cholera Toxin
(18)
This cell organelle is responsible for extracting energy from carbohydrates to form ATP
[A]
Lysosome
[B]
Ribosome
[C]
Chloroplast
[D]
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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