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Cell: The Unit of Life Class 11 MCQs Questions with Answers
Question 1.
In eubacteria, a cellular component which resembles a eukaryotic cell is
(a) Ribosomes
(b) Plasma membrane
(c) Nucleus
(d) Cell wall
Answer
Answer: (b) Plasma membrane
Question 2.
A cell membrane shows fluid behavior due to
(a) Mosaic of lipid and proteins
(b) Presence of fluid protein
(c) Mosaic of fat and glucose
(d) Sandwich of protein between lipids layer
Answer
Answer: (a) Mosaic of lipid and proteins
Question 3.
Plastids which store fats and oils are called:-
(a) Aleuroplast
(b) Amyloplast
(c) Etioplast
(d) Elaioplast
Answer
Answer: (d) Elaioplast
Question 4.
Which one is not a difference between Prokaryotic and Eukaryotic cell?
(a) Presence of membrane bounded organelles
(b) Number of chromosomes
(c) Presence of nuclear membrane
(d) Presence of cell wall
Answer
Answer: (d) Presence of cell wall
Question 5.
Which of the following statements with reference to cytoskeleton is not correct?
(a) Cytoskeleton helps in motility.
(b) Cytoskeleton maintains the shape of the cell.
(c) Cytoskeleton helpful in production of ATP.
(d) Cytoskeleton helpful in mechanical support.
Answer
Answer: (c) Cytoskeleton helpful in production of ATP.
Question 6.
The nucleus was first described by
(a) Schwann
(b) Flemming
(c) Palade
(d) Robert brown
Answer
Answer: (d) Robert brown
Question 7.
Cytoskeleton is made of
(a) Cellulose microfibrils
(b) Protienaceous filaments
(c) Callose deposit
(d) Calcium carbonate granules
Answer
Answer: (b) Protienaceous filaments
Question 8.
Mitochondria and chloroplast are considered to be endosymbionts of cell because they:
(a) Possess their own nucleic acid
(b) Have capacity of ATP synthesis
(c) Do not reproduce
(d) All the above
Answer
Answer: (a) Possess their own nucleic acid
Question 9.
Sphaerosome are involved in:
(a) Synthesis and storage of lipid
(b) Synthesis of protein
(c) β–oxidation of fatty acids
(d) Synthesis and storage of carbohydrate
Answer
Answer: (a) Synthesis and storage of lipid
Question 10.
Longest cell in human body are
(a) Muscle cell
(b) Nerve cells
(c) Blood cells
(d) Mast cells
Answer
Answer: (b) Nerve cells
Question 11.
The eukaryotic ribosomes are of
(a) 50S
(b) 30S
(c) 80S
(d) 70S
Answer
Answer: (c) 80S
Question 12.
Tubulin occurs in
(a) Plasma membrane
(b) Golgi bodies
(c) Cilia and flagella
(d) All the above
Answer
Answer: (c) Cilia and flagella
Question 13.
The photograph or diagram of metaphasicchromosome arranged in homologous pair according to their length and thickness, position of centromere is called
(a) Karyogram
(b) Chromogram
(c) Idiogram
(d) None of these
Answer
Answer: (c) Idiogram
Question 14.
The structure of plasma membrane fluid mosaic model is proposed by
(a) Gram
(b) Singer and Nicolson
(c) Schwann and Schleiden
(d) Robert brown
Answer
Answer: (b) Singer and Nicolson
Question 15.
Which ion holds the ribosomal subunits together
(a) Ca+2
(b) Mn+2
(c) Mg+2
(d) Na+
Answer
Answer: (c) Mg+2
Question 16.
The plasma membrane consists mainly of
(a) Proteins embedded in a polymer of glucose molecules
(b) Proteins embedded in a phospholipids layer
(c) Proteins embedded in a glucose molecules
(d) Proteins embedded in a carbohydrate bilayer
Answer
Answer: (b) Proteins embedded in a phospholipids layer
Question 17.
SER differ from RER in
(a) Presence of glucose molecules
(b) Absence of glucose molecule
(c) Absence of granules on surface
(d) Absence of ribosome on surface
Answer
Answer: (d) Absence of ribosome on surface
Question 18.
Each centriole is surrounded by dense amorphous protoplasmic masses called
(a) Cytoplasmic particles
(b) Meta-molecule
(c) Cell granules
(d) Massules
Answer
Answer: (d) Massules
Question 19.
Which one of the following is not an inclusion body found in prokaryotes?
(a) Cyanophycean granule
(b) Glycogen granule
(c) Polysome
(d) Phosphate granule
Answer
Answer: (c) Polysome
Question 20.
Which of the following is present in both prokaryotic and eukaryotic cells?
(a) Mitochondria
(b) Endoplasmic reticulum
(c) Nucleus
(d) Ribosomes
Answer
Answer: (d) Ribosomes
Question 21.
In which of the following cell centriole is absent:
(a) Epithelial cell
(b) Gland cell
(c) Liver cells
(d) Nerve cell
Answer
Answer: (d) Nerve cell
Question 22.
Which of the following statements is true for a secretory cell?
(a) Golgi apparatus is absent
(b) Only Smooth Endoplasmic Reticulum (SER) is present
(c) Rough Endoplasmic Reticulum (RER) is easily observed in the cell
(d) Secretory granules are formed in nucleus
Answer
Answer: (c) Rough Endoplasmic Reticulum (RER) is easily observed in the cell
Question 23.
The fluid filled vacuoles or vesicles which are separated from cytoplasm by a selectively permeable membrane called
(a) Symplast
(b) Aquaplast
(c) Hydroplast
(d) Tonoplast
Answer
Answer: (d) Tonoplast
Question 24.
Two cell organelles in plant cell having own genetic material is called
(a) Mitochondria and Golgi bodies
(b) Chloroplast and Golgi bodies
(c) Mitochondria and Chloroplast
(d) Golgi bodies and lysosomes
Answer
Answer: (c) Mitochondria and Chloroplast
Question 25.
Which is not true about sphaerosomes
(a) Involved in photorespiration
(b) Arise from E.R.
(c) Related to fat metbolism
(d) Single membane bound
Answer
Answer: (a) Involved in photorespiration
Question 26.
Cellular organelles with membranes are:
(a) Chromosomes, ribosomes and endoplasmic reticulum
(b) The endoplasmic reticulum, ribosomes, and nuclei
(c) Lysosomes, Golgi apparatus and mitochondria
(d) Nuclei, ribosomes and mitochondria
Answer
Answer: (c) Lysosomes, Golgi apparatus and mitochondria
Question 27.
How much percent of vacuoles occupy the volume of the cell in plant cells?
(a) 80%
(b) 90%
(c) 50%
(d) 70%
Answer
Answer: (b) 90%
Question 28.
Cell wall is absent in:
(a) Funaria
(b) Mycoplasma
(c) Nostoc
(d) Aspergillus
Answer
Answer: (b) Mycoplasma
Question 29.
Largest organelles in cell is
(a) Golgi bodies
(b) Lysosomes
(c) Centrioles in animals and plastids in plant cell
(d) Mitochondria in animal cell and chloroplast in plant cell
Answer
Answer: (d) Mitochondria in animal cell and chloroplast in plant cell
Question 30.
Factory of ribosome in a cell is:
(a) Endoplasmic reticulum
(b) Nucleolus
(c) Mitochondria
(d) Golgi body
Answer
Answer: (b) Nucleolus
Question 31.
The stacks of closely packed thylakoids is called
(a) Lumen
(b) Matrix
(c) Stroma
(d) Granum
Answer
Answer: (d) Granum
Question 32.
Peroxysomes contain:
(a) Hydrolytic enzyme
(b) Transferase
(c) Isomerase
(d) Oxidising enzyme (Oxidase)
Answer
Answer: (d) Oxidising enzyme (Oxidase)
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