Cell the Unit of Life MCQs | Cell the Unit of Life Multiple Choice Questions (MCQs) and Answers

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Questions
1 The chromosome in which centromere is located close to one end are
A Sub-metacentric
B Metacentric
C Acrocentric
D Telocentric

Answer:Acrocentric
2 A somatic cell that has just completed the S-phase of its cell cycle, as compared to gamete of the same species, has
A Four times the number of chromosomes and twice the amount of DNA
B Twice the number of chromosomes and twice the amount of DNA
C Same number of chromosomes and twice the amount of DNA
D Twice the number of chromosomes and 4 times the amount of DNA

Answer:Twice the number of chromosomes and 4 times the amount of DNA
3 Which structure performs the function of mitochondria in bacteria
A Nucleoid
B Ribosomes
C Cell wall
D Mesosome

Answer: Mesosome
4 Golgi complex plays a major role
A In digesting proteins and carbohydrates
B As energy transferring organelle
C In post translational modification of proteins and glycosidation of lipids
D In trapping the light and transforming it into chemical energy

Answer: In post translational modification of proteins and glycosidation of lipids
5 Which one of the following does not differ in E. coli and chlamydomonas
A Cell wall
B Cell membrane
C Ribosomes
D Chromosomal organization

Answer: Cell membrane
6 Select the correct statement from the following regarding cell membrane
A Lipids are arranged in a bilayer with polar heads towards the inner part
B Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
C Na+ and K+ move across the cell membrane by passive transport
D Proteins make up 60-70% of the cell membrane

Answer:Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
7 What is true about ribosomes
A These are found only in eukaryotic cells
B These are self-splicing introns of some RNAs
C The prokaryotic ribosomes are 80S, where “S” stands for sedimentation coefficient
D These are composed of ribonucleic acid and proteins

Answer: These are composed of ribonucleic acid and proteins
8 Ribosomal RNA is actively synthesized in
A Nucleoplasm
B Ribosomes
C Lysosomes
D Nucleolus

Answer:Nucleolus
9 Important site for the formation of glycoproteins and glycolipids is
A Ribosomes
B Golgi apparatus
C Plastids
D Vacuoles

Answer: Golgi apparatus
10 Peptide synthesis inside a cell takes place in
A Ribosomes
B Chloroplasts
C Mitochondria
D Chromoplast

Answer: Ribosomes
11 In eubacteria, a cellular component that resembles eukaryotic cell is
A Cell wall
B Plasma membrane
C Nucleus
D Ribosomes

Answer: Plasma membrane
12 In mitochondria protons accumulate in the
A Inter membrane space
B Matrix
C Outer membrane
D Inner membrane

Answer: Inter membrane space
13 Which one of the following is not considered as part of endomembrane system
A Vacuole
B Lysosome
C Golgi complex
D Peroxisome

Answer: Peroxisome
14 The main arena of various types activities of a cell is
A Nucleus
B Plasma membrane
C Mitochondria
D Cytoplasm

Answer: Cytoplasm
15 The plasma membrane consists of mainly
A Proteins embedded in the carbohydrate bilayer
B Phospholipids embedded in protein bilayer
C Proteins embedded in phospholipid layer
D Proteins embedded in a polymer of glucose molecules

Answer:Proteins embedded in phospholipid layer
16 Which one of the following statements about the particular entity is true?
A Centromere if found in animal cells, which produces ester during cell divisions
B The gene for producing insulin is present in every body cell
C Nucleosome is formed of nucleotides
D DNA consists of a core of 8 Histones

Answer: The gene for producing insulin is present in every body cell
17 Plasmodesmata are
A Locomotory structures
B Membranes connecting the nucleus with plasma lemma
C Connections between adjacent cells
D Lignified cemented layers between the cells

Answer: Connections between adjacent cells
18 Polysome is formed by
A Ribosomes attached to each other in a linear arrangement
B Several ribosomes attached to a single mRNA strand
C Many ribosomes attached to a strand of ER
D A ribosome with several subunits

Answer: Several ribosomes attached to a single mRNA strand
19 Keeping in view the ‘fluid mosaic model’ for the structure of cell membrane, which one of the following statements is correct w.r.t. the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?
A Neither lipids nor proteins can flip-flop
B Both lipids and proteins can flip flop
C While lipids can rarely flip flop, proteins cannot
D While proteins can rarely flip flop, lipids cannot

Answer: While lipids can rarely flip flop, proteins cannot
20 Which one of the following is not a constituent of cell membrane
A Phospholipids
B Cholesterol
C Glycolipids
D Proline

Answer: Proline

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