CSIR NET Life Science – Cell Biology Chapterwise Practice Questions Free 2022

Practice Chapter-wise Questions of Cell Biology for CSIR NET Life Science for free here. Revise the complete Chapter and then Practice Chapter-wise Questions Here, Only on ExamFlame and take your preparation to the another level. By Practicing these Question , you will feel more confident about this chapter.

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These Questions are strictly follow your syllabus of Life Science for CSIR NET and prepared under experts of this field. And the Question’s level matches the CSIR NET Exam level, so that this practice set of Questions will give you same exact feel of your exam. Also Check CSIR NET Life Science Study Material PDF Download Free 2022

Following Instructions to attempt the CSIR NET Life Science – Cell Biology Chapterwise Practice Questions

  • In this practice post there are total 100 Multiple Choice Questions (MCQs) are given from the Chapter Cell Biology for CSIR NET Life Science.
  • Take a sheet of Paper and write down numbers from 1 to 100 .
  • Also Take a separate copy or page for Rough calculations .
  • Solve the Questions in a given time interval which you can choose yourself as per your preparation level .
  • Write your correct answer you think in answer sheet made by you by solving the Question .
  • Match your answers with the correct Answer key attached below at the end of this post .
  • Be honest with yourself and don’t forget to comment your marks below in the comment section.

CSIR NET Life Science – Cell Biology Chapterwise Practice Questions Free 2022 [Practice Now]

  1. In a cell if acidity of Lysome is lost, then loss of:
    (a) Phagocytosis of invading bacteria
    (b) Elevated phosphatase level
    (c) Glycogen degradation
    (d) No major effect
  2. Bacterial genomes is prevented by its own endonucleases by-
    (a) Methylation at restriction sites
    (b) Immune mechanism
    (c) Nuclease resistant genome
    (d) Are not much effective on bacterial genome
  3. The function of macrophages is to-
    (a) Enzyme Secretion
    (b) Engulf Cell organelles
    (c) Engulf Foreign Material
    (d) Kills Invading Bacteria
  4. The difference which distinguish prokaryotic cell from eukaryotic is-
    (a) ER (b) Mesosome
    (c) Nuclear Membrane (d) Plasma membrane
  5. Extra nuclear genetic material is found-
    (a) Ribosome (b) ER
    (c) Chloroplast (d) Centriole
  6. The acrosome of the sperm is formed from the
    (a) mitochondria (b) centrosome
    (c) lysomome (d) golgi bodies
  7. Holiday junction is observed during:
    (a) Mitosis (b) Interphase
    (c) Recombination (d) DNA Repair
  8. A caretenoid less mutant plant was grown under normal sunlight then-
    (a) Increased photosynthesis rate
    (b) Increased chlorophyll synthesis
    (c) Reduced photorespiration
    (d) Increased chlorophyll oxidation and necrosis
  9. A C3 mustard plant was grown at 300 ppm of CO2 in 14 h light and 10 h dark cycles,
    it was transferred to 1000 ppm CO2. This will lead to (other environmental parameters remaining identical)-
    (a) Increased photosynthesis (b) Decreased Photosynthesis
    (c) Increase in Respiration (d) No Change
  10. Presence of AIDS virus cannot be detected by-
    (a) ELISA (b) Western blotting
    (c) Northern Blot (d) Assay of full-length ds DNA
  11. Which part of translational modification of proteins does not occur in lumen of ER-
    (a) Glycosylation
    (b) Ubiquitnation
    (c) Conformation folding & formation of quaternary structure
    (d) Formation of Disulphide bonds
  12. Freshly broken chromosome ends are sticky & tend to fuse, however ends of intact
    chromosomes are stable. Their stability is due to presence of-
    (a) Centromeres
    (b) Telomeres
    (c) Special membrane around chromosomes
    (d) Kinetochores
  13. Plant cell wall is generally made up of-
    (a) Cellulose and pectin (b) Cellulose
    (c) Chitin (d) Murin
  14. Which one of the following is correct for structure of cell wall of fungi and Bacteria?
    (a) Both have glycopeptide
    (b) Both are made up of N-acetylglucasamine
    (c) Both are made up of murin
    (d) Both are made up of chitin
  15. Nucleus is absent in-
    (a) Sieve tube (b) cambium
    (c) Phloem parenchyma (d) None of these
  16. Among the following which is true cell according cell theory-
    (a) Virus (b) Monerans
    (c) Protestans (d) Bacteria
  17. The characteristic property of metabolically active cell is-
    (a) Low nucleo-cytoplasmic ratio
    (b) High nucleo-cytoplasmic ratio
    (c) High volume to surface area ratio
    (d) Small nucleus
  18. Plasma membrane the functional as well as structural role is played by-
    (a) Proteins (b) Lipids
    (c) Cholesterol (d) Oligosaccharides
  19. Lipid nature of plasma membrane can be destroyed by-
    (a) Hexane (b) Benzene
    (c) Chloroform (d) NaOH
  20. The plasma membrane of intestine is highly folded into microvilli. The main function
    of Microvilli is-
    (a) To Secrete digestive enzymes (b) To help in blood circulation
    (c) To increase its absorptive surface (d) For ageing of worn out cells
  21. The structure formed where two adjacent membrane are thickened with disc shaped
    adhesive material in between and tonofibrils radiating out from adhesive region is-
    (a) Gap junction (b) Tight junctions
    (c) Desmosomes (d) Plasmodesmata
  22. The outer part of cytoplasm is usually termed as-
    (a) Plasmasol (b) Plasmagel
    (c) Nucleoplasm (d) Protoplasm
  23. Endoplasmic reticulum originates from-
    (a) Nuclues (b) Nucleulous
    (c) Golgi Complex (d) Plasma membrane.
  24. The endoplasmic reticulum which constitute 50 % of cell is absent in-
    (a) Ova (b) Embryonic cells
    (c) Mature erythrocytes (d) All of the above
  25. Ribosome are attached to endoplasmic reticulum through glycoprotein known as
    Ribophorin I & II. The Subunit of ribosome which get attached to ER is-
    (a) P site (b) A site
    (c) Large subunit (d) Small subunit
  26. How you can separate Gram + ve bacteria from Gram –ve bacteria-
    (a) Presence of Techoic Acid (b) Absence of periplasmic Space
    (c) Exotoxin Produced (d) All of the above
  27. Lysosomes are polymorphous organelles enclosed by a single membrane. They contain
    vast array of hydrolytic enzymes which can digest any foreign material except-
    (a) Cellulose (b) Starch
    (c) Glycogen (d) Lipids
  28. Spectrin of erythrocytes and cytochrome c of mitochondria, which can be easily
    dissociated by high ionic strength and metal ion chelating agent are example of-
    (a) Extrinsic Protein (b) Intrinsic protein
    (c) Tunnel Protein (d) Cytoplasmic Protein
  29. Fats, Sterol and detoxification are found abundant in-
    (a) Adipose cells (b) Muscle cells
    (c) Liver cells (d) All of above
  30. RER is found abundantly in goblet cells, pancreatic cells and liver cells is mainly
    engaged in-
    (a) Glycosylation of protein
    (b) Folding and Secondary Structure formation
    (c) Production of Secretory & cytosolic protein
    (d) Production and Excretion of protein
  31. Microsomes are not found in cell in natural condition. They are-
    (a) Present only in certain bacteria
    (b) Broken pieces of ER during centrifugation
    (c) Broken pieces of golgi during centrifugation
    (d) Present in certain fungi
  32. Among the following which is not present in smaller subunit of ribosome-
    (a) Peptidyl transferase (b) Binding site for t RNA
    (c) A Site (d) P site
  33. Polyribosome are seen in-
    (a) Bacteria (b) Fungi
    (c) Angiosperms (d) Mammals
  34. r-RNA originates from-
    (a) Nucleus (b) Nucleolous
    (c) Cytoplasm (d) ER
  35. Which organelle is presenting zone of exclusion and have definite polarity-
    (a) Golgi (b) ER
    (c) Nucleus (d) Ribosome
  36. Lysosomes are abundant in-
    (a) WBC and osteoblasts (b) RBC and Spleen
    (c) Liver and Spleen (d) WBC and Spleen
  37. Lysosome membrane is strengthened by cortisol, cortisone, antihistamine, heparin,
    chloroquinone and cholesterol but becomes fragile-
    (a) Low bile salts and energy radiations
    (b) In absence of oxygen
    (c) Low Vitamin A & E
    (d) Low Progestrone and estrogen
  38. Fruit rotting can be checked by slowing down the action of enzyme polygalactouronose
    of the organelle-
    (a) Golgi (b) Lysosomes
    (c) Glyoxysome (d) Peroxisome
  39. In prokaryotes where the mitochondria is absent, the site of oxidative phosphorylation
    and electron transport chain including dehydrogenases is-
    (a) Mesosomes (b) Endosomes
    (c) Plasma membrane (d) Microsomes
  40. Water soluble phycobillin pigment occur in-
    (a) BGA and Green algae (b) BGA and Red algae
    (c) Green algae and Red algae (d) Green algae and Brown algae
  41. Photosynthetic pigments are located in membrane on specific areas called as-
    (a) Oxysomes (b) Quantosomes
    (c) Photosystem (d) Antenna molecules
  42. Microtubules are 25 nm thick, 15nm core formed of 13 helically arranged
    protofilaments made up of-
    (a) a tubulin (b) b-tubulin
    (c) Myosin (d) both a & b
  43. Intermediate filaments are made up of-
    (a) Non-contractile proteins (b) b-tubulin
    (c) Myosin (d) Actin
  44. In hexose m onophosphate shunt, the CO2
    molecules evolved is-
    (a) Same as in glycolysis (b) Less then glycolysis
    (c) More then glycolysis (d) Much lesser then glycolysis
  45. The electron donor during nitrogen fixation is-
    (a) Water (b) Ferrocynide
    (c) Ferodoxin (d) CO2
  46. The chromatin is made up of repitative units known-
    (a) Chromosomes (b) Chromonemata
    (c) Nucleosomes (d) Nucleotides
  47. Exocytosis and endocytosis is absent in-
    (a) Amoeba (b) Euglena
    (c) Mycoplasma (d) Algae
  48. Cytochrome oxidase and cytochrome c deficiency in mitochondria causes-
    (a) Menke’s disease
    (b) Kearns-says syndrome and Menke’s disease
    (c) Kearns-says syndrome
    (d) Leber’s optic neuropathy
  49. Photophosophorylation occurs in-
    (a) Plastids (b) Mitochondria
    (c) Cytoplasm (d) Cell membrane
  50. Which of the following is correct with regard to aneuploidy?
    (a) inversion
    (b) 2n + 1
    (c) All aneuploid individuals die before birth.
    (d) 4n
  51. If a fragment of a chromosome breaks off and then reattaches to the original
    chromosome but in the reverse direction, the resulting chromosomal abnormality is
    (a) a deletion. (b) an inversion.
    (c) a translocation. (d) a nondisjunction.
  52. Why are individuals with an extra chromosome 21, which causes Down syndrome,
    more numerous than individuals with an extra chromosome 3 or chromosome 16?
    (a) There are probably more genes on chromosome 21 than on the others.
    (b) Chromosome 21 is a sex chromosome and 3 and 16 are not.
    (c) Down syndrome is not more common, just more serious.
    (d) Extra copies of the other chromosomes are probably fatal.
  53. Humans have 23 pairs of chromosomes, while our closest relatives, chimpanzees,
    have 24. Chromosome studies indicate that at some point early in human evolution,
    two chromosomes simultaneously broke into a large portion and a small portion. The
    large parts combined to form a large chromosome, and the small parts combined to
    form a much smaller chromosome (which was subsequently lost). This important
    chromosomal change could best be described as
    (a) nondisjunction followed by deletion.
    (b) translocation followed by deletion.
    (c) duplication followed by deletion.
    (d) translocation followed by inversion.
  54. Each cell in an individual with Down syndrome contains __ chromosomes.
    (a) 3 (b) 22
    (c) 24 (d) 47
  55. Disorders involving unusual numbers of sex chromosomes show that maleness is
    caused by the
    (a) presence of an X chromosome.
    (b) presence of a Y chromosome.
    (c) absence of an X chromosome.
    (d) absence of a Y chromosome.
  56. A particular allele can have different effects if it was inherited from a male rather
    than a female. This phenomenon is known as
    (a) extranuclear inheritance. (b) aneuploidy.
    (c) sex-linkage. (d) genome imprinting.
  57. Human mitochondria
    (a) are inherited as an X-linked trait.
    (b) are all inherited from the father.
    (c) have linear DNA.
    (d) are all inherited from the mother.
  58. Both chloroplasts and mitochondria
    (a) are found within the nucleus.
    (b) have linear DNA.
    (c) carry extranuclear genes.
    (d) are inherited from both parents.
  59. Damaged DNA is excised by
    (a) restriction enzymes. (b) helicase.
    (c) primase. (d) DNA polymerase.
  60. Unlike prokaryotic DNA replication, eukaryotic DNA replication
    (a) is completed by DNA polymerase.
    (b) cannot be completed by DNA polymerase.
    (c) is semiconservative.
    (d) has a multiple origin.
  61. Which of the following is an example of a hydrophobic material?
    (a) Paper (b) Sugar
    (c) Pasta (d) Wax
  62. We can be sure that a mole of table sugar and a mole of vitamin C are equal in their
    (a) weight in daltons
    (b) number of molecules
    (c) volume
    (d) number of atoms
  63. Among the following which is longest cell-
    (a) Hemp (b) Ramie
    (c) Jute (d) Nerve fibre
  64. The middle lamella of plant cells is made up of calcium magnesium pectate. Pectic
    Acid is polymer of-
    (a) a-1,4 D-Glucose (b) b-1,6-D Glucose
    (c) a-1,4 D-Galactouronic acid (d) b-1,4 D-Galactouronic acid
  65. Acid precipitation has lowered the pH of a particular lake to 4.0. What is the hydrogen
    ion concentration of the lake
    (a) 10–4 M (b) 4.0 M
    (c) 10–10 M (d) 104 M
  66. The percentage amount of Integral protein of plasma membrane is-
    (a) 40 % (b) 50 %
    (c) 60 % (d) 70 %
  67. Oligosaccharide are usely attached to extrinsic phase of plasma membrane by-
    (a) Proteins (b) Lipids
    (c) Both a & b (d) Not specific
  68. Maximum number of enzymes in a eukaryotic cell is present inside
    (a) Cytosol (b) Mitocondria
    (c) Lysosome (d) ER
  69. Which of the following term includes all others in the list?
    (a) Monosaccharide (b) Carbohydrate
    (c) Disaccharide (d) Starch
  70. The structural level of a protein least affected by a disruption in hydrogen bond is the
    (a) secondary level (b) tertiary level
    (c) primary level (d) quaternary level
  71. To convert a nucleoside to a nucleotide, it would be necessary to:
    (a) remove the pentose from the nucleoside (b) add phosphate to the nucleoside
    (c) replace purine with pyrimidine (d) replace ribose with deoxyribose
  72. Choose the pair of terms that correctly completes this sentence:
    Nucleotides are to ___ as ___ are to proteins.
    (a) amino acids; polypeptides (b) genes; enzymes
    (c) nucleic acids; amino acids (d) polymers, polypeptides
  73. Post translation modification of secretary proteins occurs in:
    (a) RER (b) SER
    (c) Mitocondria (d) nucleus
  74. Most cells cannot harness heat in order to perform work because
    (a) heat is not a form of energy
    (b) Cells do not have much heat; they are relatively cool
    (c) heat denatures enzymes
    (d) temperature is usually uniform throughout a cell
  75. Choose the pair of terms that correctly completes this sentence; Catabolism is to
    anabolism as ––––––––– is to ––––––––––.
    (a) exergonic ; spontaneous (b) free energy ; entropy
    (c) exergonic ; endergonic (d) work ; energy
  76. According to the first law of thermodynamics
    (a) matter can be neither created nor destroyed.
    (b) all processes increase the order of the universe.
    (c) systems rich in energy are intrinsically stable
    (d) energy is conserved in all processes
  77. How you can separate Gram + ve bacteria from Gram –ve bacteria-
    (a) Presence of Techoic Acid (b) Absence of periplasmic Space
    (c) Exotoxin Produced (d) All of the above
  78. The main Phagocytotic cell in immune response is-
    (a) Neutrophils (b) Basophils
    (c) Monocytes (d) Lymphocytes
  79. The phagocytes are attracted toward microorganisms by-
    (a) Chemotaxis (b) Rheotaxis
    (c) Diapedesis (d) Thogmotaxis
  80. The cell wall of microorganisms is coated with certain plasma protein promoting the
    attachment of microbe to phagocytes, only then they can be phagocytosised. The coat
    protein are called as-
    (a) Globins (b) Opsonins
    (c) Ovulbumins (d) Phagosonins
  81. After the damage of body tissues, blood vessel is dilated where damage has occurred,
    due to which permeability of blood vessel also increases. Vasodilation is caused by-
    (a) Histamine (b) Kinin
    (c) Prostaglandin (d) All of above
  82. The process of sneezing of phagocytes between the endothelial cells of blood vessels
    and reaching to damaged area is known as-
    (a) Margination (b) Metastasis
    (c) Diapedesis (d) Angiobiosis
  83. In humans interferon is produced by leucocytes, fibroblasts in connective tissue and lymphocytes and are termed as a-IFN, b-IFN and g-INF resp. The interferons are-
    (a) Antibacterial proteins (b) Antiviral Protein
    (c) Anti cancerous protein (d) Anticancer protein
  84. During embryonic stage of human B-lymphocytes are produced in-
    (a) Bone marrow (b) Spleen
    (c) Liver (d) Bursa
  85. Haptens are –
    (a) Immunogenic antigen
    (b) Non Immunogenic Antigen
    (c) High molecular weight non immunogenic antigen
    (d) Low molecular weight immunogenic antigen
  86. Lysosomes are polymorphous organelles containing vast array of hydrolytic enzymes which can digest any foreign material only at pH-
    (a) 5 (b) 6
    (c) 9 (d) 7
  87. Number of antigen functional binding site in human Immunoglobin-M are-
    (a) 2 (b) 5
    (c) 10 (d) 20
  88. Number of amino acids in light and heavy chain of typical immunoglobin are
    (a) 110, 220 (b) 220, 440
    (c) 440, 880 (d) 880, 1760
  89. Among the following which is not essential property of immunoglobin-
    (a) Memory (b) Specificity
    (c) Diversity (d) Reactivity
  90. Spectrin of erythrocytes and cytochrome c of mitochondria, which can be easily dissociated by high ionic strength and metal ion chelating agent are example of-
    (a) Extrinsic Protein (b) Intrinsic protein
    (c) Tunnel Protein (d) Cytoplasmic Protein
  91. Polyclonal antibodies are-
    (a) Clones against single antigen by many B-cells
    (b) Clones against single antigen by single B-cells
    (c) Clones against many antigen by single B-cells
    (d) Clones against many antigen by many B-cells
  92. Lymphokines that recruit the macrophages for Phagocytosis are secreted by-
    (a) T-cells (b) B-cells
    (c) Complement system (d) MHC
  93. Liposomes are-
    (a) Lipid filled bags (b) Artificial membranes
    (c) Liver Fat bodies (d) Eukaryotic organelle
  94. Which among the following act as bridge between cell mediated and humoral immunity-
    (a) T-cytoxic cells (b) T-suppressor cells
    (c) B-cells (d) T-helper cells
  95. In humans cell recognition molecules are-
    (a) HLA (b) B-cells
    (c) T-Cells (d) Immunoglobins
  96. Cancers cell are monoclonal, are characterized by uncontrolled growth, invasion of other tissues and dissemination to other tissues. The phenomenon of invasion to other tissues is termed as-
    (a) Angiobiogenesis (b) Metastasis
    (c) Diapedesis (d) Transformation
  97. A major protease secreted by cancer cells acts on plasminogen and converts it into plasmin. Plasmin is proteolytic enzyme that dissolves blood clots and also removes exposed protein groups at cell surface. If the plasminogen is removed form the medium, then-
    (a) The morphology of cancer cells returns to normal.
    (b) The cancer cell will show more exponential growth.
    (c) Cancer cell will die
    (d) No change will be seen
  98. One of the major higher molecular weight glycoprotein component which can be easily isolated from normal cultured fibroblast by mild treatment of urea, also occur at “foot prints” that moving culture cells leaves, is totally absent in cancerous cell is-
    (a) Fibronectin (b) Albumin
    (c) Ferritin (d) Transferin
  99. The sex determination in drossophila is based on-
    (a) X-Chromosome (b) Y chromosome
    (c) Autosome (d) Both a & c
  100. Environmental control of sex determination is seen in-
    (a) Melandrium (b) Drosophila
    (c) Bonelia (d) Apes indica

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CSIR NET Life Science – Cell Biology Chapterwise Practice Questions Free : ANSWER KEY

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