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IIT JAM Biotechnology Previous Year Question paper Topic Cell Biology

Most Abundant Phospholipid in E. coli Plasma Membrane

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June 29, 2026
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32. The most abundant phospholipid in E. coli plasma membrane is (A) Phosphatidyl ethanolamine (B) Phosphatidyl choline (C) Phosphatidyl serine (D) Phosphatidyl inositol Most Abundant Phospholipid in E. coli Plasma […]

31. Drosophila melanogaster is a diploid organism having 8 chromosomes. The number of combinations of chromosomes which are possible in its gametes is

IIT JAM Biotechnology Previous Year Question paper Topic Cell Biology

Number of Chromosome Combinations

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June 29, 2026
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31. Drosophila melanogaster is a diploid organism having 8 chromosomes. The number of combinations of chromosomes which are possible in its gametes is Number of Chromosome Combinations in Drosophila Gametes […]

30. What is (are) the difference(s) between microtubules and microfilaments? (A) Microtubules are made up of tubulin and microfilaments are made up of intermediate filaments (B)Microtubules are important for compression resistance and microfilaments bear tension (C) Microtubules are important for the functions of cilia and flagella and the microfilaments are important for cytoplasmic streaming (D)Microtubules – muscle contraction; microfilaments – ciliary movement

IIT JAM Biotechnology Previous Year Question paper Topic Cell Biology

Microtubules vs Microfilaments

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June 29, 2026
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30. What is (are) the difference(s) between microtubules and microfilaments? (A) Microtubules are made up of tubulin and microfilaments are made up of intermediate filaments (B)Microtubules are important for compression […]

29. Choose the option that shows the correct pairing of the cellular components with their corresponding function. P. Dynein i. Movement of organelles Q. Desmosome ii. Membrane vesicle R. Endosome iii. Beating of flagella S. Kinesin iv. Attachment of cells together (A) P-iv, Q-i, R-ii, S-iii (B) P-iii, Q-iv, R-ii, S-i (C) P-iii, Q-i, R-ii, S-iv (D) P-ii, Q-i, R-iv, S-iii

IIT JAM Biotechnology Previous Year Question paper Topic Cell Biology

Dynein, Kinesin, Desmosome and Endosome Functions

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June 29, 2026
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29. Choose the option that shows the correct pairing of the cellular components with their corresponding function. P. Dynein […]

28. Signaling pathways usually comprise of several intermediate steps that are arranged in the form of a cascade. What is the primary outcome of such an arrangement? (A) Specificity of signal transduction (B) Specificity of the cellular response (C) Amplification of the cellular response (D) Fine-tuning of the cellular response

IIT JAM Biotechnology Previous Year Question paper Topic Cell Biology

Signal Transduction Cascade

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June 29, 2026
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28. Signaling pathways usually comprise of several intermediate steps that are arranged in the form of a cascade. What is the primary outcome of such an arrangement? (A) Specificity of […]

27. Apoptosis is a controlled process of cell death. The process involves (A) exposure of phosphatidyl serine on the outer surface of the cell membrane (B) decreased permeability of the outer mitochondrial membrane (C) increased lysosomal activity (D) inter-nucleosomal cleavage of genomic DNA

IIT JAM Biotechnology Previous Year Question paper Topic Cell Biology

Apoptosis Explained

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June 29, 2026
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27. Apoptosis is a controlled process of cell death. The process involves (A) exposure of phosphatidyl serine on the outer surface of the cell membrane (B) decreased permeability of the […]

26. Two mammalian cell lines with doubling times of 12 h and 36 h were cultured with radioactive thymidine for 8 h. The cells were further cultured without the radioactive thymidine for 72 h. Incorporated radioactivity was measured in equal number of cells in each culture, which revealed that (A) both the cell lines had the same amount of radioactivity (B) the fast growing cells had more radioactivity (C) the slow growing cells had more radioactivity (D) neither of the cells had any radioactivity

IIT JAM Biotechnology Previous Year Question paper Topic Cell Biology

Radioactive Thymidine Labeling and Cell Doubling Time

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June 29, 2026
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26. Two mammalian cell lines with doubling times of 12 h and 36 h were cultured with radioactive thymidine for 8 h. The cells were further cultured without the radioactive […]

25. During mitosis, disappearance of the nucleolus is a hallmark of (A) metaphase (B) prophase (C) anaphase (D) telophase

IIT JAM Biotechnology Previous Year Question paper Topic Cell Biology

During Which Phase Does the Nucleolus Disappear?

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June 29, 2026
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25. During mitosis, disappearance of the nucleolus is a hallmark of (A) metaphase (B) prophase (C) anaphase (D) telophase Disappearance of the Nucleolus During Mitosis: Prophase Introduction Mitosis is a […]

24. During eukaryotic cell division, the amount of DNA doubles (A) between prophase and anaphase of mitosis (B) between prophase I and prophase II of meiosis (C) between the G 1 and G2 phases of the cell cycle (D) during the M phase of the cell cycle

IIT JAM Biotechnology Previous Year Question paper Topic Cell Biology

When Does DNA Double in the Eukaryotic Cell Cycle?

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June 29, 2026
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24. During eukaryotic cell division, the amount of DNA doubles (A) between prophase and anaphase of mitosis (B) between prophase I and prophase II of meiosis (C) between the G […]