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Time : Three Hours] [Maximum Marks : 80
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B.Sc. (Part—I) Semcester—IT Examination
2S- -Z00LOGY
(Cell and Developmental Biology)
Note :— (1) ALL questions arc compulsory.
(2) Question No. 1 carries 8 marks and remaining six questions carry 12 marks each.
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(3) [Mlustrate your answers with suitable diagrams wherever necessary.
1. (A) Fill in the blanks :
(i) The prokaryotic ribosomes are __________
(i) Lysosomes are also called as __________ bags.
(i11) Division of cytoplasm is known as __________
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(iv) Lampbrush chromosomes occurs in __________
(B) Choose correct alternative from the following :
(v) Ingestion of liquid particles by a cell is called as :
(a) Phagocytosis (b) Pinocytosis
(c) Luysis (d) None of the above
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(vi) Who discovered ribosome in animal cells ?
(a) Watson (b) Tatum
(c) Cowdy (d) Palade
(vii) The tip of a chromosome is called :
(a) Mectamere (b) Chromomere
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(¢) Micromere (d) Telomere
(viii) In adult which cell is used as stem cells ?
(a) Bone marrow cells (b) Embrvonic cell
(¢) Muscle cell (d) Nonc of the above
(C) Answer in one sentence
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(ix) What is cell division ?
(x) Who discovered lysosome ?
(xi) What is spermatogenesis ?
(xii) Who discovered Cell ?
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2. (a) Structure of Prokaryotic cell.
(b) Functions of Plasma membrane.
(¢) Structure of Endoplasmic reticulum.
OR
(d) Structure of Eukaryotic cell.
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(e¢) Fluid Mosaic model of plasma membrane.
(f) Functions of endoplasmic reticulum.
3. Describe the following :
(g) Functions of Golgi complex.
(h) Ultrastructure of Ribosome
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(i) Structure of Mitochondria.
OR
(j) Structure of Golgi complex
(k) Functions of Ribosomes
(1) Functions of Lysosomes
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4. Describe the structure and functions of nucleolus.
OR
Describe the structure of lampbrush chromosomes and its significance.
5. Explain the following
(m) Significance of Meiosis
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(n) Spermatogenesis (labelled diagrammatic chart only).
(0) Metaphase of mitosis.
OR
(p) Significance of mitosis
(q) Structure of mature sperm.
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(r) Mechanism of Fertilization
6. Describe the extra embryonic membranes in chick.
OR
Give an account of cleavage and blastulation in frog.
7. Attempt the following :
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(s) Uses of stem cells.
(1) Significance of parthenogenesis.
(u) Choriovitelline placenta.
OR
(v) Types of stem cells
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(w) Functions of placenta.
(x) Type of parthenogenesis
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