CELL BIOLOGY-suply 2k9

Code No: 43111 Set No. 1
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
CELL BIOLOGY
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. What is the general organization of a prokaryotic cell and explain functions of each
organalle or structure with in it. [16]
2. Write a brief account on :
(a) Cilia
(b) Flagella. [8+8]
3. Which organelle is called as the “power house of the cell”. Explain why? [16]
4. Explain the differences between active and passive transport giving suitable exam-
ples. [16]
5. (a) What are FtsZ proteins?
(b) Explain their role in the Binary fission in prokaryotes? [6+10]
6. (a) What are embryonic stem cells?Why are these cells called as totipotent cells?
(b) Explain the role of embryonic stem cells in repairing the defective tissues.
[8+8]
7. Describe the different kinds of intercellular signaling strategies Give a suitable ex-
ample for each strategy. [16]
8. Explain with an experimental strategy how transgenic mice can be used as a model
to uncover the function of cancer critical genes? [16]
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Code No: 43111 Set No. 2
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
CELL BIOLOGY
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. Classify the cells based on cell complexity with respect to cell size, shape and
components. [16]
2. Write a short note on:
(a) Integral proteins
(b) Phospholipids
(c) Peripheral proteins
(d) Actin. [4×4]
3. Write about the organelle which can synthesise food material from Sunlight. [16]
4. Explain the differences between endocytosis and exocytosis and discuss their sig-
nificance in the cellular activity. [16]
5. (a) Explain the role of Mitogens in stimulating the cell division?
(b) What is the role of Growth factors and survival factors during cell division?
[10+6]
6. Explain with at least one suitable example that homologous proteins that play a
role in animal development function interchangeably in mice and flies? [16]
7. (a) What is action potential?
(b) Explain the mechanism, how electrical impulses lead to secretion of neuro-
transmitter? [4+12]
8. (a) Explain how microarray strategy could be used in detection of genes involved
in cancer progression?
(b) Name at least one gene that was identified by this approach in highly metasta-
tic cells? [13+3]
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Code No: 43111 Set No. 3
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
CELL BIOLOGY
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. Name few instruments that are used to observe different types of cells. Which
instrument is now widely used to observe tiny cells. Give shapes of few existing
cells. [16]
2. Describe the role of microfilaments in cell motility. [16]
3. One organelle in the Eukaryotic cell has evolved from a prokaryotic cell that gained
entry by ‘endosymbiotic process’- Name the organelle and write about its functions.
[16]
4. Write about the methods of transport process driven by ATP. [16]
5. Explain how cell cycle control system depends on cyclical proteolysis? What is the
role of Ubiquitin in this process? [16]
6. Explain how changing patterns of cell adhesion molecules force cells into new
arrangement? [16]
7. “Different cells respond differently to the same extracellular signal molecule”- com-
ment on this statement with particular reference to the action of acetyl choline
signaling molecule. [16]
8. Explain how in a population of telomere deficient cells, the loss of p53 facilitates
the development of cancer? [16]
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Code No: 43111 Set No. 4
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
CELL BIOLOGY
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. Write in detail about the different functions of cells in the body. [16]
2. Briefly discuss the different types of intermediate filaments and their role in a cell.
[16]
3. Write short notes on
(a) Photosystem- II
(b) Chemi-osmotic theory
(c) Nuclear pore complex
(d) Chlorophyll. [4×4]
4. What is simple diffusion? Explain how it differs from active transport. [16]
5. Name the two cytoskeletal machines that operates in M-phase that ensures Mitosis
always precedes cytokinesis? [16]
6. Explain with at least one suitable example that homologous proteins that play a
role in animal development function interchangeably in mice and flies? [16]
7. Explain how signaling by phosphorylation and signaling by GTP-binding protein
acts as molecular switches in intra cellular signaling proteins? [16]
8. Explain in detail what is genetic instability? Explain the mechanism involved in
cancer cells that lead to genetically instability? [16]
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