ZOO/V/CC/09 Student's Copy
2 0 1 8
CBCS
5th Semester
ZOOLOGY
FIFTH PAPER
Cell Biology
Full Marks 75
Time 3 hours
PART A—OBJECTIVE
Marks 25
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 10
Tick the correct answer in the brackets provided 1×10=10
1. Plasma membrane is basically composed of
phospholipid bilayer
glycoproteins
proteins and carbohydrates
carbohydrates
2. Cell was first named by
Antoni van Leeuwenhoek
Robert Hooke
Charles Darwin
None of them
/138 1 Contd.
3. Which of the following cell organelles are involved in lipid metabolism?
Peroxisomes
Mitochondria
Ribosomes
All of the above
4. The function of ribosome is
DNA synthesis
amino acid synthesis
protein synthesis
All of the above
5. Oxysomes of F0-F1 particles occur on
mitochondrial outer membrane
thylakoid
mitochondrial inner membrane
None of the above
6. Cristae occur on mitochondrial
matrix
inner membrane
outer membrane
All of the above
7. Pore-like structural connections between adjacent cells is an example of
gap junction
desmosome
tight junction
cell junction
8. Junction that prevents two cell compartments from mixing is
gap junction
desmosome
cell junction
tight junction
ZOO/V/CC/09/138 2 Contd.
9. DNA replication occurs at which of the following stages of the cell cycle?
G1 stage
S stage
G0 stage
M phase
10. Which of the following is not a characteristic of cancer cells?
Loss of cell cycle control
Transplantability
Loss of contact inhibition
Loss of DNA replication
SECTION—B
Marks 15
Write short notes on the following 3×5=15
1. Characteristic features of prokaryotic cell
OR
Facilitated diffusion
2. Function of ribosomes
OR
Functions of Golgi complex
3. Endocytosis
OR
Mitochondrial DNA
4. Tight junctions
OR
Proteoglycans
5. Types of cancer
OR
Carcinogens

PART B—DESCRIPTIVE
Marks 50
The questions are of equal value
1. Write a note on the cell theory including its tenets and limitations.
OR
Write a note on the fluid mosaic model of cell membrane with suitable diagram.
2. Explain the functions of lysosomes and peroxisomes with supporting diagrams.
OR
Write a note on the structure and function of endoplasmic reticulum.
3. Write a note on the structure of mitochondria with suitable diagram.
OR
Describe the structural and functional aspects of cytoskeleton.
4. Write a note on the transport across nuclear membrane with suitable diagram.
OR
Explain the structure and function of nucleolus.
5. Explain the cell cycle with suitable diagram.
OR
Explain the regulation of cell cycle through cyclin-CDK complex.