B.Sc. I (Biotechnology) (Semester (CBCS) Examination, 2018
cell biology and biostatistics
Paper I Cell Biology
Day and Date Tuesday, 13-11-2018 Total Marks 70
Time 10.30 a.m. to 1.00 p.m.
Instructions All questions are compulsory.
Draw neat and labeled diagram wherever necessary.
Figures to right indicate full marks.
1. Rewrite the following sentences by using correct alternative. 14
Mitochondria are known as of the cell.
Protein factory Suicide bags
Heart Power house
play important role in apoptosis.
Caspases Pectinase Nuclease Ribonuclease
genes responsible for causing cancer.
Proto-oncogenes Oncogenes
Tumor suppressor Luxury genes
In prokaryotes, initiation codon AUG codes for
Valine Methionine
Formylated Methionine Methylated Methionine
Microtubules are polymer of
Tubulin dimer Globular actin
Keratin Lamin
Plasma membrane is act as
Impermeable Selectively permeable
Freely permeable Transparent
In typical eukaryotic chromosomes, sister chromatids are held together by
Centromere Chromomere
Telomere Chromocentre
is a structure by which two adjacent cells are attached, formed from protein plaques in the cell membranes linked by filaments.
Desmosomes Hemi-desmosomes
Gap junction Tight junctions
are known as primary messenger molecule.
IP3 cAMP Hormones
10) Lampbrush chromosomes are found in oocytes of
Beetles Chironomus Maggots Monkey
11) is the process by which solutes are moved along a concentration gradient across a cell membrane.
Simple diffusion Active transport
Proton pump Na-K ATPase pump
12) Synapsis is occur in phase of prophase I in meiosis.
Diplotene Zygotene
Leptotene Pachytene
13) Signal sequence is required for
Protein degradation
Localization proteins in different compartments of the cell
Protein lysis
Prevention of degradation of proteins
14) is main component of bacterial cell wall.
Glycogen Cellulose Collagen Peptidoglycan
2. Answer the following questions (any 4). 8
What is cell growth
ii) Define euchromatin and heterochromatin.
iii) What are PPLOs
iv) What is cell synchrony
What are F-actin
vi) Distinguish between equational and reductional division.
Answer the following questions (any 2). 6
What are tight junctions
ii) Write note on polyribosomes.
iii) What is facilitated diffusion
3. Answer the following questions (any 2). 8
Describe structure giant chromosomes.
ii) Describe ultra structure of animal cell.
iii) Explain properties of cancer cell.
Answer the following (any 1). 6
Describe different types of cell signaling.
ii) Explain fluid mosaic model of plasma membrane.
4. Answer the following questions (any 2). 10
Describe ultra structure of nucleus.
ii) Describe structure and functions of microtubules.
iii) Describe active transport with suitable examples.
Answer the following (any 1). 4
Describe process of mitosis.
ii) Define genetic code and give its properties.
5. Answer the following questions (any 2). 14
Describe process of apoptosis.
ii) Explain different types of cell organelles, chloroplast and Golgi bodies.
iii) Describe process of protein trafficking in endoplasmic reticulum and mitochondria.