M.Sc. (Semester II) (CBCS) Examination Mar/Apr-2018
Botany
CELL AND MOLECULAR BIOLOGY OF PLANTS
Time: 2½ Hours
Max. Marks: 70
Instructions: Answers any five questions. Figures to right indicate full marks. Question 1 is compulsory. Answer any two questions from Q.2, 3 4. Answer any two questions from Q.5, 6 7.
Q.1
Choose the correct answer form the given alternatives:-
14
The proteins are extremely lipophilic and form the backbone of cell membrane.
Enzyme
Structural
Carrier
Storage
The lipid of the cell membrane contains hydrophilic heads and tails.
hydrophilic
hydrophobic
no
both hydrophobic and hydrophilic
Singer and Nicolson (1972) put forwarded model of membrane.
fluid-mosaic
lipid pillar

unit
greater
involves folding of the plasma membrane around the material that is being engulfed and subsequent formation of an intracellular vesicle.
Phagocytosis
Pinocytosis
Secretion
Exocytosis
The liver cells have golgi complexes.
one
ten
fifty
one hundred
The cytoplasm of all eukaryotic cells contains hollow fibrillar structures called
capillaries
threads
microtubules
filaments
The rough endoplasmic reticulum is so called because the membranes are covered with giving them a rough appearance.
ribosome
chloroplast
mitochondria
liposome
The inner membrane of mitochondria contain enzyme.
Oxidase
Hexokinase
NADH cytochrome reductase
ATPase
The string of nucleosome is coiled in to a 300A diameter and from a structure of
solenoid
cylinder
O
unit fiber
superhelliccal
Page 2 of 2
SLR-UD-119
10) The DNA strand to replicating in a discontinuous manner, synthesize short fragments called
Replication fork
Korenberg fragment
Okazaki fragments
Template fragment
11) A triplet or three-letter genetic code was first suggested by the physicist
Crick (1952)
Gamow (1954)
Watson (1953)
Watson and crick (1953)
12) The chisma formation occurs in
Pachytene
Zygotene
Leptotene
Diplotine
13) Indirect immunofluorescence involves fluorescently labeled
Immunoglobulin specific antibodies
Antigen specific antibodies
Heptanes specific antibodies
Carriers specific antibodies
14) Inactivation of is one of the steps leading to the development of cancer.
Tumor suppressor genes
Oncogenes
Growth factors
Stem cells
Q.2
Write in short about ion carriers and receptors in relation to plasma membrane.
07
Describe the structure and functions of microtubules and microfilaments.
07
Q.3
Describe the function of the plasmas membrane.
07
Comment up on the genome organization in chloroplast.
07
Q.4
What are plasmodesmata? Describe its structure along with gap junction.
07
Write in short about biogenesis and functions of mitochondria.
07
Q.5
Write briefly
DNA Replication
05
Retinoblastoma and E2F proteins
05
Functions of satellite and selfish DNA
04
Q.6
Describe:-
In situ hybridization technique
05
Contribution of Nirenberg and Khorana
Confocal microscopy
05 04
Q.7
Write a short note (Any three)
14
Degeneracy of code
Apoptosis
DNA repair mechanism
Cyclins