B.Sc. Biotechnology (Part III) Semester V (Old-CGPA)
Examination, 2018
plant development
Day and Date Monday, 19-11-2018 Total Marks 70
Time 2.30 p.m. to 5.00 p.m.
Instructions Figures to the right indicate full marks.
Draw a neat, well labeled, complete diagram wherever necessary.
Use of calculators, cell phones, or any other electronic gadgets is prohibited.
All questions are compulsory.
1. Choose a correct alternative from the following 14
The phenomenon of suppression of growth of an axillary bud in the presence of the terminal bud on the branch is known as
Lateral dominance Apical dominance
Apical suppression Apical meristem
In embryo development, a filament of 6-9 cells arising from basal cell is known as
Hypophysis Epiphysis Suspensor Stock
is the meristem that gives rise to epidermis.
Ground meristem Procambium
Basal meristem Protoderm
is the fused product of two polar nuclei in the embryo sac.
Zygote Pollen
Definitive nucleus Antipodal
is the type of endosperm formation in which the first division and several of the following divisions are accompanied by wall formation.
Helobial Nuclear Cellular Acellular
Arabidopsis Thaliana is a member
Brassicaceae Arabidopsis
Asteraceae Bigniniaceae
Exine of pollen is composed of
Sporopollenin Chitin
Peptidoglycan Collagen
Cytokinins are involved in
Cell elongation Cell multiplication
Apoptosis Senescence
is the process of transfer of pollen grains from anther to stigma.
Fertilization Pollination
Microsporogenesis Emasculation
10) In cryogenic storage, pollen grains are stored at temperature.
80°C 196°C 37°C 10°C
11) Mature endosperm with any degree of irregularity and unevenness in its surface contour is called as endosperm.
Helobial Nuclear
Cellular Ruminate
12) is composed of a group of four cells, also known as center cells in Arabidopsis root meristem.
Quiescent center Cortical center
Endodermis Columella
13) Vegetative meristems are highly repetitive-they produce same or similar structures over and over again-and their activity can continue indefinitely, this phenomenon is known as
Indeterminate growth Definite growth
Immortality Cytodifferentiation
14) is substitution of sexual reproduction by an asexual multiplication process without nucleus or cell fusion.
Double fertilization Polyembryony
Endosperm Apomixis
2. Answer the following (Any Four). 8
What is double fertilization
Enlist the modes of pollination.
What is embryogenesis
Differentiate between diplospory and apospory.
Describe xylem tissue.
Write notes on (Any Two). 6
Why is Arabidopsis thaliana known as a model of plant development
Explain in brief-pollen germination.
Explain in brief-seed vernalization.
3. Answer the following (Any Two). 8
Discuss the methods of pollen storage.
Discuss the classification of seeds on the presence or absence of endosperm.
Explain the stages of embryo development.
Answer the following (Any One). 6
Give a detailed account on root development.
Give a detailed account on structure and synthesis of plant cell walls.
4. Answer the following (Any Two). 10
Explain the mechanism of fertilization.
Give a detailed account on polyembryony.
Give a general account of phytohormone.
Answer the following (Any One). 4
Explain the concept of pollen embryos.
Explain the concept of sporophytic and gametophytic self-incompatibility.
5. Answer the following (Any Two) 14
Explain in detail-Development of female gemetophyte.
Give a detailed account on development of endosperm.
Write a note on-biochemistry and molecular biology of fruit maturation.