Which one of the following generates new
genetic combinations leading to variation ?
(1) Sexual reproduction
(2) Nucellar polyembryony
(3) Vegetative reproduction
(4) Parthenogenesis

Match column-I with column-II and select the
correct option using the codes given below :
Column-I Column-II
a)Pistils fused (i) Gametogenesis
together
(b) Formation of (ii) Pistillate
gametes
(c) Hyphae of higher (iii) Syncarpous
Ascomycetes
(d) Unisexual female (iv) Dikaryotic
flower
a b c d
(1) i ii iv iii
(2) iii i iv ii
(3) iv iii i ii
(4) ii i iv iii

In majority of angiosperms :
(1)reduction division occurs in the mgaspore
mother cells
(2) a small central cell is present in the
embryo sac
(3) egg has a filiform apparatus
(4) there are numerous antipodal cells

Pollination in water hyacinth and water
lily is brought about by the agency of :
(1) birds
(2) bats
(3) water
(4) insects or wind

The ovule of an angiosperm is technically
equivalent to :
(1) megaspore mother cell
(2) megaspore
(3) megasporangium
(4) megasporophyll

Taylor conducted the experiment to prove
semiconservative mode of chromosome
replication on :
(1) Drosophila melanogaster
(2) E. coli
(3) Vinca rosea
(4) Vicia faba

The mechanism that causes a gene to move
from one linkage group to another is called :
(1) Translocation
(2) Crossing-over
(3) Inversion
(4) Duplication

The equivalent of a structural gene is :
(1) Operon
(2) Recon
(3) Muton
(4) Cistron

A true breeding plant is :
(1) near homozygous and produces offspring of
its own kind
(2) always homozygous recessive in its genetic
constitution
(3) one that is able to breed on its own
(4) produced due to cross-pollination among
unrelated plants

Which of the following rRNAs acts as
structural RNA as well as ribozyme in bacteria ?
(1) 23 S rRNA
(2) 5.8 S rRNA
(3) 5 S rRNA
(4) 18 S rRNA

Stirred-tank bioreactors have been designed for :
(1) availability of oxygen throughout the process
(2) ensuring anaerobic conditions in the culture vessel
(3) purification of product
(4) addition of preservatives to the product

A foreign DNA and plasmid cut by the same
restriction endonuclease can be joined to form a
recombinant plasmid using :
(1) Polymerase-III
(2) Ligase
(3) Eco RI
(4) Taq polymerase

Which of the following is not a component of
downstream processing ?
(1) Preservation
(2) Expression
(3) Separation
(4) Purification

Which of the following restriction enzymes
produces blunt ends ?
(1) Xho I
(2) Hind III
(3) Sal I
(4) Eco RV