Avermectins (AVM) are macrocyclic lactones which have potent antihelminthic and insecticidal action. They are generally derived from the mycelia of
A -
Streptomyces avermitilis
B -
B. thrunigiensis
C -
P. flourescens
D -
L. peruvianum
3-
The tumor phenotype, which can be maintained indefinitely in tissue culture, results from the expression of genes on the
A -
r-DNA
B -
c-DNA
C -
T-DNA
D -
m-RNA
4-
Which of the following have been used for cryo-preservation of germplasm with 90% tissue survival and 10%plant regeneration that are used in international exchange of germplasm?
A -
Meristem tip cultures
B -
Embryo cultures
C -
Both (a) and (b)
D -
Embryo cultures supplemented with GA3 and coconut milk
5-
Establishment of embryogenic cell suspensions with high regeneration potential is a pre-requisite for successful
A -
protoplast culture
B -
detection of nucleic acid sequence
C -
restriction of fragment length polymorphisms
D -
microinjection
6-
Which of the following technique can be used to develop nematode resistant plants?
A -
Embryo-rescue
B -
Mutation
C -
Non-recombinant DNA
D -
All of these
7-
Random amplified polymorphic DNA (RAPD) is a method that
A -
stimulate production of sense RNA to compensate
B -
activate the expression of all genes in a biochemical pathway
C -
eliminate the expression of all genes in a biochemical pathway
D -
reveals intra-specific variation and diversity between species
8-
Which of the following transfers a set of genes encoded in a region called T-DNA of the Ti-plasmid into cells at wound positions?
A -
A. tumefaciens
B -
L. peruvianum
C -
L. birsutum
D -
A. sterilis
9-
Which of the following govern sporophytic self-incompatibility in Brassica?
A -
Aegilops
B -
Triticum
C -
Both (a) and (b)
D -
S alleles
10-
Commercial sugarcane is heterozygons with germplasm from
