6. In a plant tumor cell
A. complete Ti plasmid is incorporated in plant nuclear DNA
B. different parts of the Ti-plasmid are incorporated
C. only a small specific segment of callus T DNA is incorporated
D. may vary from plant to plant
7. Co-integrating transformation vectors must include a region of homology in
A. the vector plasmid
B. the Ti-plasmid
C. between vector plasmid and Ti-plasmid
D. none of these
8. Crown gall tissue
A. can be cultivated in vitro in the absence of bacteria
B. retains tumorous properties when cultivated
C. both (a) and (b)
D. shows tumorous properties only in the presence of bacteria
9. Integrated nopaline T-DNA occurs as
A. single segment
B. two segments
C. three segments
D. four segments
10. Opines are
A. amino acid derivatives found in tumor tissues
B. amino acid derivatives found in normal tissues
C. amino acid derivatives found in both normal as well as tumor tissues
D. none of the above