Biotechnology - Gene Transfer in Plants

Exercise :: Gene Transfer in Plants - Section 1

  • Gene Transfer in Plants - Section 1
21. 

Opines that are present in crown gall tumour include

A. octopine
B. nopaline
C. agropine
D. all of these

Answer: Option D

Explanation:

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22. 

Intermediate vectors containing T-DNA are conjugation deficient. Thus conjugation is mediated in presence of which of the following plasmid?

A. pRK 2013
B. pRN 3
C. either (a) or (b)
D. none of these

Answer: Option C

Explanation:

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23. 

Which of the following is true about T DNA?

A. Integration of T DNA can occur at many different, apparently random, sites in the plant nuclear DNA
B. Integration of T DNA occurs only at one specific sites in the plant nuclear DNA
C. Integration of T DNA occurs at two specific sites in the plant nuclear DNA
D. Integration of T DNA occurs at one site that may be random in the plant nuclear DNA

Answer: Option A

Explanation:

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24. 

Which of the following is not true about the direct repeats flanking T-DNA?

A. They are conserved between nopaline and octopine Ti-plasmids
B. These repeats are transferred intact to the plant genome
C. These are important in integration mechanism
D. all of the above

Answer: Option B

Explanation:

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25. 

The left segment of octopine T-DNA (TL) is necessary for

A. enzymes for agropine biosynthesis
B. tumour formation
C. conjugative transfer
D. all of these

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.