71. The transfer of desirable genes from one plant species to another is called as _____.
A. rDNA technology
B. genetic engineering
C. plant genetic transformation.
D. plant transformation.
ANSWER: C
72. The length of Ti plasmid is ______kilobytes.
A. 20.
B. 200.
C. 2.
D. 2000.
ANSWER: B
73. Which technique is mostly related to protoplasts that can be regenerated to viable plants?
A. Electroporation.
B. Gene gun.
C. Microinjection.
D. Liposome mediated.
ANSWER: A
74. Which region codes for proteins involved in the uptake and metabolism of opines in Ti plasmids?
A. Promoter.
B. Vir.
C. Selectable Marker.
D. Opine catabolism.
ANSWER: D
75. Which plants have been developed for expressing antigens derived from animal viruses?
A. Tomato.
B. Tobacco.
C. Potato.
D. Corn.
ANSWER: A
76. In which year, the first clinical trials in humans using a plant derived vaccine were conducted?
A. 1987.
B. 1997.
C. 1977.
D. 1967.
ANSWER: B
77. The phenomenon of mature cells in meristematic state to produce callus is _____.
A. dedifferentiation.
B. redifferentiation.
C. totipotency.
D. all the above
ANSWER: A
78. The ability of callus cells to differentiate into a plant organ is called as _____.
A. dedifferentiation.
B. redifferentiation.
C. shoot-bud differentiation.
D. meristem differentiation.
ANSWER: B
79. The enzyme that can easily release the individual cells from the leaf tissues is ______.
A. macerozyme.
B. lysozyme.
C. zymogen.
D. chymotrypsin.
ANSWER: A
80. Name the type of culture that involves the addition of fresh nutrient medium and draining out the used medium?
A. Batch.
B. Continuous.
C. Discontinuous.
D. Open continuous.
ANSWER: B
