61. ___________ plants can be developed from ovary culture.
A. Diploid.
B. Haploid.
C. Monocot.
D. Dicot.
ANSWER: B
62. The process can be used to bring two genetically different parents together for a common desirable character is called _____.
A. hybridization.
B. protoplast fusion.
C. propagation.
D. sexual reproduction.
ANSWER: B
63. Protoplasm fusion can be done by _____.
A. polyethylene glycol.
B. glycerol.
C. ethylene.
D. nitrogen.
ANSWER: A
64. A genome of an organism refers to its total _____.
A. haploid DNA.
B. number of proteins
C. number of chromosomes.
D. number of genes.
ANSWER: A
65. Enucleated protoplast is called _____.
A. cytoplast.
B. cybrid.
C. tonoplast.
D. duplast.
ANSWER: C
66. Liquid nitrogen is used as a cryoprotectant at _____ degree celcius.
A. -196.
B. -155.
C. -82.
D. -78.
ANSWER: A
67. Solid carbon dioxide is used as a cryoprotectant at _____ degree celcius.
A. -190.
B. -150.
C. -80.
D. -79.
ANSWER: D
68. Deep freezers are used as a cryoprotectant at _____ degree celcius.
A. -191.
B. -155.
C. -80.
D. -76.
ANSWER: C
69. Slow freezing method of cryopreservation is done at _____ degree celcius/min.
A. 0.5-5.0.
B. 0.4-5.0.
C. 0.3-5.0.
D. 0.2-5.0.
ANSWER: A
70. Which one of the following is used as cryoprotectant?
A. DMSO.
B. Glycerate.
C. Ethyl acetate
D. Calcium ions
ANSWER: A
