131. Which type of continuous cultures is highly useful for studies related to cytodifferentiation and production of secondary metabolites?
A. chemostat.
B. closed
C. turbidostat.
D. batch.
ANSWER: B
132. An organised existence of majority of cells in same cell cycle phase simultaneously is termed as ______.
A. synchronization.
B. asynchronization.
C. growth curve.
D. cryopreservation.
ANSWER: A
133. The culture in which cell cycles for majority of cultured cells occur simultaneously is called ______culture.
A. batch.
B. synchronous.
C. asynchronous.
D. suspension.
ANSWER: B
134. The physical treatment method of synchronous culture is ______.
A. cold treatment.
B. chemical inhibition.
C. colchicines.
D. starvation.
ANSWER: A
135. The strong inhibitor is ______.
A. dimethlsulphoxide.
B. hydroxylamine.
C. 5-flurodeoxypurine.
D. colchicines.
ANSWER: D
136. The measurement of viability of cultured cells is identified by ______.
A. fluorescent microscopy.
B. tryphan blue stains
C. fluorescein diacetate method.
D. Binocular dissected microscope.
ANSWER: C
137. The measurement of growth of cultures is determined by ______.
A. cell counting.
B. packed cell volume.
C. cell dry weight.
D. all the above.
ANSWER: D
138. The most extensively studied system for various aspects of somatic embryogenesis in ______.
A. carrot.
B. corn.
C. maize.
D. tomato.
ANSWER: A
139. When embryogenesis occurs directly on explants without production of callus it is called _____ embryogenesis.
A. direct.
B. indirect.
C. reversible.
D. irreversible.
ANSWER: A
140. When explants produce callus and forms embryo is called ________ embryogenesis.
A. indirect.
B. direct.
C. reversible.
D. irreversible.
ANSWER: A
