Which is/are the naturally occurring plant auxins? A. Indole acetic acid (IAA) B. Naphthalenacetic acid (NAA) C. 2,4-dichlorophenoxyacetic acid D. All of the above Which is/are the disadvantage/(s) of using IAA in plant cell culture media? A. It is unstable in solution B. Gets easily oxidized C. Conjugated to inactive form by plant cells D. All of the above To maintain the pH of the culture A. organic acid such as citric, fumaric, malic and succinic acid is used B. synthetic buffers such as Tris, MES or HEPS are used C. both (a) and (b) D. ammonium salts are used....

Which is the most common carbon source used in the plant cell culture media? A. Sucrose B. Glucose C. Fructose D. Maltose Which of the following is an ethylene biosynthesis inhibitor? A. Citric acid B. Succinic acid C. Activated charcoal D. Silver thiosulphate Nitrogen in the plant cell culture media is provided by either ammonia or nitrate salt. In the media A. utilization of ammonium cause culture pH to drop while utilization of nitrate cause culture pH to rise B. utilization of nitrate cause culture pH to drop while utilization of ammonium cause culture pH to rise C. utilization of both ammonium and nitrate result in rise in pH D. utilization of both ammonium and nitrate result in drop in pH....

In the meiotic cell divison in daughter cells are produced by two successive division in which A. first division is equational, second is reductional B. first division is reductional and second is equational C. both divisions are reductional D. both divisions are equational What is the approximate size (in kb) of the melon mitochondrial genome? A. 600 kilobase B. 1200 kilobase C. 2400 kilobase D. 3000 kilobase When an organism has a life cycle with alternation of generations, the haploid generation is the A. zygote B. gametophyte C. gamete D. sporophyte....

In the presence of carbon monoxide, nitrogen fixation A. increases B. decreases C. inhibits D. none of these View Answer Workspace Report Discuss in Forum An organism that relies exclusively on pre-synthesized food molecules is A. autotrophic B. photosynthetic C. prokaryotic D. heterotrophic View Answer Workspace Report Discuss in Forum In the Calvin cycle of C3 plants, which molecule is the acceptor of CO2? A. Erythrose-4-phosphate B. Ribulose-l,5-diphosphate C. Ribose-5-phosphate D. Alpha-ketoglutarate....

The volume of O2 liberated in photosynthesis has which of the following ratio to CO2? A. 1:1 B. 2:1 C. 1:2 D. 3:1.... Rice can grow in water submerged soil because the plants A. have spongy roots B. can oxidize the micro-environment around their roots and thus able to absorb oxygen C. are adapted to enable roots to ward off toxic products D. all of the above View Answer Workspace Report Discuss in Forum 22. Who among the following coined the term Biotechnology? A. Karl Ereky B. James Clarke C. Paul Terasaky D. Clarke and Sommer...

Archaeabacteria differ from the true bacteria as they have A. different cell membrane lipids B. cell wall composition C. ribosomal RNA structure D. growth not inhibited by antibiotics... In the bundle sheath of C4 plant __________ is/ are less than mesophyll. A. PSI B. PSII C. PSI or PSII D. PSI and PSII View Answer Workspace Report Discuss in Forum Triticale is derived by crossing A. wheat and rice B. wheat and tapioca C. rye (secale) and wheat D. rye and rice View Answer Workspace Report Discuss in Forum The major source of sugar in the world is A. watermelon B. beetroot....

Cosmids lack A. genes coding for viral proteins B. origin of replication C. marker genes coding for replication D. cleavage site for the insertion of foreign DNA.... Which group of plants has the greatest diversity (i.e. the most species) living today? A. Bryophyta B. Lycophyta C. Gymnosperms D. Angiosperms View Answer Workspace Report Discuss in Forum Which group of land plants is most restricted to moist environments? A. Lycophyta B. Sphenophyta C. Bryophyta D. Angiosperms View Answer Workspace Report Discuss in Forum What single feature is probably most responsible for the success of angiosperms? A. Seeds B. Fruit C. Broad leaves...

EMBL 3 and EMBL 4 are replacement vectors, which can clone DNA up to A. 6-7 kb B. 15-25 kb C. 40-44 kb D. 1-2 kb View Answer Workspace Report Discuss in Forum Size of the DNA that can be packaged into a λ phage is A. 50 kb B. 35-53 kb C. 40-50 kb D. any size... View Answer Workspace Report Discuss in Forum Charon 34 and Charon 35 are the examples of A. plasmid vector B. cosmid vector C. phage vector D. phagemid vector....

Plasmid incompatibility is A. inability of a plasmid to grow in the host B. inability of two different plasmids to coexist in the same host cell in the absence of selection pressure. C. both (a) and (b) D. none of the above View Answer Workspace Report Discuss in Forum P1 cloning vector allow cloning of DNA of the length of A. 100 kbp B. 50 kbp C. 20 kbp D. 10 kbp View Answer Workspace Report Discuss in Forum Charon 34 and Charon 35 can clone DNA upto A. 1-2 kb B. 6-7 kb C. 9-20 kb D. 30-35 kb.....

Maximum size of foreign DNA that can be inserted into a replacement vector is A. 25-30 kb B. 18-20 kb C. 20-25 kb D. 40-50 kb View Answer Workspace Report Discuss in Forum Which of the following is not true about phagemid? A. Contain functional origin of replication of the plasmid and λ phage B. May be propagated as a plasmid or as phage in appropriate strain C. Contain λ att site D. Can only be propagated as phage View Answer Workspace Report Discuss in Forum pBR 322 has/have which of the following selection marker(s)? A. Ampr B. Tetr C. Both (a) and (b) D. Kanr....