Discussion
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- Question
Single stranded circular RNA encapsidated with a larger RNA in a plant virus is
Options- A. a virion
- B. a viroid
- C. a virusoid
- D. none of these
- Correct Answer
- a virusoid
- 1. Water moves into roots of plants by
Options- A. osmosis
- B. active transport
- C. diffusion
- D. pressure flow mechanism Discuss
- 2. Which of the modification in hemoglobin is the cause of sickle cell anemia?
Options- A. A mutation in the beta chain
- B. A deletion in the beta chain
- C. Replacement of the B chain by D chain
- D. None of the above Discuss
- 3. The human fibroplast is a classical example of
Options- A. stable primary cell lines
- B. established cell lines
- C. cell transformations
- D. none of these Discuss
- 4. Plant transformation vectors based on Agrobacterium can generally be divided into
Options- A. two vectors
- B. four vectors
- C. six vectors
- D. eight vectors Discuss
- 5. The degree or extent to which a given genotype is expressed phenotypically in a particular individual is defined as
Options- A. penetrance
- B. expressivity
- C. inheritance strength
- D. environmental influence Discuss
- 6. Virulence trait of Agrobacterium tumefaciens is borne on
Options- A. chromosomal DNA
- B. tumour inducing plasmid DNA
- C. both chromosomal and plasmid DNA
- D. cryptic plasmid DNA Discuss
- 7. Why do some redox reactions in cells result in the transfer of electrons from a reductant with a higher standard redox potential to an oxidant with a lower standard redox potential?
Options- A. Redox potentials are defined under standard conditions, and cellular conditions are typically not standard conditions
- B. The rules governing oxidation and reduction apply only in vitro, and not in vivo
- C. Electrons always go from reductants with high redox potentials to oxidants with low redox potentials
- D. None of the above Discuss
- 8. Which of the following statements is false?
Options- A. Continuous variation produces a spread of variation within a population
- B. Discontinuous variation is the result of genetics alone
- C. Blood group is an example of discontinuous variation
- D. Discontinuous variation is influenced by the environment Discuss
- 9. The intervention in the communication system of nematodes offer several possibilities of bio control. Which of the following(s) play(s) a very important role in the host recognition?
Options- A. Protein
- B. Lipid
- C. Carbohydrate moiety
- D. Minerals Discuss
- 10. Which of the following changes occur during first phase of growth of Penicillium chrysogenum?
Options- A. Growth of mycelia occurs
- B. Ammonia is liberated in the medium
- C. Lactic acid present in the corn steep liquor is utilized at the maximum rate
- D. All of the above Discuss
More questions
Correct Answer: osmosis
Correct Answer: A mutation in the beta chain
Correct Answer: stable primary cell lines
Correct Answer: two vectors
Correct Answer: expressivity
Correct Answer: tumour inducing plasmid DNA
Correct Answer: Redox potentials are defined under standard conditions, and cellular conditions are typically not standard conditions
Correct Answer: Discontinuous variation is influenced by the environment
Correct Answer: Carbohydrate moiety
Correct Answer: All of the above
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