Biology Multiple Choice Questions and Answers for Different Competitive Exams

Multiple Choice Questions on Plant Biotechnology

1. Plant biotechnology involves
a) production of valuable products in plants
b) rapid clonal multiplication of desired genotypes
c) production of virus free plants
d) all of these

2. The most common solidifying agent used in micropropagation is
a) agar
b) dextran
c) Mannan
d) all of these

3. The culturing of cells in liquid agitated medium is called
a) liquid culture
b) micropropagation
c) Agar culture
d) suspension culture

4. Which of the following is best suited method for production of virus free plants
a)embryo culture
b) meristem culture
c) ovule culture
d) anther culture

5. Batch cultures are type of suspension culture where
a) medium is continuously replaced
b) medium is loaded only at the beginning
c) no depletion of medium occurs
d) cellular wastes are continuously removed and replaced

6. Immobilized cell bioreactors are based on
a) cells cultures in solid medium
b) cells cultured in liquid medium
c) cells entrapped in gels
d) all of these

7. All are plant derived alkaloids except
a) menthol
b) nicotine
c) quinine
d) codeine

8. Elicitors are molecules that
a) induce cell divison
b) stimulate production secondary metabolites
c) stimulate hairy root formation that accumulate secondary metabolites
d) none of these

9. All are plant derived elicitors except
a) chitin
b) pectin
c) cellulose
d) pectic acid

10. The modification of exogenous compounds by plant cells is called
a) Biotransformation
b) bioconversion
c) both a and b
d) biophytomodification

11. Artificial seeds are
Artificial seeds
a) seeds produced in laboratory condition
b) seeds encapsulated in a a gel
c) somatic embryos encapsulated in a gel
d) zygotic embryos encapsulated in a gel

12. Hairy root cultures for secondary metabolite production are induced by transforming plant cells withs
a) virus
b) Agrobacterium tumefaciens
c) Bacillus thuringiensis
d) Agrobacterium rhizogenes

13. The variation in invitro culture is called as
a) invitro variation
b) mutation
c) somaclonal variation
d) all of these

14. Haploid plants are produced in large numbers by
a) anther culture
b) Ovary culture
c) both a and b
d) embryo culture

15. Cybrids are
a) nuclear hybrids
b) hybrid plants derived from cross pollination
c) cytoplasmic hybrids
d) cytological hybrids

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Answers:
1. d) all of these
2. a)agar
3. d) suspension culture
4. b) meristem culture
5. b) medium is loaded only at the beginning
6. c) cells entrapped in gels
7. a) menthol
8. b) stimulate production secondary metabolites
9. a) chitin
10. c) both a and b
11. c) somatic embryos encapsulated in a gel
12. d) Agrobacterium rhizogenes
13. c) somaclonal variation
14. c) both a and b
15. c) cytoplasmic hybrids

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