Biology MCQs: Biology & Human Welfare

Multiple Choice Questions on Plant Breeding

1. Breeding for disease resistance requires
a) a good source of resistance
b) Planned hybridisation
c) Diseases test
d) all of these

2. Polyploidy is induced through
a) Irradiation
b) Mutagenic chemicals
c) Ethylene
d) Colchicine

3. Heterosis is
a) Appearance of spontaneous mutations
b) Induction of mutations
c) Mixture of two or more traits
d) Superiority of hybrids over their parents.

4. The quickest method of plant breeding is
a) introduction
b) Selection
c) Hybridisation
d) Mutation Breeding

5. The new varieties of plants are produced by
a) Introduction and mutation
b) Selection and hybridisation
c) Mutation and Selection
d) Selection and Introduction

6. Pure line breed refers to
a) heterozygosity only
b) homozygosity only
c) homozygosity and self assortment
d) heterozygosity and linkage

7. A scientist wants to study the viral effects on plants. Which of the following part of the plant should be excluded?
a) pith
b) shoot apex
c) phloem
d) cortex

8. Somatic hybridisation is achieved through
a) Grafting
b) Conjugation
c) Protoplast fusion
d) Recombinant DNA technology

9. Bagging is done to
a) Avoid cross pollination
b) Avoid self pollination
c) Achieve desired pollination
d) Prevent contamination from foreign pollen

10. A technique of micropropagation is
a) Multiple root production
b) Somatic embryogenesis
c) Growth of micro organisms on culture medium
d) Multiple shoot production and embryo rescue

Answers
1. d) all of these
2. d) Colchicine
3. d) Superiority of hybrids over their parents.
4. d) Mutation Breeding
5. b) Selection and hybridisation
6. b) homozygosity only
7. b) shoot apex
8. c) Protoplast fusion
9. d) Prevent contamination from foreign pollen
10. b) Somatic embryogenesis

2 Comments
  1. Jaina 3 years ago

    In Q5 I think options are wrong because in all options one disease is caused by bacteria while the virus. Plz check it

  2. Profile photo of AvinashDS
    AvinashDS 4 years ago

    Hello sir,
    I started using this only from this month. I came to know about this recently.
    It is very useful. i thank you. It improves my test marks.
    Pl. can you post physics and chemistry also parallely as I can improve myself very well.
    Expecting your positive reply.
    Really thank you for your service.

    D.S.Avinash

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