Plant Biotechnology MCQs

Question 1

Gynogenesis is a process of development of haploid plants

Accepted Answer

From an unfertilized cell of female gametophyte

Answer

From a fertilized cell of female gametophyte

Answer

From isolated pollen grains

Answer

By selective elimination of chromosomes following distant hybridization

Question 2

Parthenogenetic embryos in plants are those which are formed by

Accepted Answer

Unfertilized eggs

Answer

Fertilized eggs

Answer

Sporophytic cells

Answer

Male gametophyte

Question 3

Large scale clonal propagation practically means raising a population of plantlets from

Accepted Answer

Many explants from a single plant

Answer

A single cell

Answer

A single explant

Answer

Many explants from a group of plants

Question 4

Determine the correctness or otherwise of the following Assertion (A) and Reason (R). Assertion: In direct somatic embryogenesis, embryos are developed without going through callus formation. Reason: This is possible due to the presence of pre embryonically determined cells.

Accepted Answer

Both (A) and (R) are true and (R) is the correct reason for (A)

Answer

Both (A) and (R) are true but (R) is not the correct reason for (A)

Answer

(A) is false but (R) is true

Answer

(A) is true but (R) is false

Question 5

The following are useful to introduce genes into crop plants except

Accepted Answer

Auxin

Answer

Ti plasmid

Answer

Particle gun

Answer

Breeding

Question 6

Determine the correctness or otherwise of the following Assertion (A) and the Reason (R). Assertion: The enzymatic degradation of cell wall to obtain single cell called protoplast has helped immensely in developing somatic cell genetics in plants. Reason: In plants or animals, fusion of two cells must occur through the plasma membrane.

Accepted Answer

Both (A) and (R) are true and (R) is not the correct reason for (A)

Answer

Both (A) and (R) are true and (R) is the correct reason for (A)

Answer

(A) is true but (R) is false

Answer

(A) is false but (R) is true

Question 7

The Bt toxin gene from Bacillus thuringiensis used to generate genetically modified crops is

Accepted Answer

Cry

Answer

Cro

Answer

Cdc

Answer

Cre

Question 8

Embryo rescue is a useful technique to

Accepted Answer

All of the above

Answer

Grow/generate hybrids between different plant species

Answer

Complete the growth of embryos susceptible to defects in seed development

Answer

Break the dormancy of seeds

Question 9

Which one of the following plant secondary metabolites is a natural insecticide?

Accepted Answer

Pyrethrin

Answer

Digitoxin

Answer

Salicylic acid

Answer

Avenacin A-1