Plant Biotechnology MCQs

Question 1

Match the following plant sources with their secondary metabolites and medical uses. Source plant Secondary metabolites Medical use P. Belladonna 1. Menthol a. Cancer treatment Q. Foxglove 2. Atropine b. Heart disease R. Pacific yew 3. Digitalin c. Eye examination S. Eucalyptus 4. Taxol d. Cough

Accepted Answer

P-2-c, Q-3-b, R--4-a, S-1-d

Answer

P-3-c, Q-2-a, R-1-d, S-4-b

Answer

P-2-c, Q-4-b, R-1-a, S-3-d

Answer

P-1-b, Q-4-c, R-2-d, S-3-a

Question 2

Hormone pairs required for a callus to differentiate are

Accepted Answer

Auxin and cytokinin

Answer

Auxin and gibberellin

Answer

Ethylene and gibberellin

Answer

Cytokinin and gibberellin

Question 3

Resistance to herbicide chlorsulfuron in plants is due to change in

Accepted Answer

Acetolactate synthase

Answer

Glutamine synthetase

Answer

Theronine deaminase

Answer

DNA polymerase

Question 4

The pungency of mustard seeds is primarily due to secondary metabolites such as isothiocyanate and nitrile. The pungency is usually felt only when the seeds are crushed. This is because of

Accepted Answer

The pungent chemicals are stored as inactive conjugates and compartmentalized from the enzymes that convert them into active chemicals

Answer

The coat of the intact seeds blocks the pungent volatiles from being released

Answer

The pungent chemicals are formed only after the reaction with atmospheric oxygen

Answer

The pungent chemicals are formed only after the reaction with atmospheric carbon dioxide

Question 5

Stable transformation of plants is reliably obtained by

Accepted Answer

Agrobacterium plasmid integration

Answer

Electroporation

Answer

Microinjection

Answer

Silicon carbide whisker

Question 6

Some of the cytokinins used in plant tissue culture media are given below: P. BAP Q. Zeatin R. Kinetin S. 2iP Which of these are synthetic analogs?

Accepted Answer

P and R only

Answer

P and Q only

Answer

Q and S only

Answer

R and S only

Question 7

Somatic embryogenesis is a procedure in plant tissue culture methodology described best as

Accepted Answer

Formation of stable embryos

Answer

Formation of both shoot and root meristem

Answer

Formation of axillary buds

Answer

None of the above

Question 8

Cells of meristemoid are best described as

Accepted Answer

Differentiated and dividing

Answer

Differentiated and non-dividing

Answer

Dedifferentiated and dividing

Answer

Dedifferentiated and non-dividing

Question 9

Determine the correctness or otherwise of the following Assertion [A] and the Reason [R]. Assertion [A]: A genetically engineered rice that produces beta-carotene in the rice grain is called Golden rice. Reason [R]: Enabling biosynthesis of provitamin A in the rice endosperm gives a characteristic yellow/orange color.

Accepted Answer

Both [A] and [R] are true and [R] is the correct reason for [A]

Answer

Both [A] and [R] are false

Answer

Both [A] and [R] are true but [R] is not the correct reason for [A]

Answer

[A] is true but [R] is false