Transgenic Plant MCQs

Question 1

Which of the following gene detoxifies herbicide phosphinothricin?

Accepted Answer

Phosphinothricin acetyl transferase

Answer

Nitrilase

Answer

Glutathione S-transferase (GST)

Answer

All of these

Question 2

Plants derived sexually from the same plant are____ while those derived from somatic tissue from the same plant are____.

Accepted Answer

different, identical

Answer

identical, different

Answer

different, also different

Answer

plants cannot be derived from somatic tissue

Question 3

Transgenic plants with increased tolerance to aluminum have been produced by making plants that

Accepted Answer

secrete citrate into the soil

Answer

secrete phytosiderophores into the soil

Answer

make more metal-binding peptides like phytochelatins

Answer

bind aluminum to the cell wall

Question 4

Transplastomics

Accepted Answer

targets genes in the chloroplast

Answer

provides exceptionally low yields of protein products

Answer

produces genes that are released in pollen

Answer

offers little opportunity for practical use

Question 5

Plants containing genes encoding cytokines and blood clotting factors are used in

Accepted Answer

pharmaceutical production

Answer

nutrition improvement

Answer

vaccine production

Answer

textile production

Question 6

The first transgenic plants expressing engineered foreign genes were tobacco plants produced by the use of

Accepted Answer

Agrobacterium tumefaciens

Answer

Bacillus thuringiensis

Answer

Arabidopsis thaliana

Answer

Streptomyces hygroscopicus

Question 7

Transgenic plants

Accepted Answer

both (a) and (b)

Answer

contain foreign genes in their cells

Answer

are used to produce human antibodies

Answer

are plants that differ in geographical locations

Question 8

Low temperatures induce the expression of many cold-induced genes. Transgenic plants with improved cold tolerance have been produced by

Accepted Answer

expressing the protein that activates expression of these genes all the time in plants

Answer

cooling plants using the Peltier effect

Answer

expressing a gene for production of antifreeze (ethylene glycol) in plants

Answer

increasing evaporative cooling from leaf surfaces

Question 9

Nitrilase is encoded by

Accepted Answer

gene bxn in Klebsiella pneumoniae

Answer

bar gene in Streptomyces spp

Answer

both (a) and (b)

Answer

none of these