Questions and answers for exam Preparation

MCQs

Total Questions : 107 | Page 6 of 11 pages

Question 51. Resistance to sulphonyl urea compounds in transgenic tobacco plant has been developed by the transfer of

gene for GS (glutamine synthase)
gene for ALS (acetolactate synthase)
gene for EPSPS (5-enol-pyruvyl shikimat 3 phosphate synthase)
any of the above

Discuss Question

Answer: Option B. -> gene for ALS (acetolactate synthase)

Question 52. In transgenic plants that have been manipulated to express patho-genesis-related (PR) proteins all the time it has been shown that

expression of one PR protein provides high levels of protection against many pathogens
these provide no protection at all against pathogens
expression of two PR proteins provides some protection against a few pathogens
these proteins trigger the production of other antimicrobial defenses

Discuss Question

Answer: Option D. -> these proteins trigger the production of other antimicrobial defenses

Question 53. The controversy regarding the use of Bt corn is that it

is potentially harmful to monarch butterflies
is a potential allergen to humans
both (a) and (b)
can contaminate groundwater

Discuss Question

Answer: Option C. -> both (a) and (b)

Question 54. In a __________ protocol, bacteria with engineered abilities to detoxify pollutants are intentionally released in an area.

microcosm establishment
mibridization
bioremediation
rhizosecretion

Discuss Question

Answer: Option C. -> bioremediation

Question 55. Starch content of potatoes can be increased by using a bacterial gene, known as

sucrose phosphate synthase gene
ADP glucose pyrophosphorylase gene
polygalactouranase gene
none of the above

Discuss Question

Answer: Option B. -> ADP glucose pyrophosphorylase gene

Question 56. Metabolic interference is a term used to describe a method to metabolize a compound and prevent the synthesis of something that is normally produced. What compound(s) have been targeted for metabolic interference in tomato?

ACC (1-aminocyclopropane-1-carboxylic acid)
SAM (S-adenosylmethionine)
Both (a) and (b)
AOA (aminooxyacetic acid)

Discuss Question

Answer: Option C. -> Both (a) and (b)

Question 57. Which of the following metabolites are implicated in stress tolerance?

Proline
Betaines
Both (a) and (b)
Citrate

Discuss Question

Answer: Option C. -> Both (a) and (b)

Question 58. Which of the agricultural challenges below cannot be solved with transgenic techniques?

Crops are damaged by frost
Crops are killed by a virus
Public concern about safety of synthetic pesticides
Public preference for organic vegetables

Discuss Question

Answer: Option D. -> Public preference for organic vegetables

Question 59. Which tropical fruit crop has been successfully engineered to be protected against a lethal virus?

Passion fruit
Papaya
Mango
Lychee

Discuss Question

Answer: Option B. -> Papaya

Question 60. Which of the following statements is true regarding genomics?

Plant genomics lags behind similar efforts in animals and microorganisms
Researchers can make use of genomic information even if the entire genome of an organism is not known
Researchers are busy in trying to determine the genome of the potato plant
All of the above

Discuss Question

Answer: Option D. -> All of the above