Questions and answers for exam Preparation

MCQs

Total Questions : 282 | Page 23 of 29 pages

Question 221. In order to insert a foreign gene into a plasmid, both must __________

be of the same length
be cut by the same restriction enzyme
have identical DNA sequences
originate from the same type of cell

Discuss Question

Answer: Option B. -> be cut by the same restriction enzyme

Question 222. The transfer of antibiotic-resistant genes from genetically engineered bacteria to disease-causing bacteria __________ .

has occurred
seems unlikely
would be of no concern if it occurred.
can never occur

Discuss Question

Answer: Option B. -> seems unlikely

Question 223. Which of the following techniques can be used to determine the defective gene and for developing cancer?

Southern blot
Northern blot
Western blot
Eastern blot

Discuss Question

Answer: Option A. -> Southern blot

Question 224. Which of the following genetic diseases would be amenable to genetic engineering?

Cystic fibrosis
Muscular dystrophy
Cri du Chat
Down's syndrome

Discuss Question

Answer: Option A. -> Cystic fibrosis

Question 225. X-rays cause

ionization of water in the cell
heat
the formation of thymine dimers
None of these

Discuss Question

Answer: Option A. -> ionization of water in the cell

Question 226. Why is golden rice pale yellow in color?

It is rich in chlorophyll b.
It is rich in phycobilins.
It is rich in chlorophyll a.
It is rich in beta-carotene.

Discuss Question

Answer: Option D. -> It is rich in beta-carotene.

Question 227. The order for the construction of a cDNA fragment from mRNA is to

bind oligo-dC, treat with reverse transcriptase, digest with RNase, add G residues to the 3' end, bind oligo-dT and treat with DNA polymerase
treat with reverse transcriptase, digest with RNase, add G residues to the 3' end, bind oligo-dC, treat with DNA polymerase and bind oligo-dT
digest with RNase, add G residues to the 3' end, treat with reverse transcriptase, add G residues to the 3' end and treat with DNA polymerase
bind oligo-dT, treat with reverse transcriptase, digest with RNase, add G residues to the 3' end, bind oligo-dC, treat with DNA polymerase

Discuss Question

Answer: Option D. -> bind oligo-dT, treat with reverse transcriptase, digest with RNase, add G residues to the 3' end, bind oligo-dC, treat with DNA polymerase

Question 228. The TP53 gene of chromosome 17 codes for a protein __________ .