Class 12 Biology · Chapter 8 · Test 1
Genetic Engineering
41 MCQs
41 questions · 35 min · 41 marks
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Sample questions
The first 5 of 41. Try each one, then tap to see the answer.
Question 1
Identify the FALSE statement.
- ARestriction enzyme is used for the production of RFLPs.
- BDNA ligase enzyme is used to cut DNA, creating the sticky ends.
- CReverse transcriptase enzyme is used for making cDNA from mRNA.
- DElectrophoresis means the separation of DNA fragments.
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Answer: B
DNA ligase joins DNA fragments (molecular glue) while restriction endonucleases cut DNA to create sticky ends.
Question 2
Which method is used for obtaining the gene of interest?
- AArtificial gene synthesis
- BReverse transcription
- CCleavage from chromosome
- DAll of these
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Answer: D
The gene can be synthesised directly, made from mRNA by reverse transcription or cleaved from a chromosome.
Question 3
When a gene of interest is attached to the vector, the new molecule is called:
- ARecombinant DNA
- BRestriction length fragment
- CComplimentary DNA
- DGenomic library
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Answer: A
The vector carrying the gene of interest becomes recombinant DNA (rDNA).
Question 4
What is the use of plasmid in genetic engineering?
- ATo carry DNA to a cell
- BTo cut DNA
- CTo join pieces of DNA
- DTo replicate DNA
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Answer: A
Plasmids act as vectors that introduce the gene of interest into host cells.
Question 5
Which of these can serve as ideal expression system for gene cloning?
- ABacteriophages
- BBacterial cells
- CPlant cells
- DAnimal cells
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Answer: B
Bacterial cells are ideal because of their short generation time and simple genetic system.
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