Tag: biotechnology and genetic engineering

Questions Related to biotechnology and genetic engineering

Introduction of food plants developed by genetic engineering is not desirable because

  1. these products are less tasty as compared to the already existing products

  2. this method is costly

  3. economy of developing countries may suffer

  4. there is danger of entry of viruses and toxins with introduced crop


Correct Option: B

Genetic engineering is possible because

  1. the phenomenon of transduction in bacteria is well understand.

  2. we can see DNA by electron microscope

  3. we can cut DNA at specific sites by endonucleases like DNAase 1

  4. restriction endonucleases purified from bacteria can be used in vitro


Correct Option: D

Genetically engineered bacteria are being used in commercial production of

  1. Melatonin

  2. Testosterone

  3. Human insulin

  4. Thyroxine


Correct Option: C

Plasmid is boon to biotechnology (with reference to production of insulin).

  1. True

  2. False


Correct Option: A
Explanation:

Plasmid is boon to biotechnology. By the used of plasmids of E. coli, it is possible to produce insulin polypeptide chains separately. This has enable the artificial production of mature human insulin commercially. In this, genome corresponding to the polypeptide chain A and B of insulin are synthesized in vitro. These are then introduced into plasmid of E.coli. Under selected medium, the polypeptides A and B are expressed highly. These are extracted and combined by creating disulphide bridge to form artificial human insulin.

Thus, the correct answer is 'True.'

Genetically engineered insulin is considered better for human diabetic patients over that isolated from animals because __________________.

  1. Insulin expressed in bacterial cells are low molecular weight.

  2. Insulin from other animals are not pure

  3. Genetically engineered insulin will not elicit immune response in human body.

  4. Genetically engineered insulin is easily transported through blood stream.


Correct Option: C
Explanation:

Answer is option C i.e. "Genetically engineered insulin will not elicit immune response in human body"

Insulin from animal source causes patients to develop allergy or other types of reactions. Insulin produced using rDNA techniques is directly assembled into mature form and hence are more safe.
Genetically engineered insulin do not induce unwanted immunological responses and also do not elicit an immune response in the human body.

Consider the following.
a. Insulin
b. Human Growth hormone
c. Interferons
d. Hepatitis-B surface antigen
Which of the above of/are generated from genetically engineered microbes?

  1. $1$ only

  2. $1, 2$ and $3$ only

  3. $3$ and $4$ only

  4. $1, 2, 3$ and $4$


Correct Option: A

Which was the first protein hormone ever to be synthesized?

  1. Oxytocin

  2. Glucagon

  3. Insulin

  4. Testosterone


Correct Option: C
Explanation:

The first protein to be sequenced was insulin, by Frederick Sanger, in 1949. 

So, the correct option is 'Insulin'.

Transgenic plants are developed by

  1. clone and genetically modified genes

  2. introduction of foreign genes

  3. genetic engineering

  4. purified genes


Correct Option: B

Bacillus thuringiensis (Bt) strains have been used for designing novel

  1. bio-fertilizers

  2. bio-metallurgical techniques

  3. bio-mineralization processes

  4. bio-insecticidal plants


Correct Option: D

Which of the following is not a correct statement?

  1. "Bt" in "Bt-cotton" indicates that it is a genetically modified organism produced through biotechnology

  2. Somatic hybridization involves fusion of two complete plant cells carrying desired genes

  3. The anti-coagulant hirudin is being produced from transgenic Brassica napus seed

  4. "Flavr Savr" variety of tomato has enhanced the Production of ethylene which improves its taste


Correct Option: A,B,D