12th Grade > Biology
BIOTECHNOLOGY AND ITS APPLICATIONS MCQs
Total Questions : 63
| Page 4 of 7 pages
Answer: Option C. -> Alkaline pH of gut
:
C
Bt cotton is produced by introducing an endotoxin producing gene from B. thuringiensis. Once Bt cotton grows, it starts producing these toxins. This toxin enters the bollworm when they feed on cotton leaves. Upon reaching the alkaline environment of the insect’s midgut the toxin is activated and binds to specific receptors present on the lining cells. This causes autodigestion and creates holes in the midgut region leading to the death of the insect.
:
C
Bt cotton is produced by introducing an endotoxin producing gene from B. thuringiensis. Once Bt cotton grows, it starts producing these toxins. This toxin enters the bollworm when they feed on cotton leaves. Upon reaching the alkaline environment of the insect’s midgut the toxin is activated and binds to specific receptors present on the lining cells. This causes autodigestion and creates holes in the midgut region leading to the death of the insect.
Answer: Option D. -> It amplifies the genetic material
:
D
AIDS can be detected by PCR (polymerase chain reaction) at early stages as it amplifies the genetic material millions of times. Thus the presence of even a tiny number of viruses can give a positive result to the diagnostic test.
:
D
AIDS can be detected by PCR (polymerase chain reaction) at early stages as it amplifies the genetic material millions of times. Thus the presence of even a tiny number of viruses can give a positive result to the diagnostic test.
Answer: Option D. -> all of the above
:
D
Few techniques and technologies were needed to improve the output of food crops to meet the ever growing demand of the human population. The three options that have been used for increasing food production are (i) agro-chemical based agriculture (ii) organic agriculture; and (iii) genetically engineered crop-based agriculture.
:
D
Few techniques and technologies were needed to improve the output of food crops to meet the ever growing demand of the human population. The three options that have been used for increasing food production are (i) agro-chemical based agriculture (ii) organic agriculture; and (iii) genetically engineered crop-based agriculture.
Answer: Option B. -> Dr. MS Swaminathan
:
B
Dr. MS Swaminathan is known as the ‘Indian Father of Green Revolution’ for his leadership and success in introducing and further developing high-yielding varieties of food grains in India. The extensive work done by him and his team in this field helped India become self-sufficient in the production of food grains, especially Wheat.
:
B
Dr. MS Swaminathan is known as the ‘Indian Father of Green Revolution’ for his leadership and success in introducing and further developing high-yielding varieties of food grains in India. The extensive work done by him and his team in this field helped India become self-sufficient in the production of food grains, especially Wheat.
Answer: Option A. -> True
:
A
A Japanese company called Hayashibara made bioplastic by using simple sugar derived from the fungus Pullularia pullulans. They constructed a polysaccharide called ‘pullulan’ which possessed the physical properties of plastic but was also biodegradable as it was made of only sugars.
:
A
A Japanese company called Hayashibara made bioplastic by using simple sugar derived from the fungus Pullularia pullulans. They constructed a polysaccharide called ‘pullulan’ which possessed the physical properties of plastic but was also biodegradable as it was made of only sugars.
Answer: Option A. -> Finn dorset ewe and Scottish blackface ewe
:
A
Dolly was cloned using the process of nuclear transfer. Threefemale sheep were used to produce the clone.The udder cell from a finn Dorset was taken. This is a somatic cell. The nucleus was removed and then inserted into an enucleated egg cell from a scottish blackface ewe. This zygote was allowed to develop into an embryo and then introduced into theuterus of another scottish blackface ewe. Even though the enucleated egg cell and the surrogate mother both were blackface ewes the offspring dolly was born as a Finn Dorset.
:
A
Dolly was cloned using the process of nuclear transfer. Threefemale sheep were used to produce the clone.The udder cell from a finn Dorset was taken. This is a somatic cell. The nucleus was removed and then inserted into an enucleated egg cell from a scottish blackface ewe. This zygote was allowed to develop into an embryo and then introduced into theuterus of another scottish blackface ewe. Even though the enucleated egg cell and the surrogate mother both were blackface ewes the offspring dolly was born as a Finn Dorset.
Answer: Option D. -> all of the above
:
D
Few techniques and technologies were needed to improve the output of food crops to meet the ever growing demand of the human population. The three options that have been used for increasing food production are (i) agro-chemical based agriculture (ii) organic agriculture; and (iii) genetically engineered crop-based agriculture.
:
D
Few techniques and technologies were needed to improve the output of food crops to meet the ever growing demand of the human population. The three options that have been used for increasing food production are (i) agro-chemical based agriculture (ii) organic agriculture; and (iii) genetically engineered crop-based agriculture.
Answer: Option C. -> Only i, iii and iv
:
C
Useful biological products are obtained from transgenic animals to treat diseases like Emphysema, Cystic fibrosis and Phenylketonuria. The treatment of AIDS is the use of antivirals that are not obtained from transgenic animals.
:
C
Useful biological products are obtained from transgenic animals to treat diseases like Emphysema, Cystic fibrosis and Phenylketonuria. The treatment of AIDS is the use of antivirals that are not obtained from transgenic animals.
Answer: Option D. -> It amplifies the genetic material
:
D
AIDS can be detected by PCR (polymerase chain reaction) at early stages as it amplifies the genetic material millions of times. Thus the presence of even a tiny number of viruses can give a positive result to the diagnostic test.
:
D
AIDS can be detected by PCR (polymerase chain reaction) at early stages as it amplifies the genetic material millions of times. Thus the presence of even a tiny number of viruses can give a positive result to the diagnostic test.
Answer: Option B. -> Getting insulin assembled into its mature form
:
B
The main challenge for production of insulin using rDNA technique was getting insulin assembled into its mature form. The primitive form of insulin called proinsulin contains the C peptide which is not a part of mature insulin. Therefore the scientists had to make the mature insulin using reverse transcriptase and the mature mRNA of the insulin gene. This method is known as cDNA technology, where complimentary DNA sequene of the mRNA is made and inserted as a gene of interest into the bacteria.
:
B
The main challenge for production of insulin using rDNA technique was getting insulin assembled into its mature form. The primitive form of insulin called proinsulin contains the C peptide which is not a part of mature insulin. Therefore the scientists had to make the mature insulin using reverse transcriptase and the mature mRNA of the insulin gene. This method is known as cDNA technology, where complimentary DNA sequene of the mRNA is made and inserted as a gene of interest into the bacteria.
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