CBSE Class XII - NCERT Biology VBQS
BIOTECHNOLOGY and its Applications
(Biology CBSE NCERT Solution - Value Based Questions)
1. For the effective treatment of a disease,
early diagnosis and understanding of pathophysiology is very important. The
conventional methods of diagnosis have been replaced by the most advanced
molecular diagnosis techniques.
A. What are the conventional methods of diagnosis?
B. What is the main drawback of the conventional method?
C. What are the advanced molecular methods?
D. What is the basis of ELISABETH test?
2. In nature, during evolution, every organism
developed some adaptive structure to protect itself from its pathogen /
predators. In majority of eukaryotic cells, there is formation of double
stranded RNA, as both the stands of DNA transcribe complementary ds RNA which
binds to a specific mRNA, thus preventing the expression of a gene.
A. What is the process of gene expression?
B. What is the source of this complementary ds RNA?
C. What is the application of this process?
D. How does a nematode Meloidegyne incognita cause damage to
tobacco plant?
E. How the parasite cannot survive and reproduce on the
genetically modified tobacco plants?
3. Now-a-days, the market is full of genetically
modified plants such as Bt Cotton, Bt Corn, Rice, Potato, Soya bean, Flavr Savr
tomata (having prolonged shelf life).
A.
What does Bt signify
in Bt cotton?
B.
How many types are
the cry genes? Name the cry genes of Bt cotton.
C.
Cry genes express to form
endotoxic cry proteins. Why does not the bacteria itself killed by the cry
proteins?
D.
How larvae of certain
insects feeding on tender parts of shoots, floral buds, and bolls get killed by
taking cry proteins? Explain.
4. Gene therapy is most recent and advanced
therapeutic treatment of defective gene that has been diagnosed in a
child/embryo. It involves insertion of normal healthy and functional gene into
a person's cells and tissues to treat the disease and at the same time
silencing the defective gene of individual. Correction of ADA deficiency is the
example of gene therapy.
A. Expand the term ADA.
B. What is the role of enzyme in the body?
C. What is the cause of disorder?
D. Name the different methods other than gene therapy used
to cure the disease.
E. What is the permanent cure and which are the ideal cells
for this treatment?
CBSE Class 12 Study Materials of your INTEREST
# CBSE Class 12
Biology - NCERT Solutions, CBSE Notes, and CBSE Guide (All Chapters)
# Class 12, NCERT
Solutions, plus CBSE Guide for main subjects (Important for CBSE Class
XII Board Examinations; also helpful for Engineering and Medical Admission
Tests)
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