Download App

STD 12 - 10. biotechnology and its application — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 10. biotechnology and its application1 Mark
MCQ
What is antisense technology ?
  • ✓
    When a piece of $RNA$ that is complementary in sequence is used to stop expression of a specific gene
  • B
    $RNA $ polymerase producing $DNA$
  • C
    A cell displaying a foreign antigen used for synthesis of antigens
  • D
    Production of somaclonal variants in tissue cultures
✓

Answer

Correct option: A.
When a piece of $RNA$ that is complementary in sequence is used to stop expression of a specific gene
a
(a) : Many nematodes live in plants and animals including human beings. A nematode Meloidogyne incognita infests the roots of tobacco plants and causes a great reduction in yield. A novel strategy was adopted to prevent this infection that was based on the process of $RNA$ interference $(RNAi)$. $RNA$ interference $(RNAi)$ is the phenomenon of inhibiting activity of a gene by synthesis of $RNA$ molecules complementary to the $mRNA$. The normal (in vivo synthesized) $mRNA$ of a gene is said to be “sense” because it carries the codons that are “read” during translation. Normally, the complement to the $mRNA$  “sense” strand will not contain a sequence of codons that can be translated to produce a functional protein; thus, this complementary strand is called “anti­sense $RNA$ ”. The anti­sense $RNA$ and $mRNA$ molecules will anneal to form duplex $RNA$ molecules (or double stranded $RNA$) and the duplex $RNA$ molecules can not be translated. Thus, the presence of anti­sense $RNA$ will block translation of the $mRNA$ of the affected gene. In fact, recent evidence indicates that these $RNA$ duplexes are often rapidly degraded in vivo.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from STD 12 - 10. biotechnology and its application→STD 12 - 10. biotechnology and its application — all question types→Biology STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Acquired Immunity mediated by which of the following
→
The annual net primary productivity of the whole biosphere is approximately...
→
Most of the invertebrates and plant populations have:
→
Hemophilia, a human disease, is caused by:
→
Which of the following is incorrect regarding vasectomy?
→
What is the percentage of photosynthetically active radiation $\text{(PAR)},$ in the incident solar radiation.
→
Biotic potential refers to
→
First antibiotic isolated was
→
Following statements describe the characteristics of the enzyme Restriction endonuclease. Identify the Incorrect statement.
→
How many countries pledged their commitment to achieve by $2010$, a significant reduction in the current rate of biodiversity loss at global, regional and local levels in the World Summit held in $2002$?
→