What is antissense technology?
A cell displaying a foreign antigen used for synthesis of antigens
Production of somaclonal variants in tissue cultures.
When a piece of RNA that is complementary to sequence is used to stop expression of a specific gene.
When a piece of RNA that is complementary to sequence is used to stop expression of a specific gene.
C.
When a piece of RNA that is complementary to sequence is used to stop expression of a specific gene.
The antisense RNA technology simply involves the synthesis of RNA molecules that are complementary to the mRNA molecules produced by transcription of a given gene. Usually t his antisense RNA will not contain the regulatory sequences required for translation but even if does it will not usually specify a functional product. Instead, most antisense RNAs contain multiple termination codons in all three reading frames. However, when antisense RNA molecules are present in the same cytosol with sense (mRNA) molecules of a gene, the antisense RNA and mRNA molecules will anneal to form duplex RNA molecules. These duplex RNA molecules cannot be translated thus, the presence of antisense RNA will block translation of the mRNA of the affected gene.
Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?
Thymine, Uracil - Pyrimidines
Uracil, Cytosine - Pyrimidines
Guanine, Adenine - Purines
Guanine, Adenine - Purines
In the DNA molecule
the total amount of purine nucleotides and pyrimidine nucleotides is not always equal
there are two strands, which run parallel in the 5' →3' direction
the proportion of adenine in relation to thymine varies with organism
the proportion of adenine in relation to thymine varies with organism
Cry-I endotoxins obtained from Bacillus thringiensis are effective against
mosquitoes
flies
nematodes
nematodes
Polymase is formed by
several ribosomes attached to a single mRNA
many ribosomes attached to a strand of endoplasmic reticulum
a ribosome with several subunits
a ribosome with several subunits
