Cry-I endotoxins obtained from Bacillus thringiensis are effective against
mosquitoes
flies
nematodes
nematodes
B.
flies
Insect-resistant transgenic plants contain either a gene from the bacterium Bacillus thuringiensis or some other gene. The cry gene of bacillus thuringiensis produces a protein which forms crystalline inclusion in the bacterial strains. Cry-I endotoxins are effective gains Lepidoptera (eg flies). Cry- V and Cry-VI proteins are effective against are ingested by insects, they are dissolved in the alkaline juices present in the midgut lumen. The gut proteases process them hydrolytically to release the core toxic fragments. The toxic fragments are believed to bind to specific high-affinity receptors present in the brush border of midgut epithelial cells and causing their swelling and eventual lysis.
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.
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
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
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
