Sickle cell anemia is a classic example of which type of mutation?
Sickle cell anemia results from a point mutation (change of a single base pair) in the beta-globin gene, changing GAG to GUG.
Question 562 of 668
📘 CLASS XII
Insertion or deletion of three or multiples of three bases results in?
Insertion or deletion of one or two bases causes frameshift, but insertion/deletion of three bases (or multiples of three) adds or removes whole amino acids without changing the reading frame of the rest.
Question 563 of 668
📘 CLASS XII
The secondary structure of tRNA is depicted as?
The 2D (secondary) structure of tRNA resembles a clover-leaf, while the 3D structure looks like an inverted L.
Question 564 of 668
📘 CLASS XII
Which arm of tRNA binds to the amino acid?
The amino acid attaches to the 3-prime end (Acceptor arm) of the tRNA molecule.
Question 565 of 668
📘 CLASS XII
The process of activation of amino acids and their attachment to tRNA is called?
Charging or aminoacylation of tRNA is the process where amino acids are activated by ATP and linked to their cognate tRNA.
Question 566 of 668
📘 CLASS XII
Which rRNA acts as a ribozyme for peptide bond formation in bacteria?
In prokaryotes, the 23S rRNA component of the large ribosomal subunit acts as the enzyme (ribozyme) Peptidyl Transferase to form peptide bonds.
Question 567 of 668
📘 CLASS XII
In the Lac Operon, the gene "z" codes for?
The lacZ gene codes for Beta-galactosidase, which hydrolyzes lactose into glucose and galactose.
Question 568 of 668
📘 CLASS XII
The repressor protein of the Lac Operon is synthesized by which gene?
The "i" gene (inhibitor gene) codes for the repressor protein of the Lac Operon.
Question 569 of 668
📘 CLASS XII
Lactose acts as an inducer by binding to the?
Lactose (or allolactose) binds to the repressor protein, causing a conformational change that prevents the repressor from binding to the operator, thus inducing the operon.
Question 570 of 668
📘 CLASS XII
The Human Genome Project was coordinated by?
The HGP was a mega project coordinated by the U.S. Department of Energy and the National Institutes of Health (NIH).
