The net electric charge on DNA and histones is _______
DNA is negative, Histones are positive.
Question 463 of 668
📘 CLASS XII
The first genetic material could be _______
RNA came first.
Question 464 of 668
📘 CLASS XII
The human chromosome with the highest and least number of genes are _______ and _______ respectively.
Chr 1 has max, Y has min genes.
Question 465 of 668
📘 CLASS XII
Who amongst the following scientists had no contribution in the development of the double helix model for the structure of DNA?
Meselson and Stahl worked on replication, not the structure model itself.
Question 466 of 668
📘 CLASS XII
DNA is a polymer of nucleotides which are linked to each other by 3' to 5' phosphodiester bond. To prevent polymerization of nucleotides, which of the following modifications would you choose?
Polymerization requires a free 3' OH.
Question 467 of 668
📘 CLASS XII
Discontinuous synthesis of DNA occurs in one strand, because _______
The enzyme only works 5' to 3'.
Question 468 of 668
📘 CLASS XII
Which of the following steps in transcription is catalyzed by RNA polymerase?
RNA Pol does all 3, with help from factors for init/term.
Question 469 of 668
📘 CLASS XII
Control of gene expression in prokaryotes takes place at the level of _______
Transcription initiation is the main control point.
Question 470 of 668
📘 CLASS XII
Regulatory proteins are the accessory proteins that interact with RNA polymerase and affect its role in transcription. Which of the following statements is correct about regulatory protein?
Regulatory proteins can activate or repress transcription.
