Question Bank Directory

Taylor conducted the experiments to prove semi-conservative mode of chromosome replication on:

Match List I with List II: List I A. Histones B. Nucleosome C. Euchromatin D. Heterochromatin List II I. Loosely packed chromatin II. Densely packed chromatin III. Positively charged basic proteins IV. DNA wrapped around histone octamer

Anticodon occurs in:

Progesterone alone or in combination with estrogen can also be used as contraceptives by females as injections or implants under their skin. When used in this manner, they:

Which one of the following also acts as a catalyst in a bacterial cell?

Which of the following statements regarding post-transcriptional events in an eukaryotic cell is INCORRECT?

Which of the following rRNA acts as structural RNA as well as ribozyme in bacteria?

The length of the DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?

Jacob and Monod studied lactose metabolism in E. Coli and proposed the Operon concept. The Operon concept is applicable to:

A transcription unit in DNA is defined primarily by the three regions in DNA and these are with respect to upstream and downstream end:

All of the following are part of an operon except:

In the lac operon, the i gene codes for:

In the DNA molecule:

Antiparallel strands of a DNA molecule mean that:

Given below are two statements: Statement I: RNA being unstable, it mutates at a faster rate. Statement II: RNA can directly code for synthesis of proteins hence can easily express the characters. In the light of the above statements, choose the correct answer from the options given below:

Who proposed that the genetic code for amino acids should be made up of three nucleotides?

Select the correct match:

Analogous structures are results of?

Types of RNA polymerase required in the nucleus for RNA synthesis:

For the second-period elements, the correct increasing order of first ionisation enthalpy is: