Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions for Biology

Following are the features of genetic codes. What does each one indicate?
Stop codon; Unambiguous codon; Degenerate codon; Universal codon.

Describe the process of transcription in bacteria

How do m-RNA, t-RNA and ribosomes help in the process of translation?

Explain the process of transcription in prokaryotes.

(i) Name the scientist who suggested that the genetic code should be made of a combination of three nucleotides.
(ii) Explain the basis on which he arrived at this conclusion.

Name the enzyme responsible for the transcription of tRNA and the amino acid the initiator tRNA gets linked with.

State the aim and describe Messelson and Stahl’s experiment.

Briefly describe the following:

Transcription 

Name the primary lymphoid organs.

The following is well-known abbreviation, which have been used in this chapter. Expand to its full form:

MALT

How is Prokaryotic Transcription process different in eukaryotes?

Explain the processing the hnRNA needs to undergo before becoming functional mRNA eukaryotes.

Explain the role of initiator tRNA in the initiation of protein synthesis.

Initiation codon of protein synthesis in Eukaryotes is ______.

The process of transfer of genetic information from DNA to RNA/formation of RNA from DNA is ______.

Reverse transcriptase is ______.

DNA template sequence of CTGATAGC is transcribed over mRNA as ______.

Which is not involved in protein synthesis?

If the sequence of bases in DNA is ATTCGATG, then the sequence of bases in its transcript will be ______.

The process of copying genetic information from one strand of DNA to RNA is termed as ______.