Uridine, present only in RNA is a

Solution

The combination of pentose sugar with nitrogenous bases(purines or pyrimidines)is called nucleoside. Examples are adenosine, guanosine, cytidine, thymidine and uridine.

Which enzymes will be produced in a cell in which there is a nonsense mutation in the lac Y gene?

Solution

A nonsense mutation is the one which stops polypeptide synthesis due to formation of a terminating or non sense codon. e.g. ATT(UAA), ATC (UAG), ACT(UGA) .The lactose or lac operon of Esherichia coli contains structural genes (Z, Y, A) . If Y codes for termination of polypeptide chain then only the product of ‘Z’ gence teranscribe to form β galactosidase.

The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C.

Solution

In this question A is transcription, B - translation C-Francis Crick (central dogma) It is unidirectional flow of information DNA to mRNA (transcription) and then decoding the information present in mRNA in the for-mation of polypeptide chain or protein (translation).

Supercoiled DNA occurs in

Variable part of DNA molecule is

5′ end of a polynucleotide contains

Methyl guanosine triphosphate is added at 5′ end of hn RNA in a process of

For transformation, micro-particles coated with DNA to be bombarded with gene gun are made up of :

Solution

For gene transfer into the host cell without using vector microparticles made of tungsten and gold coated with foregin DNA are bombarded into target cells at a very high velocity.

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

Which one of the following does not follow the central dogma of molecular biology?

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