Molecular basis of inheritance

Assertion : Adenine cannot pair with cytosine.

Reason : Adenine and Cytosine do not have a perfect match between hydrogen donor and hydrogen acceptor sites. Hence they cannot pair.

A - If both A and R are true and R is the correct explanation of A.

B -If both A and R are true but R is not the correct explanation of A.

C - If A is true but R is false. D - If both A and R are false.

• A

• B

• C

• D

The LAC OPERON consists of _________

• 4 regulatory genes only

• 1 regulatory and 3 structural genes

• 2 regulatory genes and 2 structural genes

• 3 regulatory genes and 3 structural genes

In history of biology, HGP led to the development of _____

• biotechnology

• biomonitoring

• biosystematics

• bioinfomatics

The DNA strand that codes for protein is known as the _____

• exons

• introns

• control regions

• intervening sequences

Which is the last human chromosome to be completely sequenced?

• chromosome Y

• chromosome X

• chromosome 1

• chromosome 21

To initiate the translation the mRNA first binds to ________

• smaller ribosome

• larger ribosome

• whole ribosome

• no such specificity exists

During replication of DNA okazaki fragments are formed in the direction of _____

• 3'--->5'

• 5'--->3'

• 5'--->5'

• 3'--->3'

How many codons code for amino acids?

• 60

• 61

• 63

• 64

One codon codes for only one amino acid, the genetic code is

Mention the anticodon sequence of bases for AUG

• TAC

• UAC