Assertion : Histones are basic proteins of major importance in packaging of eukaryotic $DNA$. $DNA$ and histones comprise chromatin forming the bulk of eukaryotic chromosome.
Reason : Histones are of five major types $H_1,\,H_2A\,, H_2B,H_3$ and $H_4$ .
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
If the Assertion is correct but Reason is incorrect.
If both the Assertion and Reason are incorrect.
Histones are rich in the basic amino acid ...............and........
Nucleic acids exhibit secondary structure. Describe through Watson-Crick model.
Distinguish between heterochromatin and euchromatin. Which of the two is transcription-ally active ?
If the sequence of one strand of $DNA$ is $5^{\prime}$ $A T G C A T C G 3'$ , find the sequence of complementary strand in $5^{\prime} \rightarrow 3^{'}$ direction
Explain the role of scientist :
$1.$ Watson and Crick $(1953)$
$2.$ Erwin chargaff