Which amino acids are present in histones
Lysine and histidine
Valine and Histidine
Arginine and lysine
Arginine and histidine
Assertion : In a $DNA$ molecule, $A-T$ rich parts melt before $G-C$ rich parts.
Reason : In between $A$ and $T$ there are three $H-$ bond, whereas in between $G$ and $C$ there are two $H-$ bonds.
What background information did Watson and Crick have made available for developing a model of $DNA$ ? What was their contribution ?
The chemical nature of chromosome is as follows
Study the given figure of nucleosome and select the option that correctly identifies the part $A, B$ and $C$ ?
$A\;\;;\;\;B\;\;;\;\;C$
If the length of E. Coli $DNA$ is $1.36 \;mm$, calculate the number of base pairs in E. Coli.