MCQ
The net electric charge on DNA and histones is:
- ANegative and positive, respectively.
- BBoth negative.
- CBoth positive.
- DZero.
Explanation:
Histones carry positive charge, because they have an abundance of basic proteins arginine and lysine. The negatively charged DNA is wrapped around positively charged histone resulting in a net positive and negative charge.
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Assertion $A$ : Amniocentesis for sex determination is one of the strategies of Reproductive and Child Health Care Programme.
Reason $R$ : Ban on amniocentesis checks increasing menace of female foeticide.
In the light of the above statements, choose the correct answer from the options given below.
$i. \;RNA\; polymerase \;I \;transcribes \;rRNAs$.
$ii. \;RNA \;polymerase \;II \;transcribes \;snRNAs.$
$iii. \;RNA \;polymerase \;III \;transcribes \;hnRNA.$
$iv. \;RNA \;polymerase \;II \;transcribes \;hnRNAs.$