Molecular Biology

How many types of RNA polymerase are present in prokaryotic cells ?

• 1

• 2

• 3

• 4

Who discovered that DNA is the genetic material?

• Griffith

• Avery, MacLeod and McCarty

• Hershey and Chase

• Meselsson and Stahl

The enzyme which joins the okazaki fragments is

• Helicase

• Primase

• DNA ligase

• Topoisomerase

DNA is NOT present in

• Nucleus

• Mitochondria

• Chloroplast

• Ribosomes

Which of the following is NOT a STOP codon ?

• UGG

• UAA

• UAG

• UGA

Which of the following is NOT present in nucleosome core ?

• H2A

• H1

• H3

• H4

Thickness of chomatin in nanometers is

• 2

• 11

• 30

• 700

In Hershey Chase experiment, which isotope was used to label proteins ?

• N15

• S35

• P32

• H3

Genetic material in TMV

• ds DNA

• ss RNA

• ss DNA

• ds RNA

In prokaryotes the chromosome is

• Always single

• Always circular

• Always DNA

• Always contains histones