A segment of DNA has 120 adenine and 120 cytosine bases.The total number of nucleotides present in the segment is
120
240
60
480
Which one of the following statements about cytochrome 450 is wrong?
It contains iron
It is a coloured cell
It has an important role in metabolism.
It is an enzyme involved in oxidation reaction.
The basic unit of nucleic acid is
pentose sugar
nucleoid
nucleoside
nucleotide
Nucleotides are building blocks of nucleic acids.Each nucleotide is a composite molecule formed by
base-sugar-phosphate
base-sugar-OH
(base-sugar-phosphate)
sugar-phosphate
The two polynucleotide chains in DNA are
parallel
discontinuous
antiparallel
semiconservative
A polysaccharide,which is synthesized and stored in liver cells,is
lactose
galactose
arabinose
glycogen
Element necessary for the middle lamella
Ca
Zn
K
Cu
Types of RNA polymerase required in nucleus for RNA synthesis
1
2
3
4
Living cell contains 60-75% water .Water present in human body is
60-65%
50-55%
75-80%
65-70%
Antibodies in our body are complex
steroids
prostaglandins
glycoproteins
lipoproteins
