The basic unit of nucleic acid is
pentose sugar
nucleoid
nucleoside
nucleotide
DNA is composed of repeating units of
ribonucleosides
deoxyribonucleosides
ribonucleotides
deoxyribonucleotides
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
Living cell contains 60-75% water .Water present in human body is
60-65%
50-55%
75-80%
65-70%
Which is an essential amino acid?
Serine
Aspartic acid
Glycine
Phenylalanine
The most abundant element present in plants is
carbon
nitrogen
manganese
iron
Antibodies in our body are complex
steroids
prostaglandins
glycoproteins
lipoproteins
Which is wrong about nucleic acids?
DNA is single stranded in some viruses.
RNA is double stranded occasionally
Length of one helix is 45Å in B-DNA
One turn of Z-DNA has 12 bases
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
Lactose is composed of
glucose+glucose
glucose+fructose
fructose+galactose
glucose+galactose
