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
Mineral associated with cytochrome is ________________.
Cu
Mg
Fe and Mg
Fe and Cu
Which is wrong about nucleic acids?
DNA is single stranded in some viruses
RNA is single stranded occasionally
Length of one helix is 45 Å in B -DNA
One turn of Z - DNA has 12 bases
Which is not consistent with double helical structure of DNA?
A = T, C ≡ G
Denisty of DNA decreases on heating
A + T/C + G IS NOT CONSTANT
Both (a) and (b)
In which one of the following groups, all the three are example of polysaccharides?
starch, glycogen, cellulose
sucrose, maltose, glucose
glucose, fructose, lactose
Galactose, starch, sucrose
Amino acids are produced from _________________.
proteins
fatty acids
essential oils
α - keto acids
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_______________.
steriods
prostaglandins
glycoproteins
lipoproteins
The basic unit of nucleic acid is ______________.
purine, pyrimidine and phosphate
purine, sugar and phosphate
nitrogen base, sugar and phosphate
pyrimidine, sugar and phosphate
Adenine is ________________.
purine
pyrimidine
nucleoside
nucleotide
