DNA is composed of repeating units of
ribonucleosides
deoxyribonucleosides
ribonucleotides
deoxyribonucleotides
Which is not consistent with double helical structure of DNA ?
Density of DNA decreases on heating
A + T/C + G is not constant
Both (a) and (b)
Cytochrome is
metallo flavoprotein
Fe containing porphyrin pigment
glycoprotein
lipid
Living cell contains 60-75% water. Water present in human body is
60-65%
50-55%
75-80%
65-70%
A nucleotide is formed of
purine, pyrimidine and phosphate
purine, sugar and phosphate
nitorgen base, sugar and phosphate
pyrimidine, sugar and phosphate
The nitrogenous organic base purine occuring in RNA is
cytosine
thymine
guanine
uracil
Protein synthesis in an animal cell takes plae
only in cytoplasm
in the nucleolus as well as in cytoplasm
in cytoplasm as well as in mitochondria
only on ribosomes attached to the nuclear envelope
A polysaccharide, which is synthesized and stored in liver cells, is
lactose
galactose
arabinose
glycogen
Glycogen is a polymer of
glucose
fructose
sucrose
In plants, inulin and pectin are
reserve materials
wastes
excretory material
insect-attracting material