A nucleotide is formed of
purine, pyrimidine and phosphate
purine, sugar and phosphate
nitorgen base, sugar and phosphate
pyrimidine, sugar and phosphate
Lactose is composed of
glucose + glucose
glucose + fructose
fructose + galactose
Neither heterochromatin nor euchromatin but only the nucleolus
During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undergraded ?
Hemicellulose
Lipids
Cellulose
Lignin
The nitrogenous organic base purine occuring in RNA is
cytosine
thymine
guanine
uracil
A polysaccharide, which is synthesized and stored in liver cells, is
lactose
galactose
arabinose
glycogen
Length of one turn of the helix in a B-form DNA is approximately
3.4 nm
2 nm
0.34 nm
20 nm
DNA is composed of repeating units of
ribonucleosides
deoxyribonucleosides
ribonucleotides
deoxyribonucleotides
Collagen is
fibrous protein
globular protein
lipid
carbohydrates
Which of the following is the simplest amino acid ?
Alanine
Asparagine
Glycine
Tyrosine
The four elements making 99% of living system are
CHOS
CHOP
CHON
CNOP
