In double helix of DNA,the two DNA strands are
coiled around a common axis
coiled around each other
coiled differently
coiled over protein sheath
The four elements making 99% of living system are
CHOS
CHOP
CHON
CNOP
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
A nucleotide is formed of
purine,pyrimidine and phosphate
purine,sugar and phosphate
nitrogen base ,sugar and phosphate
pyrimidine,sugar and phosphate
Element necessary for the middle lamella
Ca
Zn
K
Cu
Due to discovery of which of the following in 1980 the evolution was termed as RNA world?
mRNA,tRNA,rRNA synthesize proteins
In some virus RNA is genetic material
RNA have enzymatic property
RNA is not found in all cells
ATP is a
nucleotide
nucleosome
nucleoside
purine
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.
Antiparallel strands of a DNA molecule means that
the phosphate groups of two DNA strands,at their ends,share the same position
the phosphate groups at the start of two DNA strands are in opposite position(pole)
one strand turns clockwise
one strands turns anti-clockwise
