Lactose is composed of
glucose + glucose
glucose + fructose
fructose + galactose
Neither heterochromatin nor euchromatin but only the nucleolus
Which is an essential amino acid ?
Serine
Aspartic acid
Glycine
Phenylalanine
Most abundant organic compound on earth is
protein
cellulose
lipids
steroids
The four elements making 99% of living system are
CHOS
CHOP
CHON
CNOP
The nitrogenous organic base purine occuring in RNA is
cytosine
thymine
guanine
uracil
The major portion of the dry weight of plants comprises of
carbon, nitrogen and hydrogen
carbon, hydrogen and oxygen
nitrogen, phosphorous and potassium
calcium, magnesium and sulphur
Which one of the following is the correct matching of three items and their grouping category ?
Malleus, incus, cochlea - Ear ossicles
Ilium, ischium, pubis - Coxal bones of pelvic girdle
Actin, myosin, rhodopsin - Muscle proteins
Cytosine, uracil, thiamine - Pyrimidines
Lipids are insoluble in water because lipid molecules are
hydrophilic
hydrophobic
neutral
Zwitter ions
The most abundant elements present in plants is
carbon
nitrogen
manganese
iron
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 reactions.
