The basic unit of nucleic acid is
pentose sugar
nucleoid
nucleoside
nucleotide
Sequence of which of the following is used to know the phylogeny?
mRNA
rRNA
tRNA
DNA
Collagen is
fibrous protein
globular protein
lipid
carbohydrate
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
Which is distributed more widely in a cell?
RNA
Chloroplasts
Spherosomes
Which is wrong about nucleic acids?
DNA is single stranded in some viruses.
RNA is double stranded occasionally
Length of one helix is 45Å in B-DNA
One turn of Z-DNA has 12 bases
A polysaccharide,which is synthesized and stored in liver cells,is
lactose
galactose
arabinose
glycogen
The most abundant element present in plants is
carbon
nitrogen
manganese
iron
The major portion of the dry weight of plants comprises of
carbon,nitrogen and hydrogen
carbon,hydrogen,and oxygen
nitrogen,phosphorus and potassium
calcium,magnesium and sulphur.
Cellulose,the most important constituent of plant cell wall is made of
unbranched chain of glucose molecules linked by α 1,4 glycosidic bond
branched chain of glucose molecules linked by β 1,4 glycosidic bond in straight chain and α 1,6 glycosidic bond at the site of branching
unbranched chain of glucose molecules linked by β 1,4 glycosidic bond
branched chain of glucose molecules linked by α 1, 6 glycosidic bond at the site of branching
