The nitrogenous organic base purine occurring in RNA is
cytosine
thymine
guanine
uracil
Collagen is
fibrous protein
globular protein
lipid
carbohydrate
Two free ribonucleotide units are interlinked with
peptide bond
covalent bond
hydrogen bond
phosphodiester bond
Nucleotides are building blocks of nucleic acids.Each nucleotide is a composite molecule formed by
base-sugar-phosphate
base-sugar-OH
(base-sugar-phosphate)
sugar-phosphate
A polysaccharide,which is synthesized and stored in liver cells,is
lactose
galactose
arabinose
glycogen
RNA does not possess
adenine
Sequence of which of the following is used to know the phylogeny?
mRNA
rRNA
tRNA
DNA
Protein synthesis in an animal cell takes place
only in the cytoplasm
in the nucleolus as well as in cytoplasm
in cytoplasm as well as in mitochondria
only on ribosomes attached to the nuclear envelope.
The two polynucleotide chains in DNA are
parallel
discontinuous
antiparallel
semiconservative
Mitotic spindle is mainly composed of` which proteins?
Actin
Myosin
Actomyosin
Myoglobin
