Proteins are composed of polypeptides which are in turn composed of amino acids which are organic molecules and are composed of:
Carbon
Hydrogen
Oxygen
Nitrogen
And a variable group (Can be a carbon, hydrogen, or sometimes a sulfur)
All amino acids share a common structure, where an amino group is bonded to a carbon atom (designated the alpha carbon) which is in turn bonded to carboxylate (carboxyllic acid), a hydrogen and the variable group often denoted as the R group (except glycine which has a H for an R group). Amino acids combine through a dehydration mechanism which removes a hydroxyl group from the carboxyllic acid of one amino acid and the proton from another amino acid's amino group: the resultant bond is referred to as a peptide bond and is very stable and rigid (planar) due to delocalisation of the double bond of the carbonyl over to the N atom
Protein is an organic compound composed of carbon, hydrogen, oxygen, and nitrogen
Nitrogen
amino acids
True.
Amino Acids
Ribosomes are composed mainly of protein and RNA.
thick filaments
simple protein and non protein substance.
Most enzymes are protein, but not all protein are enzymes.
Viruses are an infectious agent composed of a simple strand of RNA with no protein component.
Ribosomes are composed mainly of protein and RNA.
Ribosomes are composed of protein and RNA.
Fingernails and hair (and claws, hooves and horns on animals) is composed of a protein called "Keratin".
thick filaments
protein
simple protein and non protein substance.
Ribosome.
Ribosomes
Amino acids
A protein.
Protein