The most common infectious disease is a common cold which is a viral infection that is characterized by varying symptoms like stuffy nose to coughing and a fever. This disease basically attacks the mucous membranes of the nose and throat but can attack the entire respiratory system. Usually this is a self limited disease.
What I know is that amino acid has side chain, amine groupe ,and groupe of carboxyl so what make them difference is side group where the is 20 different R-group which give each individual characteristics
A. changes in the Moon's visibility
Answer:
Thymine
Explanation:
Uracil is the nitrogenous base present only in RNA, but not in DNA. ... DNA have thymine, guanine, adenine and cytosine. Thymine is replaced by uracil in RNA.
I think it’s number 4, I might be wrong.
