Alvin is studying a model of the chemical structure of a common nucleic acid. He observes that the nucleic acid consists of four nitrogenous
bases: adenine (A), cytosine (C), guanine (G), and uracil (U).
Alvin's observation most strongly supports which of these conclusions?
A. The nucleic acid is a form of RNA, and is not DNA.
B. The nucleic acid is either mRNA or rRNA, but not tRNA.
C. The nucleic acid is either RNA or DNA.
D. The nucleic acid is DNA, and is not RNA.

answer; i believe the correct answer is (replication is not conservative);

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes

it depends on how much it could carry.

hi my name is ashlynn and im 15

these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.