Smoking cigarettes causes lung cancer because A. nicotine destroys the membranes of alveoli, the microscopic air sacs. The alveoli expand, and the person cannot completely exhale. B. nicotine is deposited as black, sticky tar in respiratory passages. C. nicotinic receptors in the lungs bind carcinogens in cigarette smoke. D. nicotine binds the A1 allele of the dopamine D(2) receptor. E. nicotine accelerates the cell cycle of lung cells.

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

answer: blah

explanation:

bc blah

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

i won't lie i don't know so go online and ask google thats what i do