15)
More than one billion of Earth's population of nearly 7.3 billion people lack access to safe drinking water. Over 5 million people
die each year from waterborne illness due to contaminated water supplies. In Bangladesh, a study was performed where women
used their saris, a cloth worn around the head and shoulders, to filter pond and river water. The most likely reduction in infection
occurred for which human health hazard?
A)HIV
B)Zika

C)Cholera
D)West Nile

answer; the above statement is false; ///

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

a time line cause it goes from 685 to 978