BIO 3111

BIO 311C - SATA - EXAM 1 Questions AND Correct Answers

A solution with a pH of 4 has ____ x more [H+] that one with a pH of 6 - ✔✔ 100



adhesiveness - ✔✔ water can adhere to surfaces



- important for the attachment of water ( adsorption ), which leads to absorption



alpha linkage - ✔✔ if the -OH group is below the plane of sugars



amino group - ✔✔



amino group - ✔✔ can act as a base by accepting protons

(-NH2 + H+ = -NH3+)



amino group - ✔✔ found in all amino acids, proteins, and some specific nucleotides



As pH increases - ✔✔ [H+] decreases

[OH-] increases

becomes more basic



beta linkage - ✔✔ if the -OH group is above the plane of sugars



Biological example of Covalent bonds - ✔✔ Carbohydrates - glycosidic bonds

Lipids - ester bonds

Proteins - peptide bonds

DNA/RNA - phosphodiester bonds



Biological example of H-bonds - ✔✔ H2O, NH3

, DNA

RNA

Proteins



Biological example of Hydrophilic/Hydrophobic interactions - ✔✔ Phospholipids in biological
membranes have a hydrophilic region outside the membrane bilayer, hydrophobic region within

Amino acids with hydrophobic side chains are in the interior of the protein while those with
hydrophilic side chains can be in the interior or the exterior



Biological example of Ionic bonds - ✔✔ NaCl



Biological example of Van der Waals interactions - ✔✔ Lipids in biological membranes

Cellulose in plant walls



buffer - ✔✔ weak acid/base/both substance that minimizes pHchange by donating or accepting
protons



callose - ✔✔ B-1,3 linked glucose molecules

formed at wounding sites in plants



Carbohydrate monomers - ✔✔ monosaccharides



Carbon skeleton size variation - ✔✔ 3 to 7 carbons



carbonyl - ✔✔



carbonyl - ✔✔ present in simple sugars, some proteins and nucleotides



carbonyl - ✔✔ slightly polar