2025 BIO 207 Rourke Exam 1 EXAM
QUESTIONS AND ANSWERS 100%
SOLVED
Electronegativity - Correct Answers ✅attracts/wants a lot of electrons (ex. h20; O2's electronegativity leads to an unequal sharing of electrons between hydrogen and oxygen; aka it's a polar molecule) Hydrogen Bonds - Correct Answers ✅Very weak, but if you have enough of them. they can be significant (ex. a lot of water molecules can lead up to surface tension) Ionic Bonds - Correct Answers ✅When electrons from 1 atom are TRANSFERRED to another (ex. NaCl, Na loses an e-, now it is positively charged, and Cl accepts the e-, so it becomes neg. charged) Isomers - Correct Answers ✅Same molecular formula but
DIFFERENT structure (3 types):
- structual isomers- differ in covalent arrangement of atoms
- Geometric Isomers- basically arranged identically, atoms
- Stereoisomers- molecules are mirror images of each other
arranged differently
Functional Groups - Correct Answers ✅OH = alcohol N= amine P = Phosphate S = Thiol 1 / 2
2025 BIO 207 Rourke Exam 1 EXAM
QUESTIONS AND ANSWERS 100%
SOLVED
Carbohydrates - Correct Answers ✅Trioses (3 carbons):
glyceraldehyde
Pentoses (5 carbons): ribose and deoxyribose (in DNA and
RNA)
Hexoses (6 carbons): glucose, fructose, and galactose; the
only sugar that can be absorbed by the body Polar/hydrophilic, freely soluble in blood plasma(water).Glycosidic Linkage - Correct Answers ✅Take a H20 out and the sugar molecules band (this is aka a dehydration synthesis/condensation). This is how disaccharides are formed Hydrolysis - Correct Answers ✅Add water to break sugars apart Nonessential amino acids vs essential Amino acids - Correct Answers ✅we can make nonessential; we need to eat essential amino acids Glycine (Gly) - Correct Answers ✅SIMPLEST possible amino acid because it has only one hydrogen as functional group
- / 2