BIOLOGY 2e - EXAM 1 REVIEW QUESTIONS AND THEIR COMPLETE SOLUTIONS

BIOLOGY 2e - EXAM 1 REVIEW
QUESTIONS AND THEIR COMPLETE
SOLUTIONS


Which element is most predominant in the human
body?
a. Hydrogen
b. Nitrogen
c. Water
d. Oxygen
oxygen
Which subatomic particle is positively charged?
a. Electron
b. Proton
c. Neutron
d. Isotope
proton
Water is polar (T/F)
true.
In a Nitrogen-Hydrogen (N-H) covalent bond, nitrogen
is slightly _____________ charged.
a. negatively
b. positively
negatively
Water droplets stick to the leaves of plants because of
_____________.

, a. adhesion
b. cohesion
adhesion
Hydrogen bonds are covalent bonds between
hydrogen and oxygen. (T/F)
false
Sodium (Na) becomes ______________ after ionic
bonding with chloride.
a. positive
b. negative
positive
Look at Figure 2.19. Bleach is _________ and has
more __________ than ____________ ions.
a. Basic, H, OH
b. Basic, OH, H
c. Acidic, H, OH
d. Acidic, OH, H
basic, OH, H
Give the following examples to their macromolecule
category
1. Monosaccharide
2. Steroid
3. DNA
3. Hemoglobin
1. Monosaccharide - Carbohydrate
2. Steroid - Lipid
3. DNA - Nucleic Acid
4. Hemoglobin -Protein
What is water an excellent solvent for?
molecules w/ ionic bonds (salt)
molecules w/ polar covalent bonds (glucose, ethanol)