Bios 1700—Tanda
SI session 9/4/14 — Ch. 2
1. Fill out the following table using the phrases below it. (One box will have two
entries.)
Monomer
simple sugar
RNA
nucleotide
peptide
Polymer
DNA
protein
glycosidic
amino acid
Bond type
phosphodiester
carbohydrate
2. In biology, molecules will generally be classified as
a. Aquaphilic or aquaphobic
b. Hydratic or nonhydratic (ahydratic)
c. Hydrophilic or hydrophobic
d. Aqueous or nonaqueous
3. You are running litmus tests on the stomach contents of Antarctic fish. The
average pH of the results is 2.7. You would describe this as
a. Basic, or, with a large concentration of H+ (protons)
b. Basic, or, with a small concentration of H+ (protons
c. Acidic, or, with a large concentration of H+ (protons)
d. Acidic, or, with a small concentration of H+ (protons)
4. Label the hydrophilic & hydrophobic regions on the phospholipid to the
left.
5. Diagram the structure that phospholipids form in water. What is this
structure called? Where would you find it?
6. H2O is released during which of the following? (check all that apply)
a. Glycosidic bonding
b. Formation of a triglyceride molecule
c. Bonding between two strands of DNA
d. Phosphodiester bonding
e. Formation of a phospholipid bilayer
7. What do all elements in a COLUMN on the periodic table have in common?
a. Number of neutrons in the nucleus
b. Number of electrons in the outer shell
c. Number of protons in the nucleus
8. You have discovered a form of hydrogen that is slightly MORE
electronegative than natural hydrogen. This atom will still bind with oxygen,
but the resultant water
a. Does not form droplets (or have the same surface tension) as ‘normal’
water
b. Is electrically charged
c. Is solid
9. What kind of bond would hydrogen and oxygen form if hydrogen were LESS
electronegative?
a. Ionic
b. Covalent
c. Hydrogen
d. Glycosidic
10. Which of the following DNA sequences is more stable?
a. AATACTGAGCTTTAAGTACAATAGCCATGCATTT
TTATGACTCGAAATTCATGTTATCGGTACGTAAA
b. GGTACTGTCGTGAGTGTCCCCGATCGTACGATCG
CCATGACAGCACTCACAGGGGCTAGCATGCTAGC
11. Which of the following lipids would form a more stable triglyceride?
a)
b)