Download Biochemistry Recitation 1 Key

AP BIOLOGY
BIOCHEMISTRY
RECITATION #1
NAME __________________
DATE __________ HR_____
Questions:
1. Complete the following table:
POLYMER
MONOMER
FUNCTIONS
Carbohydrate
monosaccharides
energy, raw materials, energy
storage, structural compounds
Lipid
glycerol, fatty acids, (steroids)
energy storage, membranes,
steroids, hormones
Protein
amino acids
enzymes, transport, movement,
receptors, defense, structures
Nucleic Acid
nucelotides
heredity, code for amino acid
sequence
2. Draw the amino acids alanine (R group--- CH3) and serine (R group--- CH2OH) and
then show how a dehydration reaction will from a peptide bond between them.
OH
CH3
H
N
H
C
O
H
alanine
CH2
H
C
N
OH
H
OH
C
H
O
H
C
N
OH
H
CH3 O
H
CH2
C
N
C
C
H
H
O
C
OH
serine
Which of the amino acids in question #2 has a polar R group?
__serine___
3. Which of the amino acids in question #2 has a nonpolar R group?
__alanine__
4. In the following diagram of a portion of a polypeptide, label the types of interactions
that are shown.
a. ______ hydrogen bond____
b. __hydrophobic interaction__
c. ______disulfide bridge_____
d. ______ ionic bond_________
Biochemistry Recitation #1 page 1
5. What level of structure do the interactions in #5 produce?
__ tertiary__
6. Show the flow of genetic information in a cell.
__ DNA_____ ___ RNA___ __ protein____
7. Use the following diagram to complete the directions/questions below:
phosphate
base
A. Label the three parts of this nucleotide.
B. Is this a purine or a pyrimidine? _pyrimidine_
C. Is this DNA or RNA?
__ DNA____
sugar
amino acid
8. Identify the monomer or groups shown in each of
the following:
9. Match the monomer/groups in #9 with the
descriptions below. Answers may be used more
than once.
a) combine to form a fat
__ b,d____
b) combine via a peptide bond
__ a______
c) combine to form a nucleotide
__ c, e, f___
d) carbohydrates
__ d, f, g___
e) purine
__ c______
f) protein
__ a______
fatty acid
base
glycerol
(carb)
phosphate
ribose
(carb)
carbohydrate
(triose)
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10. Match the molecule with its class of macromolecule.
A. carbohydrate
B. lipid
C. protein
D. nucleic acid
__ a___ glycogen
_ _d____ gene
__ b___ cholesterol
__ b___ triglycerol
__ d___ RNA
__ c___ enzyme
__c__
collagen
__ c___ hemoglobin
Multiple Choice
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__ a___ cellulose
__ a___ chitin
Number 4 was yucky, so it’s not included here!
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