,Chapter 1 Biochemistry: An Evolving Science
Matching Questions
Use the following to answer questions 1-10:
Choose the correct answer from the list below. Not all of the answers will be used.
a) uridine
b) true
c) G
d) thymine
e) H
f) sugar-phosphate units
g) covalent
h) Archaea
i) entropy
j) system
k) 3
l) 2
m) false
1. DNA is made from the building blocks adenine, guanine, cytosine, and ____________.
Ans: d
Section: 1.2
2. The DNA backbone is made from repeating ____________.
Ans: f
Section: 1.2
3. ____________ The number of hydrogen bonds formed between A and T.
Ans: l
Section: 1.2
4. ____________ The number of hydrogen bonds formed between G and C.
Ans: k
Section: 1.2
5. The fundamental groups of organisms include Eukarya, Bacteria, and ____________.
Ans: h
Section: 1.1
, 6. ____________ The strongest bonds in molecules:
Ans: g
Section: 1.3
7. ____________ Hydrogen bonds are usually weaker than covalent bonds (true/false).
Ans: b
Section: 1.3
8. ____________ Matter within a defined region of space.
Ans: j
Section: 1.3
9. ____________ For spontaneous reactions the G must be positive (true/false).
Ans: m
Section: 1.3
10. ____________ Gibbs-free energy.
Ans: c
Section: 1.3
Multiple-Choice Questions
, 11. Which of the following is considered a metabolite,
a substance that is chemically transformed in a
biochemical process?
A) deoxyribonucleic acid
B) glycerol
C) protein
D) ribonucleic acid
E) polysaccharide
Ans: B Section: 1.1
12.
The structure of DNA described by Watson and
Crick included
A) a double helix.
B) the sugar phosphate backbone aligned in the center
of the helix.
C) the base pairs that are stacked on the inside of the
double helix.
D) a and b.
E) a and c.
Ans: E Section: 1.2
13. What did Watson and Crick suggest to be
significant about the base pairing found in the
helix?
A) It allowed the DNA to twist in a helix.
B) The DNA could be circular.
C) It was a mechanism for copying.
D) All of the above.
E) None of the above.
Ans: C Section: 1.3
14. Approximately what percentage of the human genome encodes for proteins?
A) 50%
B) 90%
C) 10%
D) 3%
E) None of the above.
Ans: D Section: 1.4
15. What gives proteins such a dominant role in biochemistry?
A) the rigidity of the peptide backbone
B) the ability to act as a blueprint
C) their ability to self-replicate
D) their ability to spontaneously fold into complex
three-dimensional structures
E) All of the above.
Ans: D Section: 1.4
Matching Questions
Use the following to answer questions 1-10:
Choose the correct answer from the list below. Not all of the answers will be used.
a) uridine
b) true
c) G
d) thymine
e) H
f) sugar-phosphate units
g) covalent
h) Archaea
i) entropy
j) system
k) 3
l) 2
m) false
1. DNA is made from the building blocks adenine, guanine, cytosine, and ____________.
Ans: d
Section: 1.2
2. The DNA backbone is made from repeating ____________.
Ans: f
Section: 1.2
3. ____________ The number of hydrogen bonds formed between A and T.
Ans: l
Section: 1.2
4. ____________ The number of hydrogen bonds formed between G and C.
Ans: k
Section: 1.2
5. The fundamental groups of organisms include Eukarya, Bacteria, and ____________.
Ans: h
Section: 1.1
, 6. ____________ The strongest bonds in molecules:
Ans: g
Section: 1.3
7. ____________ Hydrogen bonds are usually weaker than covalent bonds (true/false).
Ans: b
Section: 1.3
8. ____________ Matter within a defined region of space.
Ans: j
Section: 1.3
9. ____________ For spontaneous reactions the G must be positive (true/false).
Ans: m
Section: 1.3
10. ____________ Gibbs-free energy.
Ans: c
Section: 1.3
Multiple-Choice Questions
, 11. Which of the following is considered a metabolite,
a substance that is chemically transformed in a
biochemical process?
A) deoxyribonucleic acid
B) glycerol
C) protein
D) ribonucleic acid
E) polysaccharide
Ans: B Section: 1.1
12.
The structure of DNA described by Watson and
Crick included
A) a double helix.
B) the sugar phosphate backbone aligned in the center
of the helix.
C) the base pairs that are stacked on the inside of the
double helix.
D) a and b.
E) a and c.
Ans: E Section: 1.2
13. What did Watson and Crick suggest to be
significant about the base pairing found in the
helix?
A) It allowed the DNA to twist in a helix.
B) The DNA could be circular.
C) It was a mechanism for copying.
D) All of the above.
E) None of the above.
Ans: C Section: 1.3
14. Approximately what percentage of the human genome encodes for proteins?
A) 50%
B) 90%
C) 10%
D) 3%
E) None of the above.
Ans: D Section: 1.4
15. What gives proteins such a dominant role in biochemistry?
A) the rigidity of the peptide backbone
B) the ability to act as a blueprint
C) their ability to self-replicate
D) their ability to spontaneously fold into complex
three-dimensional structures
E) All of the above.
Ans: D Section: 1.4
