Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Chem II > ch 24 :))))) > Flashcards

ch 24 :))))) Flashcards

(57 cards)

Start Studying
1
Q

A polypeptide is
an addition polymer of amino acids.
a condensation polymer of amino acids.
a polymer of sugar molecules.
a part of nucleic acids.
a polymer of nucleic acids.

A

b

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which of the following is not a lipid?
triglycerides
fatty acids
glycerol
steroids
phospholipids

A

c

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How many rings are found in a steroid molecule?

A

a

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When a drop of the fatty acid oleic acid (CH3(CH2)7CH=CH(CH2)7CO2H) is added to water it forms a molecule thick layer on the surface of the water. What is the likely orientation of the acid on the water surface?

A

?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which of the following statements concerning enzyme chemistry is/are correct?
1. Enzymes are biological catalysts.
2. A reaction occurs when substrate binds the enzyme active site.
3. Enzymes catalyze multiple types of reactions.

A

d

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which statement concerning the twenty different α-amino acids widely found in nature is true?

A

d

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What carbohydrate is the form in which plants store glucose for future use as cellular fuel?

A

a

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The amide linkages in a protein are also called _____ bonds.

A

peptide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

The sequence of amino acids linked by peptide bonds is called the _____ structure of a protein.

A

b

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Classification of a compound as a lipid is based on the _____ of the compound.

A

e

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which of the following concerning protein structure is not correct?

A

c

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which of the following statements concerning proteins is not correct?

A

e

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the most prevalent form of the amino acid glycine (R = H) in an aqueous environment when mixed with an excess of strong acid.

A

c

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which DNA or RNA base is guanine?

A

c

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How many RNA nucleotides comprise a codon?

A

c

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Saturated fats and oils have ___ melting points than unsaturated fats and oils because of greater ___ forces between molecules.

A

b

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The fully protonated form of the amino-acid glycine (R=H) may be simply written as H2Gly+. Write the balanced acid dissociation equilibria (Ka1 and Ka2) for this acid.

A

?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

The principal compound used to store and transport energy in a cell is called adenosine 5’-triphosphate. Is this statement true or false?

A

true

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

In the context of polymerase chain reaction, if you start with a single double-stranded DNA molecule, how many double-strabded DNA molecules will you have after 10 amplification cycles?

A

1,024

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Which of the following is the product of transcription in protein synthesis?

A

d

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

The process by which a double stranded of DNA is copied is called ___. In the process, a ___ strand of DNA is produced from each single strand of the original double-stranded DNA.

A

replication; rna?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Starch and cellulose are polysaccharides made up long chains of glucose linked by glycosidic bonds. Despite the identical composition, why can humans digest starch but not cellulose?

A

Humans can digest starches because they have an alpha linkage. We can’t digest cellulose because it has a beta linkage.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Which of the following functional groups is not found in naturally occurring proteins or their amino acid building blocks?

24
Q

Which of the following base forms hydrogen bonds with adenine in double-stranded DNA molecule?

25
Which of the following statements concerning RNA is/are correct?
d
26
Which of the following statements concerning metabolism is/are correct?
e
27
A fragment of a DNA molecule has the base sequence GACT. Which of the following is the complementary sequence of the DNA fragment?
d
28
Which of the following functional groups are not found in carbohydrates?
a
29
A phospholipid may include all of the following except
d
30
The oxygen that bridges two sugars in a disaccharide is known as a ___ bond.
glycosidic
31
Which of the following units is not found in a DNA molecule?
b
32
Which of the following amino-acids is not chiral?
e
33
Which of the following statements concerning cell membranes is/are correct?
b
34
Which of the following represents the linkage connecting amino acids in proteins?
a
35
Which of the following statements concerning polysaccharides is/are correct? 1. Humans do not have enzymes that will break down cellulose. 2. Amylopectin and glycogen are both branched chains of glucose. 3. Amylose starch is a linear polysaccharide.
e
36
Which of the following is not a polysaccharide?
b
37
Given the following reduction potentials, NAD+ + H+ + 2e− → NADH Ε° = −0.105 V 2H+ + 2e− → H2 Ε° = 0.000 V calculate the standard reduction potential and identify the reducing agent in the following reaction. NAD+ + H2 → NADH + 2H+
c
38
One way our bodies produce ATP is to couple the formation of ATP from ADP with the hydrolysis of phosphoenopyruvate (PEP), as shown below.
b
39
The melting point of lipids depends on the strength of the intermolecular forces present in the solid. Rank the following fatty acids in order of increasing melting point.
a
40
An important reaction in the production of energy from sugars (glycolysis) is the reduction of pyruvate to lactate by NADH.
e
41
Which of the following statements concerning lipids is/are correct?
e
42
Which of the following pairs of compounds form a nucleoside?
not b
43
Which of the following is not a component of DNA?
c
44
Which of the following reactions is responsible for the formation of glycosidic bonds in disaccharides?
not c or a or e
45
The side chains of nonpolar amino acids contain _____.
a
46
Which of the following statements concerning protein synthesis is/are correct?
e
47
A compound which contains both a positive and negative charge is called a ____.
dipolar
48
Which of the following is not a step in protein synthesis?
c
49
Aerobic respiration links the oxidation of glucose with the production of ATP form ADP.
d
50
Which of the following pairs of compounds form a nucleoside?
a
51
How many unique tripeptides can be made from two molecules of valine (val) and one molecule of alanine (ala)?
c
52
Which of the following statements concerning carbohydrates is not correct?
d
53
What is the functional group corresponding to a peptide bond?
c
54
A triose is a monosaccharide with three carbon atoms. The molecular formula of a triose is _____.
a
55
A disaccharide is formed when two monosaccharides are linked by the elimination of a molecule of water and the formation of an ether bond. The newly formed C⎯O bond linking the monosaccharides is called the ____ bond.
e
56
What is the general formula for carbohydrates?
not c or e maybe d
57
What is the role of tRNA in protein synthesis?
to decode the codons

Chem II (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions