AP Biology (Mader), 11th Edition

Chapter 12: Molecular Biology of the Gene

Post-Test

1
Eukaryotic chromosomes are made of:
A)proteins and DNA
B)enzymes and substrates
C)polysaccharides and lipids
D)phospholipids and cholesterol
2
DNA is composed of a double strand of nucleotides. Because the sugar-phosphate backbone of one strand is upside down relative to the backbone of the other strand, these strands are referred to as:
A)semi-conservative.
B)Okazaki strands.
C)nucleosomes.
D)anti-parallel.
3
Nucleic acids contain _____ type(s) of nucleotide(s).
A)one
B)two
C)three
D)four
4
Nucleic acids can be distinguished from proteins by _____.
A)the presence of phosphorous in nucleic acids
B)the presence of sulfur in nucleic acids
C)the presence of carbon in nucleic acids
5
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Use the Table to answer the following question. If the sequence of amino acids encoded by a strand of DNA is serine-alanine-lysine-leucine, then what is the order of bases in the strand of DNA?
A)UGUGCAAAGUUA
B)AGACGTTTCAAT
C)AGAGCTTTGAAT
D)UCUGCATTCTTA
6
Okazaki fragments are joined together to make up the ______ strand of newly synthesized DNA.
A)leading
B)lagging
C)RNA
7
The 3' end of each Okazaki fragment is joined to the 5' end of the next fragment by _____.
A)DNA repair enzymes
B)RNA polymerase
C)helicase
D)DNA ligase
8
The Y-shaped region on a replicating DNA molecule where parent strands are being unwound and new DNA strands are growing is referred to as a _____.
A)chiasmata
B)replication fork
C)gene locus
D)cleavage furrow
9
Choose the correct order of events that occur during translation.
A)Initiation, elongation, termination
B)RNA polymerase attachment to promoter site, initiation, elongation and termination
C)Initiation, splicing of introns, ribozyme processing, exon shuffling
D)Unwinding and complementary base pairing and joining by DNA polymerase
10
New complementary nucleotides are positioned and joined by _____ during replication.
A)DNA polymerase
B)helicase
C)sucrase
D)RNA polymerase
11
At what site is mRNA translated to make protein?
A)Ribosomes
B)The replication fork of DNA
C)The lagging strand of DNA
D)The Golgi Bodies
12
In _____, replication can occur in two directions at once because the DNA molecule is circular.
A)prokaryotes
B)eukaryotes
C)viruses
13
The rungs of ladder (DNA) are the _____.
A)deoxyribose sugars
B)phosphate groups
C)hydrogen-bonded bases
14
If a segment of DNA contains 430 nucleotides and 120 of the nucleotides are guanine, there will be _____ cytosine nucleotides.
A)120
B)190
C)95
D)None of these
15
In Griffith's experiment _____.
A)S strain bacteria killed the mice
B)R strain bacteria killed the mice
C)heat-killed S strain bacteria killed the mice
D)a mixture of heat-killed S strain bacteria and R strain bacteria failed to kill the mice
16
There are three major classes of RNA. Which of the following does NOT describe the function of at least one type of RNA?
A)Transfer amino acids to the ribosomes
B)Takes a message from DNA in the nucleus to the ribosomes in the cytoplasm.
C)Packages DNA so that it can fit into a small place.
D)Along with proteins, makes up ribosomes, where proteins are synthesized.
17
DNA replication is best described as _____.
A)completely conservative
B)semiconservative
C)a very slow process
D)error-free
18
Which of these is NOT part of a mRNA molecule?
A)Intron
B)Cap
C)Exon
D)Poly-A tail
19
Which of the following statements is false?
A)The genetic code is degenerate, meaning that most amino acids have more than one codon.
B)Some codons are used for termination or initiation of a gene.
C)All codons code for a specific amino acid.
D)There are sixty-four different codons.
20
A promoter is defined as _______.
A)an enzyme which turns on a gene to transcribe an RNA molecule
B)the active portion of an RNA molecule
C)the site where RNA polymerase will bind to DNA
D)the non-protein coding sequences of DNA
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