Chapter 14:
Other Forms of Inheritance
Practice Test
1.
What is a segment of DNA that randomly inserts itself in a different chromosome within the cell by using reverse transcriptase?
a.
intron
b.
operon
c.
retrotransposon
d.
transposon
Hint
2.
When the transcription factor binds the DNA at the response element site, a nearby _______ is activated.
a.
response element
b.
transcription factor
c.
gene
d.
operon
Hint
3.
What is a site on bacterial DNA where RNA polymerase can bind and begin transcription?
a.
origin
b.
repressor
c.
operator
d.
promoter
Hint
4.
How many genes in humans are affected by genomic imprinting?
a.
about 50
b.
about 150
c.
at least 100
d.
at least 10
Hint
5.
In bacterial cells, the genes that code for enzymes involved in using the sugar lactose are expressed only when ________ is present.
a.
sucrose
b.
glucose
c.
lactose
d.
fructose
Hint
6.
What may be essential to signal that the developing zygote received a set of chromosomes from each parent?
a.
genetic imprinting
b.
epistasis
c.
genetic anticipation
d.
X-inactivation
Hint
7.
In men with fragile-X syndrome, the three nucleotides CGG may repeat 80 times and still be within the normal range. How many repeats of CGG are needed before a man shows symptoms of this disease?
a.
between 80 and 100 copies
b.
200 copies
c.
81 copies
d.
100 copies
Hint
8.
What is the source of all mitochondria in a zygote?
a.
the nucleus of the egg
b.
the cytoplasm of the egg
c.
the head of the sperm
d.
the tail of the sperm
Hint
9.
What is an entire set of genes and its control sequences?
a.
intron
b.
genome
c.
operon
d.
exon
Hint
10.
In eukaryotes, what is a regulatory DNA sequence that binds to a hormone-receptor complex?
a.
promoter
b.
response element
c.
transcription factor
d.
operon
Hint
