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1406 Test 4 Review Flashcards | StudBud
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1406 Test 4 Review
1406 Test 4 Review
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1
What enzyme acts to seal in foreign DNA into a plasmid ring?
DNA polymerase
RNA Ligase
DNA ligase
restriction enzymes
2
All of these are agents of evolution except....
Genetic drift
Natural selection
No gene flow
Non random mating
3
Restriction enzymes cuts a DNA molecule 3 times producing different sized fragments. What will the gel look like?
3 bands in one column.
4 bands in 4 separate columns.
3 bands in 3 separate columns.
4 bands in one column.
4
Which well has DNA fragments that are 600bp and 400bp long?
1
L
2
3
5
What do restriction enzymes do?
Make DNA
cut DNA
repair DNA
Make RNA
6
What organisms are more closely related?
chimp and lizard
hagfish and lizard
perch and mouse
Pigeon and chimp
7
What conditions need to be present for natural selection to occur?
Competition
Variation in the population
Reproductive fitness
All the above
8
What type of selection does this graph represent?
disruptive selection
natural selection
directional selection
stabilizing selection
9
What is the difference between cDNA and DNA?
cDNA is DNA minus the exons.
cDNA is DNA minus the introns.
mRNA forms from cDNA and not DNA.
cDNA is the complimentary strand of DNA.
10
What was the name of the ship Charles Darwin sailed on?
DSW United Way
British Oceanway
HMS Beagle
Titanic
11
What type of selection does this graph represent?
stabilizing selection
directional selection
disruptive selection
diversifying selection
12
A restriction enzyme cut a DNA molecule into 4 fragments. 2 are the same size. What does the gel look like?
Gel has 5 bands in one column.
Gel has 4 bands in one column.
Gel has 3 bands in one column.
Gel has 4 bands across 4 columns.
13
Eukaryotic cells evolved from Prokaryotic cells.
True
False
14
If P=.7, what is q?
.5
.2
.93
.3
15
Gel Electrophoresis separates DNA by means of ________.
length and size
weight and size
size and charge
weight and mass
16
How does the CRISPR gene function to modify the human genome?
It tells the chromosome to become a barr body.
It excises the mutation and replaces it with the correct sequence.
It switches on a gene to start producing the correct protein.
It cuts the chromosome and rearranges it.
17
Plamids act as what during rDNA technology.
Restriction enzymes
PCR
Vectors
RNA structures
18
What is a product called that is produced from a GMO?
modern biology product
PCR
biotechnology product
transgenetic bacteria
19
When a population is at hardy-Weinberg equilibrium, that means...
The allele frequency’s are changing
Allele frequency’s stay the same so the population is evolving.
Evolution is occurring
The allele frequency’s are not changing
20
What type of speciation occurs due to geographic barriers like mountain ranges?
symbiotic speciation
parapatric speciation
sympatric speciation
allopatric speciation
21
What type of selection selects for two extreme phenotypes while selecting against the average phenotype.
disruptive selection
directional selection
stabalizing selection
natural selection
22
If a restriction enzyme cut a DNA strand in 4 places, there will be 4 fragments.
False
True
23
When the death rate exceeds the birthrate in a population, this an example of bottleneck effect.
False
True
24
Humans evolved from modern day apes.
False
True
25
What agent of evolution can bring about new varitation (new alleles).
natural selection
mutations
genetic drift
gene flow
26
If the homozygous dominate frequency is .64, what is the heterozygous frequency?
.8
.16
.2
.32
27
What species did Darwin observe at the Galápagos Islands that demonstrated adaptive radiation?
Rabbits
Salamanders
Emus
Finches
