UNE BIOL 1020 Exam Questions and Correct Answers
Updated
Question 1
In order to get around the lack of ability of prokaryotes to remove introns from precursor RNA,
it may be necessary to
Correct Answer
turn mRNA into cDNA.
Question 2
Carries viral genes from bacterial chromosomes
Correct Answer
Transduction
Question 3
Phages that can either replicate and cause cell lysis or can integrate their DNA into the host DNA
are called
Correct Answer
temperate phages.
Question 4
Multiple enzymes may repair an A-C error left unrecognized by DNA polymerase
Correct Answer
Mismatch repair
Question 5
Strain differences are helpful in
,Correct Answer
tracing the source of outbreaks of disease.
Question 6
Movement of spirochetes occurs by means of structures called
Correct Answer
axial filaments.
Question 7
PCR is particularly useful in
Correct Answer
- assessing impure (multiple types of bacteria present) samples.- relatively quickly producing
results.- detecting viable yet non-culturable organisms.- dealing with very small numbers of
bacteria.-> All of the answer choices are correct.
Question 8
Follows the lytic cycle of a bacteriophage
Correct Answer
Transduction
Question 9
An ideal vector
Correct Answer
A. may be a plasmid or bacteriophage.
B. has multiple restriction enzyme recognition sites.
C. contains an origin of replication.
D. contains a selectable marker.
,-> E. All of the choices are correct.
Question 10
Phenotype
Correct Answer
Colonies on agar have a purple color
Question 11
The agarose used in electrophoresis
Correct Answer
acts as a sieve.
Question 12
Why is it a good idea for a bacterial cell to be able to utilize glucose FIRST as an energy source
(until it is used up), THEN switch to lactose?
Correct Answer
Glucose is an easier compound to break down and obtain energy from than lactose AND it's
about conservation of energy-why expend the energy to make the extra enzymes for breaking
down lactose when glucose is right there and doesn't need extra enzymes for breakdown
Question 13
Anoxygenic phototrophs
Correct Answer
use hydrogen sulfide or organic compounds as a source of electrons.
Question 14
, The size of the amplified DNA fragment generated during PCR is determined by
Correct Answer
the locations to which the primers anneal.
Question 15
Thymine dimers are dealt with by
Correct Answer
Photoreactivation repair AND excision repair
Question 16
If the G+C content of two organisms is 45% in both
Correct Answer
they may or may not be related.
Question 17
Serological methods
Correct Answer
A. are useful in identifying unknown bacteria.
B. rely on the specificity of an antibody-antigen interaction.
C. may be simple and rapid.
D. use cellular proteins and carbohydrates as markers.
-> E. All choices are correct.
Question 18
To increase the proportion of mutants in a population of bacteria one may use
Correct Answer
Updated
Question 1
In order to get around the lack of ability of prokaryotes to remove introns from precursor RNA,
it may be necessary to
Correct Answer
turn mRNA into cDNA.
Question 2
Carries viral genes from bacterial chromosomes
Correct Answer
Transduction
Question 3
Phages that can either replicate and cause cell lysis or can integrate their DNA into the host DNA
are called
Correct Answer
temperate phages.
Question 4
Multiple enzymes may repair an A-C error left unrecognized by DNA polymerase
Correct Answer
Mismatch repair
Question 5
Strain differences are helpful in
,Correct Answer
tracing the source of outbreaks of disease.
Question 6
Movement of spirochetes occurs by means of structures called
Correct Answer
axial filaments.
Question 7
PCR is particularly useful in
Correct Answer
- assessing impure (multiple types of bacteria present) samples.- relatively quickly producing
results.- detecting viable yet non-culturable organisms.- dealing with very small numbers of
bacteria.-> All of the answer choices are correct.
Question 8
Follows the lytic cycle of a bacteriophage
Correct Answer
Transduction
Question 9
An ideal vector
Correct Answer
A. may be a plasmid or bacteriophage.
B. has multiple restriction enzyme recognition sites.
C. contains an origin of replication.
D. contains a selectable marker.
,-> E. All of the choices are correct.
Question 10
Phenotype
Correct Answer
Colonies on agar have a purple color
Question 11
The agarose used in electrophoresis
Correct Answer
acts as a sieve.
Question 12
Why is it a good idea for a bacterial cell to be able to utilize glucose FIRST as an energy source
(until it is used up), THEN switch to lactose?
Correct Answer
Glucose is an easier compound to break down and obtain energy from than lactose AND it's
about conservation of energy-why expend the energy to make the extra enzymes for breaking
down lactose when glucose is right there and doesn't need extra enzymes for breakdown
Question 13
Anoxygenic phototrophs
Correct Answer
use hydrogen sulfide or organic compounds as a source of electrons.
Question 14
, The size of the amplified DNA fragment generated during PCR is determined by
Correct Answer
the locations to which the primers anneal.
Question 15
Thymine dimers are dealt with by
Correct Answer
Photoreactivation repair AND excision repair
Question 16
If the G+C content of two organisms is 45% in both
Correct Answer
they may or may not be related.
Question 17
Serological methods
Correct Answer
A. are useful in identifying unknown bacteria.
B. rely on the specificity of an antibody-antigen interaction.
C. may be simple and rapid.
D. use cellular proteins and carbohydrates as markers.
-> E. All choices are correct.
Question 18
To increase the proportion of mutants in a population of bacteria one may use
Correct Answer
