Straighterline Micro 250 final prep latest
exam questions and answers
Which class of eukaryotic microorganisms can be subdivided into groups such as
Mastigophora, Sarcodina, Ciliophora, and Apicomplexa?
A. Helminths
B. Algae
C. Protozoa
D. Fungi - correct answer ✅Protozoa
Genetic material can be excised from one chromosome and directly integrated
into another via
A. conjugation.
B. transformation.
C. transduction.
,Straighterline Micro 250 final prep latest
exam questions and answers
D. transposons. - correct answer ✅transposons.
Which immune cell secretes numerous cytokines that help to coordinate the
response of other immune cells?
A. B cell
B. TH cell
C. TC cell
D. Platelets - correct answer ✅TH cell
Which of the following enzymes are used to amplify DNA during PCR?
A. restriction endonuclease
B. DNA polymerase
,Straighterline Micro 250 final prep latest
exam questions and answers
C. reverse transcriptase
D. DNA ligase - correct answer ✅DNA polymerase
In the nitrogen cycle, which of the following steps involves removal of nitrogen
from the atmosphere by bacteria? - correct answer ✅nitrogen fixation, In
nitrogen fixation, nitrogen is removed from the atmosphere by nitrogen-fixing
bacteria and converted to ammonia.
If enough h+ ions are added to pure water to raise the H+ concentration of the
solution to ten times higher than the original concentration, what is the resulting
OH- concentration of the solution? - correct answer ✅10 -8M
Fungi are able to reproduce asexually by creating conidiospores and
sporangiospores. Which of the following is an accurate explanation for why it is
advantageous that they are also capable of sexual reproduction?
Select one:
a. Asexually produced offspring are more likely to compete for resources and will
kill off the parental fungi.
, Straighterline Micro 250 final prep latest
exam questions and answers
b. Fungi normally produce sexually but produce asexually in harsh conditions such
as severe drought.
c. Offspring from two parents may have variations in form and function that
contribute to survival of the species.
d. Sexual reproduction produces more offspring at a faster rate than spore
formation. - correct answer ✅Offspring from two parents may have variations in
form and function that contribute to survival of the species.
In a laboratory bacterial cell culture that has been infected by a virus, plaques are
areas in which
Select one:
a. bacterial cells are resistant to the virus and have not been infected.
b. there is no nutrient available for the bacteria to grow.
c. the virus has spread and left behind the remains of dead cells.
d. the virus has not yet spread to that area of cells. - correct answer ✅the virus
has spread and left behind the remains of dead cells.
The sun's energy is delivered as discrete packets that travel as waves and are
called
Select one:
exam questions and answers
Which class of eukaryotic microorganisms can be subdivided into groups such as
Mastigophora, Sarcodina, Ciliophora, and Apicomplexa?
A. Helminths
B. Algae
C. Protozoa
D. Fungi - correct answer ✅Protozoa
Genetic material can be excised from one chromosome and directly integrated
into another via
A. conjugation.
B. transformation.
C. transduction.
,Straighterline Micro 250 final prep latest
exam questions and answers
D. transposons. - correct answer ✅transposons.
Which immune cell secretes numerous cytokines that help to coordinate the
response of other immune cells?
A. B cell
B. TH cell
C. TC cell
D. Platelets - correct answer ✅TH cell
Which of the following enzymes are used to amplify DNA during PCR?
A. restriction endonuclease
B. DNA polymerase
,Straighterline Micro 250 final prep latest
exam questions and answers
C. reverse transcriptase
D. DNA ligase - correct answer ✅DNA polymerase
In the nitrogen cycle, which of the following steps involves removal of nitrogen
from the atmosphere by bacteria? - correct answer ✅nitrogen fixation, In
nitrogen fixation, nitrogen is removed from the atmosphere by nitrogen-fixing
bacteria and converted to ammonia.
If enough h+ ions are added to pure water to raise the H+ concentration of the
solution to ten times higher than the original concentration, what is the resulting
OH- concentration of the solution? - correct answer ✅10 -8M
Fungi are able to reproduce asexually by creating conidiospores and
sporangiospores. Which of the following is an accurate explanation for why it is
advantageous that they are also capable of sexual reproduction?
Select one:
a. Asexually produced offspring are more likely to compete for resources and will
kill off the parental fungi.
, Straighterline Micro 250 final prep latest
exam questions and answers
b. Fungi normally produce sexually but produce asexually in harsh conditions such
as severe drought.
c. Offspring from two parents may have variations in form and function that
contribute to survival of the species.
d. Sexual reproduction produces more offspring at a faster rate than spore
formation. - correct answer ✅Offspring from two parents may have variations in
form and function that contribute to survival of the species.
In a laboratory bacterial cell culture that has been infected by a virus, plaques are
areas in which
Select one:
a. bacterial cells are resistant to the virus and have not been infected.
b. there is no nutrient available for the bacteria to grow.
c. the virus has spread and left behind the remains of dead cells.
d. the virus has not yet spread to that area of cells. - correct answer ✅the virus
has spread and left behind the remains of dead cells.
The sun's energy is delivered as discrete packets that travel as waves and are
called
Select one:
