Page |1
Straighterline Microbiology Actual
Exam 2025|Verified Questions And
Correct Answers| Excellent Scores
Cell walls are not typically possessed by ______. - correct-answer-protozoa
The two major groups of helminths are the ______ and the ______. - correct-
answer-roundworms; flatworms
Which of the following is not true of conjugation?
a. Involves direct contact between cells
b. Transfers genes for drug resistance
c. Transfers genes for enzymes and adherence molecules
d. Involves the action of bacteriophage
e. The donor retains a copy of the transferred genes - correct-answer-Involves the
action of bacteriophage
Sulfa drugs like Bactrim, given for bacterial infections, inhibit bacteria by blocking
folic acid synthesis. The precursor molecule of folic acid is para-amino benzoic
, Page |2
acid (PABA). Interestingly, PABA has a structure very similar to a sulfa drug. If a
sulfa drug is present, the bacterial enzyme will bind the sulfa drug because of
structural similarity. This is an example of ______. - correct-answer-competitive
inhibition
The unknown bacterium that you are testing makes the enzyme phenyalanine
deaminase, as indicated by the results of a phenylalanine test. This enzyme
facilitates the removal of a/an ______ group from the organic compound so it can
be converted into an intermediate compound for the Krebs cycle - correct-
answer-amino
The term used to describe all of the chemical reactions within a cell is ______. -
correct-answer-metabolism
Each of the following are electron carriers except ______. - correct-answer-FADP
The antiparallel arrangement within DNA molecules refers to - correct-answer-
one helix strand that runs from the 5' to 3' direction and the other strand runs
from the 3' to 5' direction
, Page |3
A screening system called the _______ test is used for detecting chemicals with
carcinogenic potential. - correct-answer-Ames
The following pertain to ribosomes during protein synthesis except - correct-
answer-they contain codons within their rRNA molecules.
Eukaryotic chromosomes differ from bacterial chromosomes because only
eukaryotes have
a. histone proteins.
b. chromosomes in a nucleus.
c. several to many chromosomes.
d. elongated, not circular, chromosomes.
e. All of the choices are correct - correct-answer-All of the choices are correct.
The process of forming glucose from various metabolic intermediates is called
______. - correct-answer-gluconeogenesis
In the cell, energy released by electrons is often used to phosphorylate ______. -
correct-answer-adp
Straighterline Microbiology Actual
Exam 2025|Verified Questions And
Correct Answers| Excellent Scores
Cell walls are not typically possessed by ______. - correct-answer-protozoa
The two major groups of helminths are the ______ and the ______. - correct-
answer-roundworms; flatworms
Which of the following is not true of conjugation?
a. Involves direct contact between cells
b. Transfers genes for drug resistance
c. Transfers genes for enzymes and adherence molecules
d. Involves the action of bacteriophage
e. The donor retains a copy of the transferred genes - correct-answer-Involves the
action of bacteriophage
Sulfa drugs like Bactrim, given for bacterial infections, inhibit bacteria by blocking
folic acid synthesis. The precursor molecule of folic acid is para-amino benzoic
, Page |2
acid (PABA). Interestingly, PABA has a structure very similar to a sulfa drug. If a
sulfa drug is present, the bacterial enzyme will bind the sulfa drug because of
structural similarity. This is an example of ______. - correct-answer-competitive
inhibition
The unknown bacterium that you are testing makes the enzyme phenyalanine
deaminase, as indicated by the results of a phenylalanine test. This enzyme
facilitates the removal of a/an ______ group from the organic compound so it can
be converted into an intermediate compound for the Krebs cycle - correct-
answer-amino
The term used to describe all of the chemical reactions within a cell is ______. -
correct-answer-metabolism
Each of the following are electron carriers except ______. - correct-answer-FADP
The antiparallel arrangement within DNA molecules refers to - correct-answer-
one helix strand that runs from the 5' to 3' direction and the other strand runs
from the 3' to 5' direction
, Page |3
A screening system called the _______ test is used for detecting chemicals with
carcinogenic potential. - correct-answer-Ames
The following pertain to ribosomes during protein synthesis except - correct-
answer-they contain codons within their rRNA molecules.
Eukaryotic chromosomes differ from bacterial chromosomes because only
eukaryotes have
a. histone proteins.
b. chromosomes in a nucleus.
c. several to many chromosomes.
d. elongated, not circular, chromosomes.
e. All of the choices are correct - correct-answer-All of the choices are correct.
The process of forming glucose from various metabolic intermediates is called
______. - correct-answer-gluconeogenesis
In the cell, energy released by electrons is often used to phosphorylate ______. -
correct-answer-adp
