STRAIGHTERLINE MICROBIOLOGY
EXAM WITH 100% CORRECT ANSWERS
2025
,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
Which of the following properties is likely to be found in a pioneer
colonizer of a biofilm on an artificial joint implant? - Correct Answer-
Surface structures for attaching to tissue
pg. 1 professoraxe
l
, A bacterium is inoculated into a tube of thioglycollate and
incubated. After incubation, turbidity appears throughout, top to
bottom, with the greatest turbidty at the very top. This bacterium
would be called a(n) . - Correct Answer-
facultative anaerobe
An organic nutrient that cannot be synthesized by the organism and
must be provided is called a(n) . - Correct
Answer-growth factor
Humans can see objects as small as 0.1 mm. Leeuwenhoek's best
microscope could magnify objects to 300X. Which of the following
would be invisible using Leeuwenhoek's microscope? - Correct
Answer-Poliovirus, 30 nm
Which of the following is not associated with every virus?
a. Envelope
b. Capsomeres
c. Capsid
d. Nucleic acid
e. Genome - Correct Answer-Envelope
pg. 2 professoraxe
l
EXAM WITH 100% CORRECT ANSWERS
2025
,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
Which of the following properties is likely to be found in a pioneer
colonizer of a biofilm on an artificial joint implant? - Correct Answer-
Surface structures for attaching to tissue
pg. 1 professoraxe
l
, A bacterium is inoculated into a tube of thioglycollate and
incubated. After incubation, turbidity appears throughout, top to
bottom, with the greatest turbidty at the very top. This bacterium
would be called a(n) . - Correct Answer-
facultative anaerobe
An organic nutrient that cannot be synthesized by the organism and
must be provided is called a(n) . - Correct
Answer-growth factor
Humans can see objects as small as 0.1 mm. Leeuwenhoek's best
microscope could magnify objects to 300X. Which of the following
would be invisible using Leeuwenhoek's microscope? - Correct
Answer-Poliovirus, 30 nm
Which of the following is not associated with every virus?
a. Envelope
b. Capsomeres
c. Capsid
d. Nucleic acid
e. Genome - Correct Answer-Envelope
pg. 2 professoraxe
l
