BIO 205 EXAM 3 TEST LATEST UPDATE
WITH 100% SOLVED -GRADED A+
VERIFIED 2026 - 2027 UPDATE
_____Drug resistance occurs
A) because bacteria are normal microbiota.
B) when antibiotics are used indiscriminately.
C) against antibiotics and not against synthetic
chemotherapeutic agents.
D) when antibiotics are taken after the symptoms
disappear.
E) All of the answers are correct. - correct answer-
B) when antibiotics are used indiscriminately.
_____In Table 20.1, as illustrated by the data shown, the
minimal bactericidal concentration of antibiotic X is
A) 2 μg/ml.
B) 10 μg/ml.
C) 15 μg/ml.
D) 25 μg/ml.
,E) The answer cannot be determined based on the
information provided. - correct answer- C) 15
μg/ml.
_____In Table 20.2, the most effective antibiotic tested
was
A) A.
B) B.
C) C.
D) D.
E) The answer cannot be determined based on the
information provided. - correct answer- D) D.
_____Protozoan and helminthic diseases are difficult to
treat because
A) their cells are structurally and functionally similar to
human cells.
B) they replicate inside human cells.
C) they do not have ribosomes.
D) they do not reproduce.
,E) they have more genes than bacteria. - correct
answer- A) their cells are structurally and
functionally similar to human cells
_____The antimicrobial drugs with the broadest spectrum
of activity are
A) aminoglycosides.
B) chloramphenicol.
C) penicillin G.
D) macrolides.
E) tetracyclines - correct answer- E)
tetracyclines
_____Which of the following statements about drug
resistance is FALSE?
A) It may be carried on a plasmid.
B) It may be transferred from one bacterium to another
during conjugation.
C) It may be due to enzymes that degrade some
antibiotics.
, D) It is found only in gram-negative bacteria.
E) It may be due to increased uptake of a drug. -
correct answer- D) It is found only in gram-
negative bacteria.
23. Antibiotics and antimicrobial drugs
target________________ in a microbe
A. cell wall
B. metabolism
C. proteins
D. DNA RNA synthesis
E. all of the above - correct answer- E. all of the
above
24. Which micro-organisms do we use for the production
of most of our antibiotics? - correct answer-
streptomycin
25. Define broad spectrum and narrow spectrum
antibiotics - correct answer- Narrow spectrum
WITH 100% SOLVED -GRADED A+
VERIFIED 2026 - 2027 UPDATE
_____Drug resistance occurs
A) because bacteria are normal microbiota.
B) when antibiotics are used indiscriminately.
C) against antibiotics and not against synthetic
chemotherapeutic agents.
D) when antibiotics are taken after the symptoms
disappear.
E) All of the answers are correct. - correct answer-
B) when antibiotics are used indiscriminately.
_____In Table 20.1, as illustrated by the data shown, the
minimal bactericidal concentration of antibiotic X is
A) 2 μg/ml.
B) 10 μg/ml.
C) 15 μg/ml.
D) 25 μg/ml.
,E) The answer cannot be determined based on the
information provided. - correct answer- C) 15
μg/ml.
_____In Table 20.2, the most effective antibiotic tested
was
A) A.
B) B.
C) C.
D) D.
E) The answer cannot be determined based on the
information provided. - correct answer- D) D.
_____Protozoan and helminthic diseases are difficult to
treat because
A) their cells are structurally and functionally similar to
human cells.
B) they replicate inside human cells.
C) they do not have ribosomes.
D) they do not reproduce.
,E) they have more genes than bacteria. - correct
answer- A) their cells are structurally and
functionally similar to human cells
_____The antimicrobial drugs with the broadest spectrum
of activity are
A) aminoglycosides.
B) chloramphenicol.
C) penicillin G.
D) macrolides.
E) tetracyclines - correct answer- E)
tetracyclines
_____Which of the following statements about drug
resistance is FALSE?
A) It may be carried on a plasmid.
B) It may be transferred from one bacterium to another
during conjugation.
C) It may be due to enzymes that degrade some
antibiotics.
, D) It is found only in gram-negative bacteria.
E) It may be due to increased uptake of a drug. -
correct answer- D) It is found only in gram-
negative bacteria.
23. Antibiotics and antimicrobial drugs
target________________ in a microbe
A. cell wall
B. metabolism
C. proteins
D. DNA RNA synthesis
E. all of the above - correct answer- E. all of the
above
24. Which micro-organisms do we use for the production
of most of our antibiotics? - correct answer-
streptomycin
25. Define broad spectrum and narrow spectrum
antibiotics - correct answer- Narrow spectrum
