Bio-226 FINAL EXAM STUDY GUIDE questions with
verified answers
A bacterial species called Dermabacter hominisis commonly found on
human skin, where it is thought to grow on dead skin cells without
either helping or harming their host. What type of relationship exists
between this species and humans?
a. pathogenic
b. commensal
c. mutualistic
d. opportunistic
e. antagonistic Ans✓✓✓ B. commensal
A combination of antimicrobial drugs that show synergism is
a. a pair of drugs where one keeps the other one from having an effect.
b. used only for infections where drug resistance has already been
observed.
c. drugs that work together more effectively than either one alone.
d. a pair of drugs where one kills gram-positive and the other kills gram-
negative. Ans✓✓✓ C. drugs that work together more effectively than
either one alone.
,A DNA strand with the base sequence TTTTT will base pair with DNA
containing the base sequence
a. AAAAAA
b. UUUUUU
c. TTTTTTT
d. GGGGGG Ans✓✓✓ A. AAAAAA
A drug that is able to work against both gram-positive and gram-
negative bacteria is classified as...
a. a combination drug
b. a narrow-spectrum drug
c. a synergistic drug
d. a broad spectrum drug
e. an antibiotic Ans✓✓✓ D. a broad spectrum drug
A mutation that produces a shortened version of the normal protein is
called _____
a. frameshift
b. nonsense
c. insertion
, d. missense Ans✓✓✓ B. nonsense
A proton H+ gradient is used during respiration and photosynthesis to
produce.
a. ATP
b. electrons
c. light
d. water molecules
e. heat Ans✓✓✓ A. ATP
Adaptive immune responses that involve memory cells
a. are carried out by lymphocytes
b. are more likely to protect from disease than those that do not.
c. are classified as secondary responses
d. are faster to start, stronger, and longer-lasting than those that do not
involve memory cells.
e. all of the above are correct. Ans✓✓✓ E. all of the above are correct.
At least 3 drugs must be used in combination for treating HIV
infections. why is this necessary?
verified answers
A bacterial species called Dermabacter hominisis commonly found on
human skin, where it is thought to grow on dead skin cells without
either helping or harming their host. What type of relationship exists
between this species and humans?
a. pathogenic
b. commensal
c. mutualistic
d. opportunistic
e. antagonistic Ans✓✓✓ B. commensal
A combination of antimicrobial drugs that show synergism is
a. a pair of drugs where one keeps the other one from having an effect.
b. used only for infections where drug resistance has already been
observed.
c. drugs that work together more effectively than either one alone.
d. a pair of drugs where one kills gram-positive and the other kills gram-
negative. Ans✓✓✓ C. drugs that work together more effectively than
either one alone.
,A DNA strand with the base sequence TTTTT will base pair with DNA
containing the base sequence
a. AAAAAA
b. UUUUUU
c. TTTTTTT
d. GGGGGG Ans✓✓✓ A. AAAAAA
A drug that is able to work against both gram-positive and gram-
negative bacteria is classified as...
a. a combination drug
b. a narrow-spectrum drug
c. a synergistic drug
d. a broad spectrum drug
e. an antibiotic Ans✓✓✓ D. a broad spectrum drug
A mutation that produces a shortened version of the normal protein is
called _____
a. frameshift
b. nonsense
c. insertion
, d. missense Ans✓✓✓ B. nonsense
A proton H+ gradient is used during respiration and photosynthesis to
produce.
a. ATP
b. electrons
c. light
d. water molecules
e. heat Ans✓✓✓ A. ATP
Adaptive immune responses that involve memory cells
a. are carried out by lymphocytes
b. are more likely to protect from disease than those that do not.
c. are classified as secondary responses
d. are faster to start, stronger, and longer-lasting than those that do not
involve memory cells.
e. all of the above are correct. Ans✓✓✓ E. all of the above are correct.
At least 3 drugs must be used in combination for treating HIV
infections. why is this necessary?
