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MCB4271 FINAL EXAM NEWEST 2025 ACTUAL EXAM|
COMPLETE 100 QUESTIONS AND VERIFIED
ANSWERS (100% CORRECT ANSWERS) ALREADY
GRADED A+| MCB 4271 FINAL EXAM REVIEW 2025
(BRAND NEW!!)
The structure of B-lactam antibiotics resemble:
- a diamond
- a plane
- a house
- a cat - Correct Answer - C) a house
B-lactam antibiotics are characterized by:
- a 6-member ring containing a nitrogen
- a 5-member ring containing a nitrogen
- a 3-member ring containing a nitrogen
- a 4-member ring containing a nitrogen - Correct Answer - D) a 4-
member ring containing a nitrogen
What are penicillinases?
- enzymes that deactivate penicillin
- enzymes that export penicillin
- enzymes that activate penicillin 1 / 3
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- enzymes that import penicillin - Correct Answer - A) enzymes that
deactivate penicillin
What is the function of D-ala-D-ala
- mimics penicillins
- binds to penicillins
- peptidoglycan terminus
- inhibits penicillinases - Correct Answer - C) peptidoglycan terminus
What antibiotic caps D-ala-D-ala?
- penicillin
- fosfomycin
- clavam
- vancomycin - Correct Answer - D) vancomycin
What is the function of the penicillin binding protein?
- to crosslink peptidoglycan
- to degrade penicillin
- to bind penicillin
- to degrade peptidoglycan - Correct Answer - A) to crosslink
peptidoglycan
Conversion of dihydrofolate back to tetrahydrofolate is essential to keep a constant supply of which nucleotide? 2 / 3
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- dATP
- dTTP
- dCTP
- dGTP - Correct Answer - B) dTTP
What is the function of dihydrofolate reductase (DHFR)?
- converts dihydrofolate to tetrahydrofolate
- converts tetrahydrofolate to dihydrofolate
- removes methyl from tetrahydrofolate
- adds methyl to tetrahydrofolate - Correct Answer - A) converts
dihydrofolate to tetrahydrofolate
Which of the following antibiotics can be inactivated by B-lactamases?1) penicillin 2) ampicillin 3) tetracycline 4) cephalosporin - Correct Answer - 1, 2, 4
What is the functional consequence of drugs that inhibit the generation of muropeptides?
- a decrease in efficiencies of B-lactam antibiotics
- activation of two-component regulatory systems
- increases resistance to antibiotics
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