NBDE Part I Biochem UPDATED ACTUAL Exam Questions and CORRECT Answers

NBDE Part I Biochem UPDATED ACTUAL
Exam Questions and CORRECT Answers
amino-glycosides do what? - CORRECT ANSWER - bind to 30s ribosomes and inhibit
mRNA translation(protein synthesis)


what are the ketogenic AA - CORRECT ANSWER - leucine and lysine



competitive inhibitor - CORRECT ANSWER - increase Km and Vmax constant



non-competitive inhibitor - CORRECT ANSWER - Km stays the same, decreased Vmax



vitamin C - CORRECT ANSWER - hydroxylation of proline and lysine during collagen
synthesis


which is the mechanism of action for fluorouracil - CORRECT ANSWER - suicide
inhibitor that works through irreversible inhibition of thymidylate synthase


where does N-glycosylation occur in cells - CORRECT ANSWER - RER



kleinfelters syndrome - CORRECT ANSWER - 47, XXY



turners syndrome - CORRECT ANSWER - 45, XO



prothrombin acts with what to form thrombin - CORRECT ANSWER - Ca2+



glycoprotein hormones - CORRECT ANSWER - LH, FSH, TSH, hCG

, which is not a glycoprotein hormone - CORRECT ANSWER - GH-7 (peptide hormone)



what is the substance of thrombin - CORRECT ANSWER - fibrinogen



what is intracellular element of glucagon - CORRECT ANSWER - cAMP



what process makes NADPH - CORRECT ANSWER - pentose phosphate shunt



rate limiting step of cholesterol biosynthesis - CORRECT ANSWER - HMG CoA
reductase


how is glucose and fructose associated with caries - CORRECT ANSWER - dextrans and
levans


what enzyme do oral bacterai use to create dextran - CORRECT ANSWER - dextran
sucrase(glucosyltransferase)


steptococcus breaks down sucrose into what products - CORRECT ANSWER - glucose +
fructose


glucans - CORRECT ANSWER - dextrans + mutans + levans



polymers of glucose - CORRECT ANSWER - dextrans and mutans



polymer of fructose - CORRECT ANSWER - levans



what caries iron in the plasma - CORRECT ANSWER - transferrin