Biochemistry Final Exam Review Questions & Answers 100% Correct!

Myoglobin was an example protein when the video started talking about folding. Myoglobin is found in large amounts in _____________________. A) muscle B) brain C) fat D) skin - ANSWERSA) muscle Coenzymes such as water-soluble vitamins are needed in only small amounts because A) each vitamin molecule can be reused many times as a cofactor. B) they can be eliminated in the urine. C) only small amounts of substrates are available at any one time. D) only small amounts of enzymes are present in each cell. E) they can be stored in the liver for future use. - ANSWERSA) each vitamin molecule can be reused many times as a cofactor. The orientation of water molecules around an ion in a solution will be completely random. a. True b. False - ANSWERSb. False _________________ are organic carrier or helper molecules for enzymes. A) coenzymes B) macronutrients C) minerals D) proteins - ANSWERSA) coenzymes Van der Waals forces tend to be A) extremely weak unless surface area is extraordinarily high. - ANSWERSA) extremely weak unless surface area is extraordinarily high. The anti-codon containing molecules made of RNA that help transfer amino acids into the ribosome to add to the growing polypeptide chain are known as _______________. A) transfer RNAs. B) codons C) mRNAs D) small nuclear RNAs - ANSWERSA) transfer RNAs A bright yellow vitamin that is important in the formation of FAD and FMN, is A) thiamine (B1) B) riboflavin (B2) C) niacin (B3) D) ascorbic acid (C) E) vitamin K - ANSWERSB) riboflavin (B2) Hydrogen bonds from between _________ and _____________. A) donors and acceptors B) Metals and Lewis acids C) nitrogen and oxygen D) carbon and nitrogen - ANSWERSA) donors and acceptors Which of the following amino acids has its isoelectric point at the lowest pH? A) aspartic acid B) glycine C) valine D) arginine E) methionine - ANSWERSA) aspartic acid α-Keratin is a member of a superfamily of structural proteins called _____________ proteins. A) coiled-coil B) β-sheet C) β-barrel D) globular - ANSWERSA) coiled-coil Consider a mixture of the amino acids lysine (pI = 9.7), tyrosine (pI = 5.7), and glutamic acid (pI = 3.2) at a pH 5.7 that is subjected to an electric current. __________ will migrate towards the positive electrode(+). A) Tyrosine B) Glutamic acid C) Lysine D) All of the amino acids - ANSWERSB) Glutamic acid New protein-coding genes are often initially formed by