ch04 - Chapter 4: Amino Acids Matching A) B) C) D) E) F) G)...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 4: Amino Acids Matching A) uncharged B) deprotonated C) three D) -amino group E) two F) C-terminus G) lysine H) racemic mixture I) zero J) protonated K) isoleucine L) tryptophan M) phenylalanine 1. When a peptide bond is formed, an ______ reacts with a carboxylate group. Ans: D Section: 4.1.B Level of Difficulty: Easy Learning objective: Amino Acid Structure 2. In the peptide Trp-Ser-Val, valine is at the ______. Ans: F Section: 4.1.E Level of Difficulty: Easy Learning objective: Amino Acid Structure 3. At a pH above its p K , the phenolic group of tyrosine is ______. Ans: B Section: 4.1.C Level of Difficulty: Easy Learning objective: Amino Acid Structure
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4. At a pH below its p K , the -amino group of lysine is ______. Ans: J Section: 4.1.D Level of Difficulty: Easy Learning objective: Amino Acid Structure 5. At a pH below its p K , the -carboxylate group of Asp is ______. Ans: A or J Section: 4.1.D Level of Difficulty: Easy Learning objective: Amino Acid Structure 6. The net charge of the zwitterion form of Gly is ______. Ans: I Section: 4.1.A Level of Difficulty: Easy Learning objective: Amino Acid Structure 7. Biological systems usually produce a single enantiomer, whereas chemical synthesis produces a ______. Ans: H Section: 4.2 Level of Difficulty: Easy Learning objective: Amino Acid Structure 8. In the tripeptide Trp-Val-Phe, the N-terminal residue is ______. Ans: L Section: 4.1.E Level of Difficulty: Easy Learning objective: Amino Acid Structure 9. In the tripeptide Lys-Pro-Ile, the C-terminal residue is _________. Ans: K Section: 4.1.E Level of Difficulty: Easy
Background image of page 2
Learning objective: Amino Acid Structure 10. In the tripeptide Lys-Pro-Ile, there are ______ charged groups at pH 7. Ans: C Section: 4.1.C Level of Difficulty: Easy Learning objective: Amino Acid Structure Multiple Choice 11. Which of the following amino acids has a charged polar side chain at pH 7? A) Leu B) Ala C) Met D) Trp E) Glu Ans: E Section: 4.1.C Level of Difficulty: Easy Learning objective: Amino Acid Structure 12. Which of the following amino acids has a sulfur atom in its side chain? A) Asn B) Ser C) Phe D) Met E) Tyr Ans: D Section: 4.1.C Level of Difficulty: Easy Learning objective: Amino Acid Structure 13. Which of the following amino acids has an uncharged polar side chain at pH 7? A) Arg B) Thr C) Glu D) Pro
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
E) Ile Ans: B Section: 4.1.C Level of Difficulty: Easy Learning objective: Amino Acid Structure 14. At pH 7, arginine (p K s are -carboxylate 1.82, -amino 8.99, guanidino 12.48) would be charged as follows: A) 0 -carboxylate, 0 -amino, +1 guanidino,
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 11

ch04 - Chapter 4: Amino Acids Matching A) B) C) D) E) F) G)...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online