Chp 19 Protiens and Amino Acids_CHM1046
- 1. Collagen can be classified as a structural protein.
A) false
B) true
- 2. The protein that transports oxygen in the blood is hemoglobin
A) false
B) true
- 3. Amino acids that are not synthesized in the body but must be ingested with the diet are called __________ amino acids.
A) essential
B) value
C) critical
D) amide
- 4. A zwitterion of any amino acid has a net charge of __________.
A) 0
B) 1+
C) 3
D) 1-
E) 2
- 5. The isoelectric point for any amino acid is the pH at which the amino acid has a net charge of __________.
A) 1-
B) 2-
C) 2+
D) 0
E) 4
- 6. Hemoglobin is a transport protein.
A) True
B) False
- 7. Zwitterions have an overall positive charge
A) True
B) False
- 8. The dipeptide abbreviated as Gly-Lys is the same as the dipeptide abbreviated as Lys-Gly
A) false
B) true
- 9. The dipeptide abbreviated as Gly-Lys is the same as the dipeptide abbreviated as Lys-Gly
A) false
B) true
- 10. the peptide bonds between the amino acids is a
A) secondary structure
B) primary structure
C) quaternary
D) tertiary
- 11. The α helix of the secondary structure of a protein is held together by __________ between two widely separated parts of a protein chain.
A) hydrophobic interactions
B) hydrogen bonds
C) disulfide bridges
D) salt bridges
- 12. In the β-pleated sheet secondary structure of a protein, two or more amino acid sequences in separate parts of the protein are held together
A) in a coil, by hydrogen bonding.
B) in a double helix.
C) in a zig-zag conformation, by hydrogen bonding.
D) in random order, due to hydrophobic interactions.
- 13. The fibrous protein responsible for the structure of hair and wool is
A) cytoplasm
B) keratin
C) collagen
D) endorphin
- 14. Which R group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein?
A) CH2OH
B) CH2COO-
C) CH3
- 15. A peptide bond contains which kind of functional group?
A) ketone
B) alcohol
C) amide
D) carboxylic acid
- 16. Which of the following shows all of the tripeptides that can be formed from one molecule each of lysine (Lys), threonine (Thr), and histidine (His)?
A) Lys-His-Thr, His-Thr-Lys, His-Lys-Thr, Thr-Lys-His, Thr-His-Lys
B) Lys-Thr-His
C) Lys-Thr-His, Lys-His-Thr, His-Thr-Lys, His-Lys-Thr, Thr-Lys-His, Thr-His-Lys
- 17. In the peptide Ser-Cys-Ala-Gly, the C-terminal end is
A) glycerine
B) serine
C) glycine
D) alanine
- 18. In a typical amino acid zwitterion, the carboxylate end is
A) attached to an amine.
B) negatively charged.
C) neutral.
D) soluble in a nonpolar solvent.
- 19. Bonus! Briefly explain what causes someone to have sickle cell anemia
|
Students who took this test also took :