Quiz4 Flashcards
Which of the following is not a function of proteins?
E) Stores the genetic information of a living organism
Collagen, a protein found in tendons and cartilage, would be classified as a ______ protein.
D) Structural
The following amino acid side chain is —CH—CH₃ | CH₃. What type is it?
D) Hydrophobic
The peptide bonds that link amino acids in a protein are ______ bonds.
A) Amide bonds
What type of interaction occurs between —CH₂–C–O⁻ and —CH₂–CH₂–CH₂–CH₂–NH₃⁺ in protein tertiary structure?
A) Salt bridges
In the peptide Ser–Cys–Ala–Gly, the C-terminal end is?
E) Glycine
At a pH > 9, the zwitterion of glycine will have:
C) A net negative charge
Compared to an uncatalyzed reaction, an enzyme-catalyzed reaction:
C) Occurs at a faster rate
The water-soluble B and C vitamins supply:
D) Coenzymes required by some enzymes
A noncompetitive inhibitor:
C) Alters the three-dimensional structure of the enzyme
Enzymes that catalyze the same reactions but have slightly different structures are called:
E) Isoenzymes
A ______ consists of a nitrogen-containing base and a sugar.
D) Nucleoside
Which of the following cannot be found in a nucleotide of RNA?
A) Deoxyribose
The nucleotides in the backbone of DNA are held together by ______ bonds.
C) Phosphodiester
The base sequence complementary to T-G-G-C-C-A-A-A-C is:
A) A-C-C-G-G-T-T-T-G
What is the process in which the DNA double helix unfolds to synthesize a new strand?
C) Replication
Which type of RNA carries genetic info from DNA to ribosomes?
C) mRNA
What tripeptide is coded by UUU–AGA–CCA?
B) Phe–Arg–Pro
The codon is found on ______, and the anticodon is found on ______.
E) mRNA, tRNA
A defective enzyme caused by a mutation in DNA nucleotide sequence leads to:
B) A genetic disease
Protease inhibitors prevent:
C) Synthesis of viral proteins
Deletion of one DNA base causes what type of mutation?
B) Frame-shift mutation
Replacing one DNA base with another causes a:
D) Substitution mutation
What is the anticodon of -U-A-G-?
A) A-U-C
