16 Questions
Which molecule does not do oxidative damage?
Calcium 2+
In which direction is the protein built in the ribosome?
N terminus to C terminus
Which of the following amino acids is aromatic?
Phenylalanine
What is the mechanism of action of beta lactam antibiotics?
They inhibit the construction of the cell wall
What is the relationship between D-glucose and D-galactose?
Epimers
In one form of β-thalassemia, patients have significantly reduced levels of β-globin transcripts. What best explains the molecular reason for these observations?
Splicing alteration of the β-globin mRNA
Where does the conversion of hydroxyvitamin D to 1,25-dihydroxyvitamin D mainly occur?
Kidneys
Which metal is not responsible for the production of reactive oxygen species?
Magnesium
What mutation creates a 'stop codon'?
Nonsense
Which vitamin causes Hyperhomocysteinemia?
Vitamin B12
In comparing the α-helix to the β-sheet, which statement is correct only for the β-sheet?
It is stabilized by interchain hydrogen bonds
What is the function of a buffer?
Resists changes in pH level
What is the difference between cofactors and a prosthetic group?
Cofactors bind loosely and prosthetic groups bind tightly
Which of the following vitamins becomes a major electron acceptor as a coenzyme, aiding in the oxidation of numerous substrates?
Vitamin B3 (Niacin)
What is the relationship between competitive inhibition and noncompetitive inhibition?
Competitive inhibition: vmax constant, km increase; Noncompetitive inhibition: vmax decrease, km constant
Which of the following substances leads to severe respiratory depression?
Fentanyl
Test your knowledge of biochemistry and molecular biology with this quiz. Explore topics such as chiral molecules, beta-lactam antibiotics, oxidative damage, protein synthesis, and more. See how well you understand these fundamental concepts in life sciences.
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