L-lysine is an essential amino acid and must be supplied in the diet. By comparison, the stereoisomer D-lysine is not biologically active. Why can your body only utilize one form?
A. Since the L form and D form are enantiomers, they will bind together and inhibit utilization of the D form.
B. Antibodies recognize the D form and destroy it before your body can use it for nutritional purposes.
C. Enzymes can only recognize a single, specific stereoisomer.
D. Since the L form and D form are chiral molecules, they will bind together and inhibit utilization of the D form.
Answer: C
You might also like to view...
The probability that a boy whose mother is heterozygous for an X-linked trait inherits the recessive allele is
A) 1/16. B) 1/8. C) 1/4. D) 1/2.
The big bang theory states that the universe began approximately ________ years ago
a. 3.5 billion b. 10,000 c. 1.2 million d. 120 million e. 13 billion
HIV inserts its genome into the host cell's DNA
Indicate whether the statement is true or false.
________ extend out from the exposed tip of taste cells into the mouth
A) Papillae B) Taste hairs C) Olfactory bulbs D) Spindles E) Tendons