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. Since the L form and D form are chiral molecules, they will bind together and inhibit utilization of the D form.
C. Antibodies recognize the D form and destroy it before your body can use it for nutritional purposes.
D. Enzymes can only recognize a single, specific stereoisomer.
D. Enzymes can only recognize a single, specific stereoisomer.
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Operon(s) in bacteria
A. refers to a group of genes that are controlled in a coordinate fashion. B. involve polycistronic mRNA. C. involve monocistronic mRNA. D. are also known as Wagnerons. E. refers to a group of genes that are controlled in a coordinate fashion AND involve polycistronic mRNA.
Ribose has five carbon atoms, of which three are asymmetric. What is the maximum number of stereoisomers that may exist for ribose?
A) 2 B) 4 C) 6 D) 8 E) 10
Regardless of the exact approach taken to recombinant DNA technology, one of the keys to successful cloning is choosing the right vector.
Answer the following statement true (T) or false (F)
The original impetus to sequence the human genome was to investigate
A) how the four nitrogenous bases encode information. B) how people vary. C) how cancer arises. D) the effects of exposure to low-level radiation on the genetics of populations.