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When D-threose is treated with NaBH4/H2O, it forms _______.


A) a racemic mixture of alditols
B) a meso alditol
C) an optically active alditol
D) an optically active aldonic acid
E) none of these

F) A) and E)
G) A) and D)

Correct Answer

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Which one of the following heterocyclic amines is not a base in RNA?


A) uracil
B) thymine
C) cytosine
D) adenine
E) guanine

F) B) and E)
G) C) and E)

Correct Answer

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