The first items in the Biology E/M test are arranged in sets with common answer choices. These items appear in the core section of the test. Remember, these are not MATCHING challenges — each answer choice can be used once, more than once, or not at all.
Nitrogenous base that occurs in RNA but not in DNA
The correct answer is C
The correct answer is Uracil. Uracil is one of the four nitrogenous bases found in RNA. The other three nitrogenous bases in RNA are also found in DNA, but uracil is not found in DNA.
Sugar that occurs in DNA but not in RNA
The correct answer is A
The correct answer is deoxyribose. The name of DNA, deoxyribonucleic acid, refers to this sugar, which is found in DNA but not RNA. RNA, or ribonucleic acid, contains the sugar ribose instead.