SAT2生物真题练习.

　　下面澳际小编为大家搜集整理了SAT2生物真题练习，希望可以帮助初次接触到SAT2生物考试的考生熟悉和了解相关的SAT2生物词汇和题型等。

　　希望对大家备考SAT2美国历史有所帮助。

　　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

　　Answer Choices

　　(A) Deoxyribose

　　(B) Ribose

　　(C) Uracil

　　(D) Cytosine

　　(E) Thymine

　　The correct answer is C

　　Explanation

　　Difficulty: Easy

　　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

　　Answer Choices

　　(A) Deoxyribose

　　(B) Ribose

　　(C) Uracil

　　(D) Cytosine

　　(E) Thymine

　　The correct answer is A

　　Explanation

　　Difficulty: Easy

　　The correct answer is deoxyribose. The name of DNA, deoxyribonucl acid, rers to this sugar, which is found in DNA but not RNA. RNA, or ribonucl acid, contains the sugar ribose instead.

　　以上便是澳际小编为大家搜集整理的SAT2生物真题练习，希望对同学们有所帮助。如果同学们在备考SAT2生物考试中遇到其他问题，可以致电澳际在线培训专家。