SAT2生物考试成为了越来越多考生的选择，下面无忧小编为同学们整理了两道SAT2生物练习题及答案，希望对大家有所帮助。

　　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.

　　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, deoxyribonucleic acid, refers to this sugar, which is found in DNA but not RNA. RNA, or ribonucleic acid, contains the sugar ribose instead.

　　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.

　　以上便是无忧小编为大家搜集整理的两道SAT2生物练习题及答案的相关介绍，都来自SAT考试官方网站，后面附有答案和解析，还有难度标示。希望对大家有所帮助，各位考生可以根据自己的具体情况有选择地进行借鉴。如果同学们在备考SAT2考试中遇到其他问题，可以致电无忧在线培训专家。无忧小编祝大家都能取得好成绩!