兩道SAT2生物練習(xí)題及答案.

　　SAT2生物考試成為了越來(lái)越多考生的選擇，下面澳際小編為同學(xué)們整理了兩道SAT2生物練習(xí)題及答案，希望對(duì)大家有所幫助。

　　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, deoxyribonucl acid, rers to this sugar, which is found in DNA but not RNA. RNA, or ribonucl 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.

　　以上便是澳際小編為大家搜集整理的兩道SAT2生物練習(xí)題及答案的相關(guān)介紹，都來(lái)自SAT考試官方網(wǎng)站，后面附有答案和解析，還有難度標(biāo)示。希望對(duì)大家有所幫助，各位考生可以根據(jù)自己的具體情況有選擇地進(jìn)行借鑒。如果同學(xué)們?cè)趥淇糞AT2考試中遇到其他問題，可以致電澳際在線培訓(xùn)專家。澳際小編祝大家都能取得好成績(jī)!