兩道SAT2生物練習(xí)題(附答案).

　　SAT2考試是SAT subject test的通常說(shuō)法，SAT2考試有別于SAT1，它是一種專項(xiàng)考試，考察學(xué)生某一科目的能力。下面澳際小編為大家搜集整理了兩道SAT2生物練習(xí)題，附答案，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.

　　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.

　　以上便是兩道SAT2生物練習(xí)題，附答案的相關(guān)介紹，大家可以在備考的時(shí)候進(jìn)行適當(dāng)?shù)膽?yīng)用。想要了解更多關(guān)于“SAT2生物考試”的信息，請(qǐng)撥打免費(fèi)留學(xué)培訓(xùn)熱線：400-601-0022，或者直接點(diǎn)擊網(wǎng)頁(yè)上的“在線咨詢”，與我們的澳際培訓(xùn)專家一對(duì)一溝通交流!