本题目来源于试卷: Unity and Diversity A.2 Nucleic Acids，类别为 IB生物学
[单选题]
A strand of nucleotides 0g;s,ao wb/g5qo j8 ohgpk/f7 reads CCUAGAGCUUACCG. Which ty jsr.y *6zf*tgpe of pentose sugar could be found in the nucleo6. zyfs** trjgtides in this strand?
A. Deoxyribose only
B. Ribose only
C. Both deoxyribose and ribose
D. Neither deoxyribose nor ribose
参考答案: B
本题详细解析:
The nucleotide strand CCUAGAGCUUACCG contains the bases cytosine (C),)k0q,ux4rf k8 p iol5kuj2)k q uracil (U), adeni,ro)f upi q02x)u4klk5q kjk8 ne (A), and guanine (G). While C, A, and G are found in both DNA and RNA, the base uracil is only found in RNA. So, the strand is an RNA strand.RNA contains the pentose sugar ribose. Therefore, ribose is found in the nucleotides in the strand.Choices A and C are incorrect because deoxyribose is only found in DNA, not RNA. The nucleotide strand cannot be DNA because it contains uracil in place of thymine (T).Choice D is incorrect because the strand is RNA which contains ribose.
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