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 reads CCUAGAGCUUACCG. Which type of s6)kl3s;lp1 yvx lw9 ktgh, u2pentose pz 4:yu):p8qf z:3ayma fl i2hb wa(2jsugar could be found :pi3lzjaa afbu:) w fq:24y8(h y2zpmin the nucleotides 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), uracil (esc; 6ep9k. t7sil tk+U), adenine (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;+s s p6te7.9leck tik 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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