A. Adenine and guanine B. Cytosine and thymine C. Adenine and thymine D. Guanine and cytosine 相关知识点: 试题来源: 解析 C、D。在 DNA 结构中,腺嘌呤(A)与胸腺嘧啶(T)配对,鸟嘌呤(G)与胞嘧啶(C)配对。A 选项腺嘌呤和鸟嘌呤不配对;B 选项胞嘧啶和胸腺嘧啶不配对。反馈...
What does RNA primase do in DNA replication? What are the base pairing rules for RNA? What are adenine, guanine, cytosine and thymine? Which base is found only in RNA? In a DNA molecule, which of the following does cytosine pair with? a. guanine b. thymine c. adenine d. uracil ...
The nitrogenous base thymine is what type of base? In DNA, the nucleotide guanine binds to ___. (a) thymine (b) adenine (c) uracil (d) cytosine. What are the constituents of DNA and RNA? Which of the following is not correctly matched with its complementary base pair for either DNA...
RNA consists offour nitrogenous bases: adenine, cytosine, uracil, and guanine. Uracil is a pyrimidine that is structurally similar to the thymine, another pyrimidine that is found in DNA. Like thymine, uracil can base-pair with adenine (Figure 2). ...
B. Distribution of RFH sequences across the bacterial tree obtained from Ribosomal Database Project 2 [37]. Bacteria in which RFH sequences were found in the present study are marked with red circles. Note that the absence of red circles does not necessarily indicate the absence of RFH ...
Which RNA base pairs with the adenine in DNA? A. Thymine B. Cytosine C. Both A and B D. Uracil What is a nucleic acid consisting of the nucleotides adenine, guanine, cytosine, and uracil; usually single-stranded, and has functions in protein synthesis, gene reg...
What type of bonding between the A-T and G-C base pairs helps hold the two DNA strands in duplex together? What would happen if the nitrogenous bases were held together by covalent bonds instead of hydrogen bonds? In molecules of DNA, the nitrogenous base guanine will only pair with what...
Each nucleotide constitutes a nucleoside along with a phosphate group. Each nucleoside comprises a nitrogen base which is linked to a pentose sugar. Answer and Explanation: There are 4 nitrogen bases in a DNA. They are "adenine", "guanine", "thymine...
Which one of the following base pairs is found in DNA? a. adenine-uracil b. adenine-guanine c. cytosine-thymine d. guanine-uracil e. adenine-thymine Propose structures for compounds that fit the data: A ketone with M+ = 86 and fragments at m/z = 71 and m/z = 43. What is the ...
What are the base pairing rules of DNA? What base is NOT normally found in a DNA molecule? What does DNA stand for and what are the four bases of DNA? What are the molecular components present in a nucleotide? If you start with one double-stranded DNA molecule and you ...