In polynucleotides, the phosphodiester bond is between the ______. a 3’ OH from the 3’ end, and 5’ OH from the 5’ end b 3’ OH from the 5’ end, and 4’ OH from the 3’ end c 3’ OH from the 5’ end, and 5’ OH from the 3’ end d 3’ OH from the 3’ end, and 4’ OH from the 5’ end
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In polynucleotides, the phosphodiester bond is between the ______.
| a |
3’ OH from the 3’ end, and 5’ OH from the 5’ end |
|
| b |
3’ OH from the 5’ end, and 4’ OH from the 3’ end |
|
| c |
3’ OH from the 5’ end, and 5’ OH from the 3’ end |
|
| d |
3’ OH from the 3’ end, and 4’ OH from the 5’ end |
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- In the DNA structure, a purine molecule always binds with a pyrimidine molecule. How would you expect the structure to differ if Adenine forms base pairing with Guanine and Cytosine forms base pairing with Thymidine? Instead of A-T, G-C; can it be A-G, C-T? Justify your answer within five sentencesWhy do think nucleotides are also sometimes referred to as “bases” or “nucleotide bases”? What is the difference between a nucleotide and a nucleoside? Explain by giving an example, using structures. What kind of bond links a base to some sugar? Is the sugar an alpha or beta anomer? In what position(s) of the sugar does this occur? In what position(s) of the base does this occur? Instead of the term “Formation of a nucleoside”, what could the name of the reaction be? What functional group is being formed? Define the primary structure of DNA/RNA. Compare and contrast to the primary structure of proteins.Which of the following descriptions best describes the composition of nucleotides? Group of answer choices A. a pentose sugar and a purine or pyrimidine B. a nitrogenous base, a phosphate group, and a pentose sugar C. a nitrogenous base and a pentose sugar D. a nitrogenous base and a phosphate group E. a phosphate group and an adenine or uracil
- A researcher is studying the effect of pH on a nucleic acid assuming it is DNA.She adds the nucleic acid in a tube labeled pH = 13. Sometime later when sheexamines the structure, she sees broken strands with cyclic structures formed involving phosphate group. a. (question) Do you agree that the nucleic acid is DNA? Why or why not?Which base is at the 3' end of the structure shown? A.) A B.) C C.) G D.) T E.) UDirectionality of Polynucleotide chains originates at the ____ end, and terminates at the _____ end. a 3’ OH; 5’ Phosphate b 5’ OH; 3’ Phosphate c 5’ Phosphate; 3’ OH d 3’ Phosphate; 5’ OH
- Which one bracketed region most likely illustrates a phosphodiester bond in Figure 1? The bracketed region marked ‘i’, from phosphate group to phosphate group. The bracketed region marked ‘j’, from methyl group to methyl group. The bracketed region marked ‘k’, from 3’ carbon to 5’ carbon. None of the above and I have explained my reasoning here.Draw and label the dinucleotide AT as follows: A. 5’ and 3’ ends B. Phosphodiester bond C. N-glycosidic bondsWhat type of bond is formed between the nucleotide monomers that is considered as the main stabilizing factor of primary structure of nucleic acid? A. Phosphodiester bond B. Glycosidic bond C. Nitrogen bond D. Hydrogen bond
- True / False: β-bends can link together α-helices and β-sheets.Moving from 3’ to 5’ along the sugar phosphate backbone of a single strand of nucleic acid, the atoms encountered, in order, would be: A. O, C, C, P, P, C, O B. O, C, C, C, O, P, O C. P, O, C, C, O, C, P D. O, P, P, C, C, O, P E. O, C, C, C, P, O, CAbove is a nucleotide. Question 5.1 nucleotide 2 Q5.1 nucleotide 2 Is this nucleotide from: Choice 1 of 5:a peptide Choice 2 of 5:a carbohydrate Choice 3 of 5:a lipid Choice 4 of 5:DNAChoice 5 of 5:RNA Question 5.2 nucleotide 3 How many carbons does it contain? 15 7 10 Question 5.3 nucleotide 4 Which base is this? A T G C