7. Label the three main parts of a nucleic acid in Figure 3. (b). (a) 0 0 0-P-0-P-O-P-0-CH₂ Figure 3 0 4'CHH C₁' 3¹C-C₂. H HO OH (H) H HO (c) NH₂ CH

2. a) State the three components of nucleic acid. b) List the four nitrogenous bases in nucleic acid.

30. The shown structure is a cyclic D-monosaccharide. Which of the following statements is true? HOCH₂ H OH H OH OH CH₂OH A. The chemical can react with methanol to form a hemiacetal in solution without forming an open chain structure B. The chemical needs to form an open chain structure to be able to react with methanol to produce a glycosidic linkage in solution C. Both A and B D. Neither A nor B

1) Match the nucleotide pictures to their names. A) Cytosine B) Guanine C) Thymine D) Adenine

Penicillin G is a natural antibiotic that is useful for treating infections caused by Gram positive bacteria. What is the functional benefit of the semi-synthetic antimicrobials carbenicillin and ampicillin, generated by chemical modification of the R group so their R groups each are a bit different than the R group seen with penicillin G?

This image shows the tertiary structure of a protein segment. Tertiary structure results from different interactions, or forces, between groups. Move the example of each force to the appropriate description on the protein. Then, identify the major force controlling tertiary structure. (Need help) It says I'm wrong.

3. The following structures are the components of nucleic acid. CH2OH ОН NH2 ОН ОН A (a) Which type of base is the molecule B? (b) Is molecule A be found in DNA or RNA? Explain. (c) Draw a nucleoside using the appropriate structures provided above. While drawing the structure, also consider the conformation. 7 (d)What are the differences between the structure of dATP from the structure vou draw in (c)? (e) Fill in the blanks for the relative percentage of bases in a DNA. А G T 13 15 Strand 1 12 Strand 2

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6. The [a] of cheatalotic acid is + 10°. The structure shown below was thought to be correct. Answer for Part b HO, COOH H, HO OH Cheatalotic Acid Incorrect Structure a) Why is the structure shown incorrect? b) Propose a cture of cheatalotic acid that can possibly be correct, assuming atom connectivity is correc

Which of the numbered bonds in this polypeptide fragment are peptide bond(s)? (Select all that apply!)