Which functional groups are present? Select all that apply -Carboxyl group -Amino group -Phosphate group -Methyl group -Hydroxyl group

What are the structural differences between bilirubin and urobilin? (Select all that apply.) O Ring is opened in the first compound, but is not in the second compound. Several methylene bridges are reduced in the second compound. O Iron atom is absent in the second compound, but is present in the first compound. The central methylene bridge is reduced in the second compound, but is not in the first compound. O Ring is opened in the second compound, but is not in the first compound. Some vinyl groups are reduced into ethyl groups in the second compound. The central methylene bridge is oxidised in the second compound, but is not in the first compound. O Some vinyl groups are reduced into ethyl groups in the first compound.

What is the systematic name of the cyclic monosaccharide shown here? Be sure to include the structural form as a component of the name. H OH CH₂OH H OH H H OH B-D-glucopyranoside B-D-glucopyranose B-D-glucofuranose Previous Page B-D-glucofuranoside OH -I H Next Page Page 10 of 25

why does A2-B3 structure is active (contain the antibiotic) and the (A2- B2,A1-B1,A1-B2,A1-B3,A3-B1,A3-B2,A3- B3) are nonactive help please! atorial proce below. A1 A2 A3 N=0 H 2-nitrobenzaldehyde 5-nitro-2-furaldehyde 3-nitrobenzaldehyde B1 B2 NH₂ HN. 4-bromophenylhydrazine hydrochloride B3 NH₂ Br HN. 4-cyanophenylhydrazine hydrochloride NH₂ HN CẠNH NH₂ aminoguanidine bicarbonate

19. (a) Use Figure 1 to draw the cyclic ẞ-form of the monosaccharide shown below. CHO CH₂OH HO-CH HO-C-H H-C-OH H-C-OH CH₂OH H Z Figure 1 (b) Draw the enantiomer of the monosaccharide shown below. Is the enantiomer a D-sugar or an L-sugar? CHO HO–CH H-C-OH HO-C—H H-C-OH CH₂OH

Please be clear in your explanations. This is a practice assignment for an upcoming exam and I'm trying to learn everything.