3. Which statement(s) correctly describe this disaccharide? CH2OH CH2OH A. It's the alpha anomer, and it's a reducing sugar. CH-O CH-O OH B. It's the alpha anomer, and it's a nonreducing sugar. CH CH CH OH CH C. It's the beta anomer, and it's a reducing sugar. ÓH CH-CH CH-CH D. It's the beta anomer, and it's a nonreducing sugar. HỌ HỌ

CH2OH CH2OH 12. What type of linkage is found in this carbohydrate? CH-O CH—0 Н A. a-1,4 В. В-1,4 CH OH CH CH С. а-1,6 D. B-1,6 ОН СН—СН CH-CH CH2OH ОН E. None of these is correct.

15.

1. At pH 7, the net charge of lysine is A. -2 В. -1 С. О D. +1 Е. +2 2. All 20 amino acids have A. one chiral carbon В. one a-carbon C. one carboxyl group D. ionizable R group E. neutral charge at physiological pH 3. The a helix structure of a polypeptide is maintained by A. peptide bonds B. van der Waal's force C. hydrogen bonds D. ionic bonds E. disulphide bonds 4. Which side chain of the following amino acid is deprotonated at pH 9? A. Methionine B. Alanine C. Isoleucine D. Histidine Е. Тyгosine 5. How many chiral carbons are in the following sugar? А. 1 В. 2 С. 3 D. 4 Е. 5

Part d pls

4. Which molecules represent a non-bonding sugar?

14. Lipids include triglycerides (fats), phospholipids, and waxes. One of the key parts that make up a lipid is glycerol (a type of alcohol). An alcohol is recognizable by its H H H hydroxyl (-OH) groups. H-C-č-ċ a. Draw a box around each OH group. b. The molecularformula for glycerolis C HO Glycerol 15. Another key component of lipids is a fatty acid. A fatty acid is recognizable by its carboxylgroup. Carboxyl -с-о-н group O H H H H-0-C-C-c-C-H butyric acid H H H оннн нн I| I ! I ! ! н-о—с-с-с-с-с-с-н i iii i H H H H H caproic acid оннн н нн H H HHH lauric acid н-о—с-с-с-с-с-с-с-с-с-ҫ-с-с-н H H H H H H H H H H H a. Draw a box around the carboxyl group on each fatty acid. b. The molecular formula for butyric c. The molecular formula for caproic d. The molecular formula for lauric LH acid is C acid is C acid is CO

provide detailed explanation.

12. Peptidoglycan is composed of two monosaccharide units. These are N-acetyl muramic acid and _____.A. β-L-fucoseB. N-acetyl-β-D-glucosamineC. N-acetyl-β-D-galactosamineD. Β-D-galactosamine13. Which polysaccharide is cleaved by beta glucosidases?A. AmyloseB. GlycogenC. InulinD. Cellobiose

1. Why is β-carotene less polar than chlorophyll b? Mention any TWO functional groups which make chlorophyll b more polar than carotene. 2. What is the degree of unsaturation of a β-carotene molecule?