Question

Question 1 (1 point) Which of the following best describes glycogen? Question 3 (1 point) All the protease mechanisms we discussed in class involved formation of a covalent acyl enzyme intermediate. O Alinear polymer of glucose joined by a(1,6) linkages. True False O A polymer of glucose joined by a(1,4) linkages with a(1,6) linkages every 5-10 residues. Question 4 (1 point) O A polymer of glucose joined by B(1,4) linkages with a(1,6) linkages every 5-10 residues. In the mechanism of chymotrypsin, which of the following amino acids found in the active site is correctly defined in terms of its role in the reaction? aspartic acid: electrostatic stabilization of histidine to make a stronger base O Alinear polymer of glucose joined by B(1,4) linkages. histidine: deprotonates aspartic acid to allow a nucleophilic attack to occur O A random polymer of glucose molecules joined at every possible OH group. cysteine: performs a nucleophilic attack on the carbonyl carbon of the substrate serine: hydrogen bonds with carbonyl oxygen to withdraw electron density from the substrate Question 2 (1 point) Which of the following best completes this sentence? Fructose can cyclize to... Question 5 (1 point) An aldehyde and alcohol can react to form a only a pyranose Ohemiacetal O only a furanose O acetal both a furanose or a pyranose Oester fructose does not cyclize O aldol

Answer 1

0.1 > Answer: 6 Most of glucose residues in glycogen are linked by a 1,4 glycosidic bond Branches an tenth residue are created by x-1,6-glycosidic bonds. option (a) glucose polymer units in glycogen are bonded with &(14) glycosidic bonds. Option @ is wrong answer. (6 Correct option. 6 B4, 4) linkage is not present (Wrong). (d) B (1,4) linkage is not present (Wrong (e) Not possible tortor) group & only at 5th 10th residue not rondom, Option (e) is also wrong answer. 0.2 Answer : ③ Both pyranose Furanose frictose can be cyclize to both heranose or o pyrenose By the process of intermolececlar hemiketal it shows both streecteere by which the furanose is more stable. CH₂-OH HO-Ctte o CH OH Ho-CH H-C-0H / HVOH H-c oH OH H CH₂OH - Puranose- Here Hydroxyl from C-6 attacks the Carbonyl group, results in pyrenose. LOR is represent one compound one time.

0.3 Answer! @ Ioue - Function of protease -enzeme is to hydrolyze-peptide bond, which includes N-terminal clevage proceed remains covalently bounded to the protease which also known as acuta enzelme intermediate so it is a true statement. 0.4 Answer: @ Serine. Chymotrypsin, a protease is on enzyme mechanisum that cleves the carbong side of certain peptide by both genea acid-base catalyst - Acylation " Acyl-enzyme Deacylation Home R H2O This mechanism is observed in serine protease because in this strechere Catalyze of peptide bonds on the carboxyl group is takes place As per option d Serine & Hydrogen bonds with carbonyl oxua en to withdraw electron densite from the substrate

o.s) Answer: 6 Acetal Aldehydes reacts with two moles of Alcohol to give Acetal - OH RECOH & ROH Roc-OR+ROHT Hemiacetal ORG Roc-ORO Acetal - final product. Hemiacetal is intermediate R & R may be same alkanes. prodieet or different