The following pentasaccharide is found in a chondroitin b hy

The following pentasaccharide is found in a. chondroitin b. hyaluronan (hyaluronic acid). c. chitin d cellulose e. heparin Which of the following is an allosteric effector of pbosphofructokinase-1? a. glucose-6-phosphate b. glucose-1-phosphate c. pyruvate d. citrate e. fructose-2, 6-bisphosphate. An appropriate name for this compound is a. aldotriose. b. an enantiomer of glyceraldehydes-3-phosphate c. triose d. dihydroxyacetone. e. c and d are correct. The reaction 1, 3-bisphosphoglycerate rightarrow 2, 3-bisphosphoglycerate is catalyzed by a. bisphosphoglycerate phosphatase b. bisphosphoglycerate mutase. c. 2, 3-bisphosphoglycerate synthase d. 3-phosphogfycerate isomerase e. 1, 3-bisphosphoglycerate hydrolase Mutases are a subclass of isomerases that catalyze a. the change of phosphate positions within a substrate molecule b. phosphorylation from ATP. c. hydrolysis of a phosphate ester.

Solution

Answer to Question 12 is :- a) Chondroitin

Answer to Question 13 is :- d) Citrate.(Citrate basically acts as inhibitor. Increased concentration of citrate indicates that the cell has sufficient energy store, hence inhibition by citrate on the allosteric site of Phosphofructokinase occurs)

Answer to Question 14 is :- e) c and d are correct. (Since it is a 3-carbon carbohydrate, it is a Triose. And there is a ketone group in the middle carbon, as acetone and with two hydroxyl groups at the two terminal carbons, hence dihydroxyacetone)

Answer to Question 15 is :- b) Bisphosphoglycerate mutase (Mutases are isomerases, which catalyze the shift of functional groups, mainly phosphates, from one position to another in a substrate molecule)

Answer to Question 16 is :- a) Change of phosphate positions within a substrate molecule.