#Question id: 10275
#Unit 6. System Physiology – Plant
In the initial phase of glycolysis, each hexose unit is phosphorylated twice and then split, producing two molecules of triose phosphate, in these reactions included irreversible reaction. How much irreversible reaction is performed in the glycolytic pathway through in this series of reactions?
#Question id: 10276
#Unit 6. System Physiology – Plant
In glycolysis, the enzyme glyceraldehyde 3-phosphate dehydrogenase catalyzes;
#Question id: 10277
#Unit 6. System Physiology – Plant
Each of the nine glycolytic intermediates between glucose and pyruvate is phosphorylated. The phosphoryl groups seem to have many functions such as,
a) The plasma membrane generally lacks transporters for phosphorylated sugars, the phosphorylated glycolytic intermediates cannot leave the cell
b) After the initial phosphorylation, further energy is necessary to retain phosphorylated intermediates in the cell, despite the large difference in their intracellular and extracellular concentrations
c) Phosphoryl groups are essential components in the enzymatic conservation of metabolic energy, Energy released in the breakage of phosphoanhydride bonds is partially conserved in the formation of phosphate esters such as glucose 6-phosphate
d) Binding energy resulting from the binding of phosphate groups to the active sites of enzymes lowers the activation energy and increases the specificity of the enzymatic reactions
which of the following functions shows Importance of Phosphorylated Intermediates?
#Question id: 10278
#Unit 6. System Physiology – Plant
The type of ATP synthesis, traditionally referred to as substrate-level phosphorylation involves the direct transfer of a phosphate group, which reactions perform substrate-level phosphorylation?
a) Conversion of Glyceraldehyde 3-phosphate to 1,3-Bisphosphoglycerate
b) Conversion of Phosphoenol pyruvate to pyruvate
c) Conversion of Fructose 6-phosphate to Fructose 1,6-bisphosphate
d) Conversion of 1,3-Bisphosphoglycerate to 3-Phosphoglycerate
Find the correct one.
#Question id: 10279
#Unit 6. System Physiology – Plant
Phosphohexose isomerase is one of the enzyme of glycolysis which catalyzes Glucose 6-phosphate to Fructose 6-phosphate, enzyme bind with the hexose in their active site by opening the structure. The ring opening and closing reactions are catalyzed by an active-site present amino acid such as
#Question id: 10280
#Unit 6. System Physiology – Plant
The enzyme of glycolytic pathway that forms fructose 1,6-bisphosphate is called phosphofructokinase-1 (PFK-1), which statements can’t distinguish it from a second enzyme (PFK-2) Phosphofructokinase-2.