Answer:
B,D,A,C,E
Explanation:
The first five steps of glycolysis are explained below:
<u>Step -1 :</u>The food we eat contains glucose which is converted to glucose-6-phosphate in the presence of enzyme <u>hexokinase/ glucokinase</u>. One ATP molecule is consumed in this step.
<u>Step-2:</u> Glucose-6- phosphate is converted to fructose-6- phosphate by the action of enzyme <u>Phosphoglucose isomerase</u>.
<u>Step-3:</u> Fructose-6- phosphate is converted to fructose-1,6-biphosphate in the presence of enzyme <u>phosphofructokinase-1 (PFK-1)</u> . One more ATP molecule is consumed in this step.
<u>Step-4:</u> Fructose 1,6-bisphosphate in the presence of <u>fructose-bisphosphate aldolase</u> is converted to D-glyceraldehyde 3-phosphate (GADP) and dihydroxyacetone phosphate (DHAP)
<u>Step-5:</u> Dihydroxyacetone phosphate (DHAP) in the presence of <u>triosephosphate isomerase (TPI)</u> is converted to D-glyceraldehyde 3-phosphate (GADP).
Hence, the order it follows is:
B. hexokinase / glucokinase
D. Phosphoglucoisomerase
A. Phosphofructokinase-1 (PFK-1)
C. fructose bisphosphate aldolase
E. triose phosphate isomerase (TPI)
<u>The trend is : B,D,A,C,E</u>