Question

000000 5. Some bacteria make an enzyme that can convert dihydroxyacetone to dihydroxyacetone phosphate (DHAP). How would this help these cells yield energy? Hint: look at the diagram of glycolysis to the right Glucose Ister Unstable 0000000- Fructose-1,6-bisphosphat DHAP glyceroldehyde- • 3-phosphate - -- - - - - - All the DHAP MAD, will be converted into gyaraldehyde RAM 3-phosphate ADP Happens Pyruvate 6. If a cell respiring on glucose runs out of oxygen and/or other electron acceptors, what happens to the electrons transferred from the catabolic substrates?

Answer 1

solution

Que 5 answer

The conversion of dihydroxy acetone phosphate (DHAP) into glyceraldehyde 3 phosphate results into the production of 2 time more ATP and NADH.

for each G3P breakdown there is synthesis of 2 ATP and one NADH.so from one glucose molecule 2 G3P are synthesized to produce 4 ATP and 2 NADH(equivalent to 6 ATP)

Total 10 ATP are synthesized in glycolysis and 2 are used at initiwl stage of glycolysis.

Que 6 answer

When oxygen is absent in respiration then the cells may use other, simpler pathways to regenerate NAD+

In these pathways, NADH donates its electrons to an electron acceptor molecule in a reaction that doesn’t make ATP but it can regenerate NAD+ .

The final electron acceptor is pyruvate in lactic acid fermentation while acetaldehyde in alcohol fermentation.

so glycolysis can continue, such process is called as fermentation.