STPM Biology - chapter 4 & 5: Revision essay question 1

1. a.       NAD, FAD and NADP are important molecules in plant cells. Describe, in detail, the role of these   
          molecules within a palisade mesophyll cell.                  [7]

Answer:

 

-          NAD/FAD involved in cellular respiration

-          2 molecules of reduced NAD/NADH produce in glycolysis

-          Link reaction producing 1 molecule of reduced NAD/NADH or 2 NADH

-          Krebs cycle produces 3 reduced NAD (per turn of cycle)/6NADH

-          Krebs cycle produces 1 reduced FAD (per turn of cycle)/2FADH2

-          Carries/transfers, hydrogen to inner mitochondrial membrane/cristae/cytochromes/ETC

-          Mitochondrial shuttle (bringing) NAD reduced from glycolysis into matrix

-          NADP involved in photosynthesis

-          NADPH produced in non-cyclic (photo) phosphorylation

-          Hydrogen and electrons comes from photolysis water

-          NADPH used in Calvin cycle/light independent stage/NADPH use in reduction of CO2

-          Forming triose phosphate and subsequently carbohydrate, protein