biology help with explaination please

Question

Glucose diffuses very slowly through artificial phospholipid bilayers. The cell lining the small intestine, however, rapidly move large quantities of glucose, from outside the cells, to their glucose-poor cytoplasm. Using this information, which transport mechanism is most probably functionaning in the intestinal cells.

 

A simple diffusion

b facilitated diffusion

c active transport pumps

d exocytosis

 

One carbon dioxide molecule reacts in each turn of the Calvin cycle. __ turns are required for the net gain of one glyceraldehyde 3-phosphate molecule, using a total of __ ATP and __ NADPH.

 

a 3,6,9

b. 3,9,6

c. 6.12.18

d. 6.18.12

Answer 1

For glucose it is facilitated diffusion, glucose molecules are unable to be absorbed by intestinal cell membranes due to their large size. They are absorbed by facilitated diffusion along with the concentration gradient of other molecules. Secondary active transport helps in glucose absorption by cell layer lining small intestine.  

 

Hope this helps. 

 

I shall answer Calvin cycle question later on.