2. Cellulosic Biofuels are fuels that are produced by fermentation of cellulose containing materials (wood, leaves, paper, etc.)
by yeast. what would be necessary before yeast cells are capable of fermenting sugars from cellulose? (Hint: consider the similarities between lactose and cellulose?)
The answer is hydrolysis. This can be achieved through the use
of a strong acid or cellulolytic enzymes (from fungi) that are capable of converting
the cellulose to fermentable sugars. This pretreatment hydrolyzes the β-1,
4-glycosidic linkages of cellulose subunits.
Gas exchange occurs at the alveoli in the lungs and takes place by diffusion. The alveoli are surrounded by capillaries so oxygen and carbon dioxide diffuse between the air in the alveoli and the blood in the capillaries.
The skin helps in the cooling of the body,when there is exess temperature in the body,the skin reduce it and changes it in the form of sweat and also skin acts as a passage of the sweats.
