Water activity is defined as “at a given temperature, the ratio of the equilibrium partial vapor pressure of water in the system (pw) to the equilibrium partial vapor pressure of pure liquid water (pow) at the same temperature.”

The bound angle between the two hydrogen atoms is ___________ in liquid water.

Turgor pressure is the pressure that water-filled vacuoles exert on the plasma membrane and the partially elastic cell wall.

Exoenzymes such as α-amylase act anywhere on the starch chain and undamaged starch grains to degrade starch.

During cooking, the cell membrane maintains permeability, and the cell maintains its shape. 

Which of the following statement about water is INCORRECT?

Which of the following bonds have the strongest strength?

Amylopectin is made of glucose molecules linked together by linkage(s): __________.

Pectic substances are considered as linear polymers of D-galacturonic acid joined by ________ glycosidic linkages.

The glycemic index for pure glucose is __________.