Question

where is glycogen primarily stored in the body?
a. stomach and intestines
b. brain and heart
c. liver and muscles
d. skin and bones

what category of carbohydrates includes glucose, fructose, and galactose?
a. oligosaccharides
b. polysaccharides
c. monosaccharides
d. disaccharides

which carbohydrate serves as the primary energy source for cells?
a. lactose
b. fructose
c. glucose
d. sucrose

Explanation:

First Question:

Glycogen is a polysaccharide used for energy storage. The liver stores glycogen to maintain blood glucose levels, and muscles store it for their own energy needs. Stomach/intestines, brain/heart, and skin/bones are not primary glycogen storage sites.

Carbohydrates are classified into monosaccharides (single sugar units), disaccharides (two sugar units), oligosaccharides (a few sugar units), and polysaccharides (many sugar units). Glucose, fructose, and galactose are single sugar units, so they are monosaccharides.

Glucose is the primary energy source for cells. Cells can metabolize glucose through processes like glycolysis and cellular respiration to produce ATP. Lactose, fructose, and sucrose need to be broken down or converted before being used as energy, while glucose is directly utilized.

Answer:

c. Liver and muscles

Second Question: