Which of the following are correct regarding carbohydrates? SELECT ALL THAT APPLY They are the preferred energy source of cells. Polysaccharides are long chains of glucose molecules. They are hydrophilic. They contain energy in carbon–carbon bonds.

They are the preferred energy source of cells.

Polysaccharides are long chains of glucose molecules.

They are hydrophilic.

They contain energy in carbon–carbon bonds.

Explanation:

Carbohydrates are one of the four biomolecules found in living systems. They are molecules made up of carbon, hydrogen and oxygen in their structures. A monosaccharide is the simplest unit of a carbohydrate. Carbohydrates are energy sources since they store energy in their chemical bonds i.e. carbon-carbon bonds.

They are preferred as energy sources by cells due to the fact that their stored energy can be released quickly for use by cells i.e. easily broken down compared to lipids.

Polysaccharides (large chains of carbohydrate) such as starch etc. are composed of long chains of monosaccharide units such as glucose. Due to the hyroxyll group in the structure of carbohydrates, they are considered water-loving or hydrophilic.

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.