Carbohydrates are a type of biological macromolecule required to carry out life functions. Which of the following is NOT true regarding carbohydrates?

A. Monomers of starch are sugars such as glucose.

B. Living things store extra sugars as complex carbohydrates.

C. They contain carbon, hydrogen and oxygen, usually in the ratio of 1:2:1.

D. Carbohydrates are the main component that makes up cell membranes

The main component of the cell membrane is a double layer of phospholipids - molecules with a phosphate head and fatty acid tail. Therefore D is incorrect. There are some carbohydrates in the cell membrane, but they are not the main component.

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luisvaschetto luisvaschetto · Answer 2 · 2021-12-03T11:29:09+01:00

The statement 'carbohydrates are the main component that makes up cell membranes' is NOT true (Option D).

Carbohydrates are biopolymers composed of monosaccharide units linked by glycosidic bonds.

Complex carbohydrates (e.g., starch) consist of large branched or unbranched chains of monosaccharides, while simple carbohydrates (e.g., glucose) are monosaccharides.

Complex carbohydrates serve as sources of longer energy storage for the cells, while monosaccharides provide energy quickly.

The main component of the cell membranes are lipids (i.e., phospholipids and cholesterol).

In conclusion, the statement 'carbohydrates are the main component that makes up cell membranes' is NOT true (Option D).

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