Question

carbohydrates are biological molecules made of carbon, hydrogen, and oxygen. there are different types of carbohydrate molecules, each with unique functions in living things. select the true statements. disaccharides are large molecules made of hundreds of repeating units. carbohydrates are the primary energy source for the human body. humans consume carbohydrates through foods like bread, pasta, and bananas. some carbohydrates are used to store excess glucose in plant and animal cells. submit

Explanation:

1. Analyze "Disaccharides are large molecules made of hundreds of repeating units": Disaccharides are formed from two monosaccharides, while polysaccharides (like starch, glycogen) have hundreds of repeating units. So this statement is false.
2. Analyze "Carbohydrates are the primary energy source for the human body": Glucose (a carbohydrate) is the main energy source for cells, so this is true.
3. Analyze "Humans consume carbohydrates through foods like bread, pasta, and bananas": Bread (grains), pasta (grains), and bananas are rich in carbs (starch, sugars), so this is true.
4. Analyze "Some carbohydrates are used to store excess glucose in plant and animal cells": Plants store glucose as starch, animals as glycogen, so this is true.

Answer:

The true statements are:

• Carbohydrates are the primary energy source for the human body.
• Humans consume carbohydrates through foods like bread, pasta, and bananas.
• Some carbohydrates are used to store excess glucose in plant and animal cells.

(Note: The statement about disaccharides is false as disaccharides have 2 repeating units, not hundreds.)