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: humans consume carbohydrates through foods like bread, pasta, and bananas. carbohydrates are the primary energy source for the human body. some carbohydrates are used to store excess glucose in plant and animal cells. disaccharides are large molecules made of hundreds of repeating units.

Explanation:

1. For "Humans consume carbohydrates through foods like bread, pasta, and bananas": Bread (grains), pasta (grains), and bananas are known sources of carbohydrates (e.g., starch in bread/pasta, sugars in bananas), so this is true.
2. For "Carbohydrates are the primary energy source for the human body": The body breaks down carbs into glucose, which is the main energy source for cells, so this is true.
3. For "Some carbohydrates are used to store excess glucose in plant and animal cells": In plants, starch stores glucose; in animals, glycogen stores glucose, so this is true.
4. For "Disaccharides are large molecules made of hundreds of repeating units": Disaccharides are made of 2 monosaccharide units (e.g., sucrose = glucose + fructose). Polysaccharides (like starch, glycogen) have hundreds of repeating units. So this is false.

So the true statements are the first three.

Answer:

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