Carbohydrates

What elements make up carbohydrates, usually in a ratio of 1:2:1?

• calcium, hydrogen, oxygen

• nitrogen, hydrogen, oxygen

• carbon, hydrogen, oxygen

• oxygen, carbon, phosphorus

What element is this?

• hydrogen

• oxygen

• carbon

• sulfur

Carbon has _______ valence electrons, allowing it to bond with many other elements.

• 2

• 4

• 6

• 8

Plants make this monosaccharide, a product of photosynthesis.

• cellulose

• glucose

• lactose

• sucrose

Carbs function to provide structure (like in plant cell walls) as well as:

• insulation

• genetic information storage

• quick energy

• chemical messengers

What disaccharide is made of glucose and galactose?

• sucrose

• lactose

• fructose

• maltose

The chemical combination of glucose and fructose, forms ______________ also known as table sugar.

• sucrose

• lactose

• maltose

• galactose

Wood from trees is made mostly of ______________________.

• glucose

• fructose

• starch

• cellulose

____________________ is the main sugar found in honey.

• Sucrose

• Glucose

• Cellulose

• Fructose

Five-carbon sugars like ribose and deoxyribose (found in RNA and DNA), are examples of _____________.

• trioses

• pentoses

• hexoses

• quintoses