Carbs

Scientists have found geysers on one of Saturn’s moons. The geysers release water vapor containing complex organic compounds, which may indicate the presence of life. Which of the following elements is most likely abundant in the organic compounds in the water vapor?

• carbon

• chlorine

• iron

• zinc

Which of the following is the main reason that humans need to include carbohydrates in their diet?

• Carbohydrates are broken down in cells for energy.

• Carbohydrates combine to form many different proteins.

• Carbohydrates act as catalyst to speed up chemical reactions.

• Carbohydrates are the building blocks for cell growth and repair.

Monosaccharides are monomers of

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

A polymer of alpha-D-glucose found in plants has mostly 1,4 linkages and some 1,6 linkages. Which molecule fits this description?

• glycogen

• cellulose

• amylose

• amylopectin

Which molecule is a sugar?

• 
• 
• 
• 

What molecule is a polysaccharide?

• glucagon

• glycose

• glycerol

• glycogen

Which substance is used for structure in plants?

• amylopectin

• cellulose

• collagen

• starch

What atoms make up all carbohydrates?

• Carbon, Sulfur, Hydrogen
• Carbon, Oxygen, Phosphorus
• Carbon, Oxygen, Nitrogen
• Carbon, Oxygen, Hydrogen

How many sugar units make up monosaccharides?

• one
• two
• three
• zero

How many sugar units make up disaccharides?

• one
• two
• three
• zero