Biochemistry

Proteins, starch, and DNA are similar in that they are all

• organic compounds
• parts of genes
• made of amino acids
• made of simple sugars

Which substance is an inorganic molecule?

• starch
• DNA
• carbon dioxide
• fat

The diagram shown represents a biological process:

Which set of molecules is best represented by letters A and B? (Think Photosynthesis)

• A: oxygen and water
  B: glucose
• A: glucose
  B: carbon dioxide and water
• A: carbon dioxide and water
  B: glucose
• A: glucose
  B: oxygen and water

In a chemical analysis of a sample of animal tissue, which element would most likely be found in the smallest quantity?

• carbon
• oxygen
• hydrogen
• nitrogen

A chemical analysis of organisms from each kingdom shows that living things are primarily composed of the elements

• carbon, hydrogen, chlorine, and sulfur
• carbon, hydrogen, oxygen, and nitrogen
• iron, calcium, hydrogen, and oxygen
• chlorine, carbon, calcium, and sulfur
  

Which elements are present in all organic compounds?

• hydrogen and oxygen
• nitrogen and oxygen
• nitrogen and carbon
• hydrogen and carbon
  

Which substance plays a major role breaking bonds to create ENERGY for major reactions in the body?

• water
• glycogen
• glucose
• glycerol

Base your answer on the diagram and on your knowledge of biology. The diagram represents a portion of a starch molecule.
The building blocks for this molecule are

• amino acids
• simple sugars
• fatty acids
• molecular bases

Some structural formulas of organic molecules are shown in the diagram.
Which structures represent carbohydrates?

• 1 and 5
• 2 and 4
• 3 and 2
• 1 and 2

Which compound is a monosaccharide?

• sucrose
• maltase
• ribose
• starch