题目内容

All living organisms have common organic compounds that perform many of life's functions. All organic compounds are made of atoms and elements. Select all of the elements that are common to all living organisms?

A. Helium
B. Calcium
C. Hydrogen
D. Carbon
E. Potassium
F. Oxygen
G. Phosphorus
H. Nitrogen

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Organic chemistry is the study of carbon compounts and it encompasses all molecules that contain carbon. The nature of the carbon atom allows it to form a wide variety of molecules, from very simple ones like methanol that contains just a single carbon to incredibly complex molecules like phospholipids that form chains that can be over 20 carbons long. What type of bond does carbon most commonly form with other atoms?

A. ionic bonds
B. hydrogen bonds
C. carbon bonds
D. covalent bonds

Major components of organic compounds such as fats, phospholipids and fossil fuels consist of hydrocarbons. Hydrocarbons are molecules that are made of

A. hydrogen and carbon atoms.
B. hydrogen, oxygen and carbon atoms.
C. water molecules and carbon atoms.
D. hydrogen, carbon and nitrogen atoms.

Which of the following is the correct functional group for alcohols?

A. -COOH
B. -CH3
C. -OH
D. -SH

Isomers have the ____ chemical formula, _____ chemical structures and _____ biological functions.

A. different, different, same
B. same, different, different
C. same, different, same
D. different, same, same

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