chapter 4 online mastering biology

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Most organic compounds contain carbon and _____.

Hydrogen -In fact, some argue that carbon dioxide should not be considered an organic molecule because it does not contain hydrogen.

Variations in the reactive properties of different organic molecules are most closely associated with _____

the presence or absence of functional groups

Citric acid makes lemons taste sour. Which of the following is a functional group that would cause a molecule such as citric acid to be acidic?

carboxyl

Which of the following is a hydrocarbon?

C3H8 This is a typical hydrocarbon with single covalent bonds; the number of hydrogen atoms is equal to two times the number of carbon atoms plus 2.

How do isomers differ from one another?

Isomers differ in the arrangement or bonding of atoms.

The large diversity of shapes of biological molecules is possible because of the extensive presence of _____ in the molecules

carbon

Molecules that have the same chemical formula (same numbers of each atom) but different three-dimensional shapes are called _____.

isomers

What functional group is commonly used in cells to transfer energy from one organic molecule to another

phosphate


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