BioChem Unit 2 Review

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

• organic compounds

• made of amino acids

• parts of genes

• made of simple sugars

Which group consists entirely of organic molecules?

• protein, oxygen, fat

• water, carbon dioxide, oxygen

• protein, starch, fat

• water, starch, protein

Which statement describes a similarity between all enzymes, antibodies, and hormones?

• Their chemical structure is critical to their ability to function.

• Their ability to replicate identical copies ensures continuation of the species.

• They work better at 100°C than 37°C.

• They are made by and carried by the blood.

Which substance is an inorganic molecule?

• startch

• DNA

• water

• fat

Most organisms contain

• organic compounds, only

• inorganic compounds, only

• both organic and inorganic compounds

• neither organic nor inorganic compounds

Water is classified as an inorganic compound because it

• does not contain carbon

• contains hydrogen

• does not contain nitrogen

• contains oxygen

Which compound is inorganic?

• glucose (C₆H_l2O₆)

• ethane (C₂H₆)

• carbon dioxide (CO₂)

• stearic acid (C_l8H₃₆O₂)

The chart below indicates the elements contained in four different molecules and the number of atoms of each element in those molecules. Which molecule can be classified as organic?

• A

• B

• C

• D

Many disorders are due to the inability of an individual to break down a particular chemical. Sometimes these disorders can be treated by giving the affected individual the appropriate

• enzymes

• antigens

• chromosomes

• organelles

A fully functioning enzyme molecule is arranged in a complex three-dimensional shape. This shape determines the

• specific type of molecule it interacts with during a reaction

• rate at which the enzyme breaks down during a reaction it regulates

• pH of all body systems

• temperature of the products of the reaction it regulates