Biochem Quiz

What is an atom?

• smallest unit of matter that cannot be broken down by chemical means

• A pure substance made of only one kind of atom

• A substance made up of atoms of two or more different elements joined by chemical bonds

• An atom or group of atoms that has a positive or negative charge.

What is cohesion

• An attraction between molecules of different substances

• an attraction between molecules of the same substance

What is an acid?

• compound that forms hydrogen ions (H+) in solution

• a compound that produces hydroxide ions (OH-) in solution

• A solution that minimizes changes in pH when extraneous acids or bases are added to the solution.

What is a carbohydrate?

• a complex organic substance present in living cells, especially DNA or RNA, whose molecules consist of many nucleotides linked in a long chain.

• An organic compound that is made of one or more chains of amino acids and that is a principal component of all cells

• compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body

• Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen.

What is a protein?

• a complex organic substance present in living cells, especially DNA or RNA, whose molecules consist of many nucleotides linked in a long chain.

• An organic compound that is made of one or more chains of amino acids and that is a principal component of all cells

• compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body

• Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen.

What is a nucleic acid?

• a complex organic substance present in living cells, especially DNA or RNA, whose molecules consist of many nucleotides linked in a long chain.

• An organic compound that is made of one or more chains of amino acids and that is a principal component of all cells

• compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body

• Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen.

What is a lipid?

• a complex organic substance present in living cells, especially DNA or RNA, whose molecules consist of many nucleotides linked in a long chain.

• An organic compound that is made of one or more chains of amino acids and that is a principal component of all cells

• compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body

• Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen.

Which of the following are carbohydrates?

• sucrose

• sucrase

• cholesterol

• glycogen

• glycerol

Which of the following proteins is an enzyme?

• chlorophyll

• sucrase

• hemoglobin

• maltase

• testosterone

What is the name for the part of an enzyme where the reactant fits?

• construction site

• destruction site

• active site

• inactive site