Anatomy & Physiology

Anatomy & Physiology Study Guide

5.11 Chapter Five Practice Exam 1. Isotopes of an element differ from each other in the number of __________________. a. Protons in the nucleus b. Neutrons in the nucleus c. Electrons in the outer shells d. A, B, and C are all correct 2. The number and arrangement of electrons in an atom’s outer energy level determines the atom’s _____________________. a. Atomic weight b. Atomic number c. Molecular weight d. Chemical properties 3. All organic compounds in the human body contain all of the following elements except _____________________. a. Hydrogen b. Oxygen c. Carbon d. Calcium 4. A substance containing atoms of different elements that are bonded together is called a(n) __________________. a. Molecule b. Compound c. Mixture d. Isotope 5. All the chemical reactions that occur in the human body are collectively referred to as _____________________. a.

6. Which of the following equations illustrates a typical decomposition reaction? a. A + B → AB b. AB + CD → AD + CB c. 2A 2 + B 2 → 2A 2 B d. AB → A + B 7. The speed, or rate, of a chemical reaction is influenced by _______________. a. The presence of catalysts b. The temperature c. The concentration of the reactants d. A, B, and C are all correct 8. Chemical reactions in the human body are controlled by special catalytic molecules called _____________________. a. Enzymes b. Cytozymes c. Cofactors d. Activators 9. Which the following is not a function of a protein? a. Support b. Transport c. Metabolic regulation d. Storage of genetic information 10. Complementary base pairing in DNA includes the pairs _____________________. a. Adenine–uracil and cytosine–guanine b. Adenine–thymine and cytosine– guanine c. Adenine–guanine and cytosine– thymine d. Guanine–uracil and cytosine–thymine Answer key found on page 366.

Anabolism b. Catabolism c. Metabolism d. Homeostasis

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