Anatomy Ch. 2 Practice Test
Which of the following is NOT true of carbohydrates? Carbohydrates are the primary energy molecules for most living things. Disaccharides are a type of carbohydrate. Glucose in an example of a carbohydrate. An example of a polysaccharide found in plants is starch. A glucose molecule is a polysaccharide stored by the liver.
A glucose molecule is a polysaccharide stored by the liver.
What is the name of the high energy compound the body uses to do work?
ATP
If the DNA molecule resembles a twisted ladder, which chemical units form the sides of the ladder?
Alternating deoxyribose sugar and phosphate groups
The nucleus of an atom is the location of which kinds of subatomic particles?
Neutrons and protons
_______ changes do not alter the basic nature of a substance.
Physical
Which of the following is NOT true about proteins? Fibrous proteins are also called structural proteins and appear most often in body structures. Proteins account for about 10 percent of the organic matter in the body. The building blocks of proteins are amino acids. Globular proteins that play crucial roles in virtually all biological processes are also called functional proteins. Amino acid chains containing fewer than 50 amino acids are called polypeptides.
Proteins account for about 10 percent of the organic matter in the body.
Solution A has a pH of 4. Solution B has a pH of 13. Identify the correct statement.
Solution A is more acidic than solution B (Solution A has more hydrogen ions).
Which of the following statements regarding isotopes is TRUE? Isotopes have the same number of protons and neutrons, but vary in the number of electrons they contain. Isotopes of an element have the same atomic number, but have different atomic masses. The chemical properties of ALL of an element's isotopes are EXACTLY the same. The atomic weight of any element is approximately equal to the mass number of its most abundant isotope. The second, third, and fourth answers are correct. All of the statements are true regarding isotopes.
The second, third, and fourth answers are correct
Which of the following accurately describes enzymes?
They are organic catalysts
Nucleotides, the building blocks of nucleic acids, are made up of _______.
a nitrogen-containing base, a pentose sugar, and a phosphate group
Proteins are made up of many _______.
amino acid molecules
Chemicals in the body that help control the body's pH are called _______.
buffers
The four elements that make up about 96% of body matter are _______.
carbon, hydrogen, oxygen, and nitrogen
A bond that occurs when electrons are shared is a _______ bond.
covalent
Glycogen → glucose is an example of which pattern of chemical reaction?
decomposition reaction
The term "_______" refers to a unique substance that cannot be decomposed or broken down into simpler substances.
element
Substances that cannot be broken down into smaller compounds are _______.
elements
If neutral atoms become positive ions, they _______.
lose electrons
When you ride a bike, the body converts chemical energy to _______ energy to move the limbs necessary to turn the pedals.
mechanical
Which of the following body processes utilize(s) biochemicals?
movement, thinking, and digestion
What bonds are formed when electrons are shared equally?
non-polar covalent
The only electrons that are important when considering bonding behavior are those in the _______ shell. This shell is called the _______ shell.
outermost; valence
Protons carry a _______ charge and electrons carry a _______ charge.
positive, negative
Antibodies, enzymes, and some hormones are all examples of which class of macromolecules?
proteins
The atomic number identifies the element and refers to the number of _______.
protons
The function of ATP is to _______.
provide a form of chemical energy that is usable by all body cells
Energy that is in motion is _______.
referred to as kinetic energy
All of the following are true about the importance of water, an inorganic compound, in the body EXCEPT _______.
water is an excellent solvent because it is nonpolar
