Which of the following is necessary for proper conduction of nervous impulses? A) Fe |
D |
A phospholipid is usually ________. A) partially polar and partially nonpolar |
A |
In general, the category of lipids that we refer to as oils have ________. A) a high water content |
D |
The genetic information is coded in DNA by ________. A) the regular alteration of sugar and phosphate molecules B) the sequence of the nucleotides C) the three-dimensional structure of the double helix D) the arrangement of the histones |
B |
Which of the following is not true of proteins? A) They may be denatured or coagulated by heat or acidity. B) Some types are called enzymes. C) They appear to be the molecular carriers of the coded hereditary information. D) Their function depends on the three-dimensional shape. |
C |
he single most abundant protein in the body is ________. A) DNA |
C |
Carbohydrates are stored in the liver and muscles in the form of ________. A) glucose |
C |
Coenzymes are ________. A) organic molecules derived from vitamins |
A |
The speed or rate of a chemical reaction is influenced by all of the following except ________. A) the concentration of the reactants |
D |
A chemical reaction in which bonds are broken is usually associated with ________. A) the release of energy |
A |
Salts are always ________. A) ionic compounds |
A |
The numbers listed represent the first, second, and third energy levels, respectively. On this basis, which of the following is an unstable or reactive atom? A) 2, 8, 8 |
D |
A solution that has a pH of 2 could best be described as being ________. A) acidic |
A |
Which of the following is the major positive ion outside cells? A) nitrogen |
D |
Which of the following would be regarded as an organic molecule? A) H2O |
D |
A chain of 25 amino acids would be called a ________. A) polypeptide |
A |
A long chain of simple sugars would be a ________. A) monosaccharide |
B |
The coiling of the protein chain backbone into an alpha helix is referred to as the ________. A) primary structure |
B |
Carbohydrates and proteins are built up from their basic building blocks by the ________. A) addition of a water molecule between each two units B) addition of a carbon atom between each two units C) removal of a water molecule between each two units D) removal of a nitrogen atom between each two units |
C |
Which statement about enzymes is false? A) Enzymes raise the activation energy needed to start a reaction. B) Enzymes are composed mostly of protein. C) Enzymes are organic catalysts. D) Enzymes may be damaged by high temperature. |
A |
Many plasma proteins may function as _________. A) antibodies |
C |
Which of the following is true regarding the concentration of solutions? A) Percent solutions are parts per 1000 parts. B) Molarity is one mole of solute per 1000 ml of solution. C) To calculate molarity, one must know the atomic number of the solute. D) To calculate molarity, one must know the atomic weight of the solvent. |
B |
Select the statement about mixtures that is correct. A) A solution contains solvent in large amounts and solute in smaller quantities. B) Solutions contain particles that settle out in time. C) Suspensions can change reversibly from liquid to solid. D) Suspensions are homogeneous mixtures of two or more components. |
A |
HCO3- is _________. A) a bicarbonate ion |
A |
Select which reactions will usually be irreversible regarding chemical equilibrium in living A) glucose to CO2 & H2O |
A |
In redox reactions ________. A) both decomposition and electron exchange occur |
A |
Fibrous proteins ________. A) rarely exhibit secondary structure |
B |
The ATP molecule is not used in ___________. A) chemical work |
D |
Select the most correct statement regarding nucleic acids. A) Three forms exist: DNA, RNA, and tDNA. B) DNA is a long, double-stranded molecule made up of A, T, G, and C bases. C) RNA is a long, single-stranded molecule made up of the bases A, T, G, and C. D) TDNA is considered a molecular slave of DNA. |
B |
________ is a suspension. A) Cytoplasm |
D |
Select the correct statement about isotopes. A) Isotopes of the same element have the same atomic number but differ in their atomic B) All the isotopes of an element have the same number of neutrons. C) All the isotopes of an element are radioactive. D) Isotopes occur only in the heavier elements. |
A |
The four elements that make up about 96% of body matter are ________. A) carbon, oxygen, phosphorus, calcium |
C |
An example of a coenzyme is ________. A) copper |
B |
________ is fat-soluble, produced in the skin on exposure to UV radiation, and necessary for A) Vitamin K |
D |
In liquid XYZ, you notice that light is scattered as it passes through. There is no precipitant in A) solution |
C |
Atom X has seventeen protons. How many electrons are in its valence shell? A) 3 |
C |
If an atom were to have two protons, then it would ________. A) have a valence of 0 |
B |
If atom X has an atomic number of 74 it would have ________. A) 37 protons and 37 neutrons B) 37 electrons C) 74 protons and no neutrons D) 74 protons and roughly the same number of neutrons |
D |
The formula C6H12O6 means ________. A) there are 6 calcium, 12 hydrogen, and 6 oxygen atoms B) there are 12 hydrogen, 6 carbon, and 6 oxygen atoms C) the molecular weight is 24 D) the substance is a colloid |
B |
Two good examples of a colloid would be Jell-O® or ________. A) blood |
D |
An atom with a valance of 3 may have a total of ________ electrons. A) 3 |
C |
An atom with ________ electrons could be an anion when ionically bonded. A) 3 |
C |
The chemical symbol O=O means ________. A) zero equals zero B) both atoms are bonded and have zero electrons in the outer orbit C) the atoms are double bonded D) this is an ionic bond with two shared electrons |
C |
Dipole is ________. A) a type of bond |
B |
CH4 means ________. A) there is one carbon and four hydrogen atoms |
A |
Amino acids joining together to make a peptide is a good example of a ________ reaction. A) synthesis |
A |
________ is not considered to be a factor in influencing a reaction. A) Temperature |
D |
Which of the following is not an electrolyte? A) HCl |
C |
Human blood has a pH of ________. A) 8.35-8.55 |
C |
__________ is a heavy metal normally found in the body. A) Lead |
D |
Sucrose is a ________. A) monosaccharide |
B |
Neutral fats have a ________ ratio of fatty acids to glycerol. A) 1:1 |
C |
In a DNA molecule, the phosphate serves ________. A) as a code |
B |
Most fibrous proteins in the body contain all of these except: A) keratin |
C |
Heat shock proteins (hsp) are a type of protein called ________. A) coenzymes |
D |
_________ bonds often bind different parts of a molecule into a specific 3-dimensional shape. A) Carbon |
B |
Chapter 2 – Anatomy & Physiology
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