Functional protein. |
2 |
Nucleotide |
4 |
Monosaccharide |
1 |
Polymer |
3 |
Tertiary (protein) structure. |
2 |
Which of the following elements is necessary for proper conduction of nervous impulses? A. Fe |
Na |
In general, the lipids that we refer to as oils have ________. A. a high water content |
a high degree of unsaturated bonds |
The genetic information is coded in DNA by the ________. A. regular alteration of sugar and phosphate molecules |
sequence of the nucleotides |
The single most abundant protein in the body is ________. A. DNA |
collagen |
Carbohydrates are stored in the liver and muscles in the form of ________. A. glucose |
glycogen |
Which of the following describes coenzymes? A. organic molecules derived from vitamins |
organic molecules derived from vitamins |
Which of the following is not a role of molecular chaperonins? A. prevent accidental, premature, or incorrect folding of polypeptide chains |
act as a biological catalyst |
A chemical reaction in which bonds are broken is usually associated with ________. A. the release of energy |
the release of energy |
Salts are always ________. A. ionic compounds |
ionic compounds |
A solution that has a pH of 2 could best be described as being ________. A. acidic |
acidic |
Which of the following is the major positive ion outside cells? A. nitrogen |
sodium |
Which of the following would be regarded as an organic molecule? A. H2O |
CH4 |
What is a chain of 25 amino acids called? A. polypeptide |
polypeptide |
Which of the following constitutes a long chain of simple sugars? A. monosaccharide |
polysaccharide |
What level of protein synthesis is represented by the coiling of the protein chain backbone into an alpha helix? A. primary structure |
secondary structure |
Which statement about enzymes is false? A. Enzymes raise the activation energy needed to start a reaction. |
Enzymes raise the activation energy needed to start a reaction. |
Which of the following statements is false? A. Chemical reactions proceed more quickly at higher temperatures. |
Larger particles move faster than smaller ones and thus collide more frequently and more forcefully. |
Which of the following is true regarding the concentration of solutions? A. Percent solutions are parts per 1000 parts. |
Molarity is one mole of solute per 1000 ml of solution. |
Choose the answer that best describes HCO3-. A. a bicarbonate ion |
a bicarbonate ion |
Select which reactions will usually be irreversible regarding chemical equilibrium in living systems. A. glucose to CO2 and H2O |
glucose to CO2 and H2O |
What happens in redox reactions? A. both decomposition and electron exchange occur |
both decomposition and electron exchange occur |
Choose the answer that best describes fibrous proteins. A. rarely exhibit secondary structure |
are very stable and insoluble in water |
Select the most correct statement regarding nucleic acids. A. Three forms exist: DNA, RNA, and tDNA. |
DNA is a long, double-stranded molecule made up of A, T, G, and C bases. |
Which of the following is an example of a suspension? A. cytoplasm |
blood |
The four elements that make up about 96% of body matter are ________. A. carbon, oxygen, phosphorus, calcium |
carbon, oxygen, hydrogen, nitrogen |
An example of a coenzyme is ________. A. copper |
riboflavin (vitamin B2) |
________ is fat soluble, produced in the skin on exposure to UV radiation, and necessary for normal bone growth and function. A. Vitamin K |
Vitamin D |
In liquid XYZ, you notice that light is scattered as it passes through. There is no precipitant in the bottom of the beaker, though it has been sitting for several days. What type of liquid is this? A. solution |
colloid |
Atom X has 17 protons. How many electrons are in its valence shell? A. 3 |
7 |
Which protein types are vitally important to cell function in all types of stressful circumstances? A. structural proteins |
molecular chaperones |
If atom X has an atomic number of 74 it would have which of the following? A. 37 protons and 37 neutrons |
74 protons |
What does the formula C6H12O6 mean? A. There are 6 calcium, 12 hydrogen, and 6 oxygen atoms. |
There are 12 hydrogen, 6 carbon, and 6 oxygen atoms. |
Two good examples of a colloid would be Jell-O® and ________. A. blood |
cytosol |
An atom with a valence of 3 may have a total of ________ electrons. A. 3 |
13 |
Which of the following is a neutralization reaction? A. HCl H+ + Cl- |
HCl + NaOH NaCl + H2O |
What is a dipole? A. a type of bond |
a polar molecule |
What does CH4 mean? A. There is one carbon and four hydrogen atoms. |
There is one carbon and four hydrogen atoms. |
Amino acids joining together to make a peptide is a good example of a(n) ________ reaction. A. synthesis |
synthesis |
Which of the following is not considered a factor in influencing a reaction? A. temperature |
time |
Which of the following is not an electrolyte? A. HCl |
H2O |
Which property of water is demonstrated when we sweat? A. high heat capacity |
high heat of vaporization |
Sucrose is a ________. A. monosaccharide |
disaccharide |
What is the ratio of fatty acids to glycerol in neutral fats? A. 1:1 |
3:1 |
In a DNA molecule, the phosphate serves ________. A. as a code |
to hold the molecular backbone together |
Which bonds often bind different parts of a molecule into a specific three-dimensional shape? A. Carbon |
Hydrogen |