Biology 1 Final

Carbon-14 (atomic number 6), the radioactive nuclide used in dating fossils, has: A) 8 neutrons B) 12 neutrons C) 6 neutrons D) 14 neutrons

A) 8 neutrons

Which of the following properties of water gives it greater affinity to adjacent water molecules than the atmosphere? A) surface tension B) high heat capacity C) adhesion D) cohesion E) capillary Action

A) surface tension

The element phosphorus has an atomic mass of 31 in an atomic number of 15; therefore it has: A) 31 protons and electrons B) 15 protons and 16 neutrons C) 16 protons and 15 neutrons D) 15 protons and 16 electrons E) 31 neutrons

B) 15 protons and 16 neutrons

Which of these is an example of deductive reasoning A) Your friend Martha is from England. She has brown hair and green eyes. Therefore, all people from England have brown hair and green eyes. B) Red meat has iron in it, and beef is red meat. Therefore, because iron in it. C) all life forms so far discovered are composed of cells; therefore, all life forms are composed of cells D) every cat you've observed purrs, therefore all cats must purr. E) it snowed each winter Greg spent in Vermont, therefore it will snow in Vermont this winter.

B) Red meat has iron in it, and beef is red meat. Therefore, because iron in it.

Which type of bond or interaction is responsible for the secondary structure of a polypeptide? A) disulfide bridges B) hydrogen bonds C) van der Waals interactions D) hydrophobic interactions E) peptide bonds

B) hydrogen bonds

Which of these functional groups is nonpolar? A) phosphate B) methyl C) carboxvl D) amino E) carbonyl

B) methyl

Which statement concerning a scientific theory is false? A) It is based on a number of hypotheses B) It is supported by many observations C) It is an un-changeable fact D) It may suggest practical applications E) It predicts new facts

C) It is an un-changeable fact

FaceTime reaction shown below, which molecule is the product of oxidation? Zn+Cu2-> Zn2+ + Cu A) Cu2+ B) None C) Zn2+ D) Cu E) Zn

C) Zn2+

Hyperventilation can lead to alkalemia, defined as blood serum pH above 7.45. Which molecule in the carbonic acid buffer system would be overabundant in a person with this abnormal pH? A) carbon dioxide B) H+ ion C) bicarbonate ion D) carbonic acid E) water

C) bicarbonate ion

A solution that has a pH of 7 would: A) be basic. B) have more protons (H+) than hydroxide ions (-OH). C) have an equal number of hydroxide ions (-OH) and protons (H*). D) be acidic. E) have more hydroxide ions (-OH) than protons (H*).

C) have an equal number of hydroxide ions (-OH) and protons (H*).

Cholesterol, a ubiquitous biomolecule with structural functions in the plasma membrane, is an example of what type of lipid? A) carotenoid pigment B) phospholipid C) steroid D) unsaturated fatty acid E) saturated fatty acid

C) steroid

Which property of water allows it to move through narrow tubes in opposition to gravity? A) cohesion B) surface tension C) high heat capacity D) capillary action E) adhesion

D) capillary action

If a protein becomes denatured by heat, which bonds or interactions in the protein structure will remain intact? A) ionic bonds between R groups B) hydrogen bonds between R groups in a single polypeptide chain C) hydrogen bonds within the polypeptide backbone D) peptide bonds between the amino acids E) phosphodiester bonds between the amino acids

D) peptide bonds between the amino acids

The H* concentration of a solution is 10^-4. What is the pH of the the solution? A) 6 B) 10 C) -6 D) -4 E) 4

E) 4

With the exception of hydrogen and helium, elements seek to fill their outermost level, known as the valence shell, with how many electrons in total? A) Equivalent to the number of neutrons B) 10 C) Equivalent to the number of protons D) 6 E) 8

E) 8

Cellulose differs from starch in that it: A) is found in liver and muscle cells. B) stores energy. C) is found in animal cells. D) contains nitrogen. E) provides structure for plant cells.

E) provides structure for plant cells.

Which of the following elements is a "trace" element, composing a very small portion of biological material? A) carbon B) oxygen C) nitrogen D) phosphorus E) silicon

E) silicon

Which of the following statements is true regarding van def Waals interactions? A) they are created when electrons are shared between atoms. B) they always include hydrogen. C) they are created through condensation reactions. D) they form due to the attraction of a cation and an anion. E) they only form when molecules are very close together.

E) they only form when molecules are very close together