Bio Quizzes 1-5

Front 1

Which of the following make up approximately 98% of living matter?

a) carbon, sodium, chlorine, nitrogen, hydrogen

b) carbon, sulfur, phosphorus, hydrogen, magnesium

c) oxygen, hydrogen, calcium, sodium, carbon

d) carbon, oxygen, sulfur, calcium, nitrogen

e) carbon, hydrogen, nitrogen, oxygen, calcium

Back 1

E

Front 2

Which of the following properties identifies each unique element?

a) atomic mass

b) atomic weight

c) atomic number

d) mass weight

e) mass number

Back 2

C

Front 3

An atom with an atomic number of 24 and one more neutron than the number of protons would have an atomic mass of:

a) 25 amu (daltons)

b) 23 grams

c) 48 amu (adltons)

d) 48 grams

e) 49 amu (daltons)

Back 3

E

Front 4

Which of the following best describes the relationship between the atoms described below? 1:1 H, 3:1 H

a) they are isoptopes of each other

b) they are both polymers

c) they are different types of hydrogen bonds

d) they contain 1 and 3 protons respectively

Back 4

A

Front 5

The reactive properties, or chemical behavior, of an atom depend on the number of:

a) electrons in the outer, valence shell of the atom

b) orbitals found in the atom

c) electrons in each orbital of the atom

d) quantam shells in the atom

e) hybridized orbitals in the atom

Back 5

A

Front 6

What is the maximum number of covalent bonds an element with atomic number 16 can make with hydrogen?

a) 1

b) 2

c) 3

d) 4

e) 5

Back 6

B

Front 7

What bond results from the transfer of an electron from a copper atom to sulfate to make copper sulfate salt (CuSO4)?

a) a nonpolar covalent bond

b) a polar covalent bond

c) a hydrogen bond

d) an ionic bond

e) a james bond

Back 7

D

Front 8

Based on electron configuration, which of these elements would exhibit chemical behavior most like that of Nitrogen?

a) Carbon

b) Hydrogen

c) Oxygen

d) Sulfur

e) Phosphorus

Back 8

E

Front 9

The atomic number of chlorine is 17. The atomic number of calcium is 20. What is the formula for calcium chloride?

a) CaCl

b) CaCl2

c) Ca2Cl

d) Ca2Cl2

e) CaCl3

Back 9

B

Front 10

Which of the following molecules results form a nonpolar covalent bond?

a) H2O

b) MgCl

c) NH3

d) Fe+

e) CH4

Back 10

E

Front 11

In a single molecule of water, the two hydrogen atoms are bonded to a single oxygen atom by:

a) hydrogen bonds

b) polar covalent bonds

c) nonpolar covalent bonds

d) ionic bonds

e) van der Waals interactions

Back 11

B

Front 12

The slight negative charge at the side of one water molecule is attracted to the slight positive charge of another water molecule. What is this attraction called?

a) a covalent bond

b) a hydrogen bond

c) an ionic bond

d) a hydrophilic bond

e) a hydrophobic bond

Back 12

B

Front 13

An example of a hydrogen bond is the bond between:

a) the N in NH3 and an H in H2O

b) the H of one water molecule and the O of an adjacent water molecule

c) a hydrogen atom in a sugar molecule and the O of a water molecule

d) all of the above

Back 13

D

Front 14

What determines the cohesiveness of water molecules?

a) hydrophobic interactions

b) nonpolar covalent bonds

c) ionic bonds

d) hydrogen bonds

e) both A and B

Back 14

D

Front 15

What do cohesion, surface tension, and adhesion have in common with reference to water:

a) all increase when temperature increases

b) all are produced by ionic bonding

c) all are properties related to hydrogen bonding

d) all have to do with nonpolar covalent bonds

e) C and D only

Back 15

C

Front 16

Which of the following is true when an ice cube cools a drink?

a) Molecule collisions in the drink increase

b) Kinetic energy in the drink decreases

c) A calorie of heat energy is transferred from the ice to the water of the drink

d) The specific heat of the water in the drink decreases

e) Evaporation of the water in the drink increases

Back 16

B

Front 17

Which of the following is a correct definition of a kilocalorie?

a) the amount of heat required to raise the temperature of 1 g of water by 1oF

b) the amount of heat required to raise the temperature of 1 g of water by 1oC

c) the amount of heat required to raise the temperature of 1 kg of water by 1oF

d) the amount of heat required to raise the temperature of 1 kg of water by 1oC

e) the amount of heat required to raise the temperature of 1,000 g of water by 1oF

Back 17

D

Front 18

Water's high specific heat is mainly a consequence of the:

a) small molecular mass of water molecules

b) absorption or release of heat when hydrogen bonds break or form

c) high specific heat of oxygen and hydrogen atoms

d) fact that water is a poor heat conductor

e) inability of water to dissipate heat into dry air

Back 18

B

Front 19

Which bonds must be broken for water to vaporize?

a) hydrogen bonds

b) nonpolar covalent bonds

c) polar covalent bonds

d) fact that water is a poor heat conductor

e) covalent bonds

Back 19

A

Front 20

Life on Earth is dependent on all the properties of water as well as the abundance of water. Which property of water is probably most important for the functioning of organisms at the molecular level?

a) high specific heat

b) cohesion and high surface tension

c) versatility as a solvent

d) expansion upon freezing

e) high heat of vaporization

Back 20

C

Front 21

Stanley Miller's experiments were significant because he demonstrated that:

a) the behavior of any molecule containing a carbon atom was fundamentally the same

b) urea could be synthesized from entirely naturally occurring salts of carbon and mercury

c) simple organic compounds like amino acids could be synthesized spontaneously from components in Earth's primitive atmosphere

d) lightning discharges could produce all the molecules found in living organisms.

Back 21

C

Front 22

The protein molecule pictured in the diagram probably has an a.m.u. total of:

a) 1-2

b) 20-30

c) about 50

d) > 100

Back 22

D

Front 23

Which of the following is an organic molecule?

a) Ne

b) O2

c) CH4

d) NaCl

e) H2O

Back 23

C

Front 24

What is the 3D shape created by hybrid orbitals that are formed when a carbon atom is covalently bonded with 4 others atoms?

a) a flat sheet with carbon in the center

b) a triangle with carbon in the center

c) a cube with carbon in the center

d) a tetrahedron with carbon in the center

Back 24

D

Front 25

Carboxyl is to _____ as _____ is to base.

a) sulfhydryl...carbonyl

b) acid...amino

c) hydroxyl...amino

d) ketone...phosphate

Back 25

B

Front 26

An ionized or dissociated carboxyl group may be written as:

a) -COOH

b) -OH

c) -COO-

d) NH4+

Back 26

C

Front 27

Which one of the following functional groups can increase solubility of organic compounds in water?

a) -SH

b) -COOH

c) -COH

d) -NH2

e) all of the above

Back 27

E

Front 28

Which of the following functional groups is present in all amino acids?

a) -SH

b) -COH

c) -OH

d) -NH2

Back 28

D

Front 29

The two compounds in the diagram are considered:

H H H H H H H H H H

H-C=C-C-C=C-H H-C-C=C-C=C-H

H H

a) polar hydrocarbons

b) inorganic compounds

c) structural isomers

d) functional groups

Back 29

C

Front 30

Which of the following is NOT considered a major organic compound or macromolecule in living organisms?

a) lipids b) carbohydrates

c) nucleic acids d) ammonium salts

e) proteins

Back 30

D

Front 31

A DNA nucleotide contains a pentose, a phosphate, and a(n):

a) lipid

b) glycerol

c) nitrogen base

d) amino acid

Back 31

C

Front 32

Which of the following is characteristic of proteins?

a) some function as enzymes

b) they provide structural units in the form of keratin or collagen

c) they possess glycosidic linkages between amino acids

d) both a and b

e) botch a and c

Back 32

D

Front 33

Polymerization reactions in which proteins are synthesized from amino acids

a) require energy

b) result in the formation of water

c) are dehydration synthesis reactions

d) all of the above

Back 33

D

Front 34

Glucose and fructose both have the formula, C6H12O6. They are both _______ but the fact that the atoms in their molecules are arranged differently makes them ______.

a) disaccharides....isotopes of each other

b) polysaccharides....enzymatic equivalents

c) oligosaccharides....chemically neutral

d) monosaccharides....structural isomers

e) monosteroids....sucrose derivatives

Back 34

D

Front 35

Which of the following is NOT a type of fat molecule found in the human body?

a) phospholipid

b) catalyst

c) cholesterol

d) triacylglycerol

Back 35

B

Front 36

In animals, glucose is stored in the form of:

a) cellulose

b) amylose

c) glycogen

d) fructose

Back 36

C

Front 37

The primary structure of a protein is determined by its _____ while its quaternary structure is determined by its ______.

a) disulfide bridges....sulfhydryl bridges

b) sequence of amino acids....polypeptide bonding

c) branching....convergence

d) 3D structure.....2D structure

Back 37

B

Front 38

Amino acids can be classified by the

a) number of monosaccharides they contain

b) number of carbon-carbon double bonds in their fatty acids

c) number of peptide bonds they can form

d) characteristics of their R side chains

Back 38

D

Front 39

What is the difference between the 2 molecules in the diagram (Ribose and Deoxyribose)?

a) one is found in RNA and one is found in DNA

b) one contains more oxygen than the other

c) one would never be found bonded to uracil

d) all of the above

Back 39

D

Front 40

What is the difference between saturated and unsaturated fatty acids?

a) saturated fatty acids are polymers of unsaturated fatty acids

b) at room temperature, saturated fatty acids are oily while unsaturated fatty acids are solid

c) saturated fatty acids have fewer double bonded carbons while unsaturated fatty acids have more

d) all of the above

Back 40

C