chapter 4 quiz

Question 1

a compound contains hydroxyl groups as its predominant functional group. which of the following statements is true concerning this compound?

a:it lacks an asymmetric carbon and it is probably a fat or lipid
b: it should dissolve in water
c: it should dissolve in a non polar solvent
d: it wont form hydrogen bonds with water
e: it is hydrophobic

Answer 1

it should dissolve in water

Question 2

which of the following is a false statement concerning amino groups?

a: they are basic in pH
b: they are found in amino acids
c: they contain nitrogen
d:they are non polar
e: they are components of urea

Answer 2

they are non polar

Question 3

which two functional groups are always found in amino acids?

a: ketone and methyl
b:carbonyl and amino
c:carboxyl and amino
d:amino and sulfhydrl
e:hydroxyl and carboxyl

Answer 3

carboxyl and amino

Question 4

testosterone and estradiol are:

a: soluble in water
b:structural isomers of each other
c: proteins
d: lipids
e:enantiomers of each other

Answer 4

structural isomers of each other

Question 5

what functional group is commonly used in cells to transfer energy from one organic molecule to another?

a: carboxyl
b:sulfhydryl
c:hydroxyl
d:phosphate
e:amino

Answer 5

phosphate

Question 6

the element present in all organic molecules is

a: hydrogen
b: oxygen
c:carbon
d:nitrogen
e:phosphorus

Answer 6

carbon

Question 7

how many electron pairs does carbon share in order to complete its valence shell

a:1
b:2
c:3
d:4
e:8

Answer 7

4

Question 8

a carbon atom is most likely to form what kind of bonds with other atoms?

a:ionic
b:hydrogen
c:covalent
d:covalent bonds and hydrogen bonds
e:ionic bonds, covalent bonds, and hydrogen bonds

Answer 8

covalent

Question 9

why are hydrocarbons insoluble in water?

a:the majority of their bonds are polar covalent carbon to hydrogen linkages
b:the majority of their bonds are nonpolar covalent carbon to hydrogen linkages
c: they are hydrophillic
d: they are lighter than water
e: they exhibit considerable molecular complexity and diversity

Answer 9

the majority of their bonds are nonpolar covalent carbon to hydrogen linkages

Question 10

research indicates that ibuprofen, a drug used to relieve inflammation and pain is a mixture of two enantiomers; that is, molecules that:

a:have identical chemical formulas but differ in the branching of their carbon skeletons
b:are mirror images of one another
c:exist in either linear chain or ring forms
d:differ in the location of their double bonds
e:differ in the arrangement of atoms around their double bonds

Answer 10

are mirror images of one another