Download Chapter 4 mastery check

Chapter 4 mastery check
1.
Which of the following didi the results of Stanley Miller’s experiments support
a. abiotic synthesis of organic compounds
b. possible first stage in the origin of life
c. mechanism
d. vitalism
e. Answers a, b, and c are correct
!2. Carbon’s valence of four most directly results from
a.
b.
c.
d.
e.
its tetrahedral shape
its very slight electronegativity
its four electrons in the valence shell that can form 4 covalent bonds
its ability to form single, double, and triple bonds
its ability to form chains and rings of carbon atoms
!3. Hydrocarbons are not soluble in water because they are hydrophilic
a. they are hydrophilic
b. the C—H bond is nonpolar
c. they do not ionize
d. they store energy in the many C—H bonds along the carbon backbone
e. they are lighter than water
!4. Which of the following is not true of an asymmetric carbon atom?
a.
b.
c.
d.
e.
It is attached to four different atoms or groups
it results in right- and left-handed versions of a molecule
It is found in all enantiomers
its configuration is in the shape of a tetrahedron
It is found in all cis-trans isomers
a.
b.
c.
d.
e.
they have different chemical properties
they have the same molecular formula
their atoms and bonds are arranged in different sequences
they are a result of restricted movement around a carbon double bond
their possible numbers increase as carbon skeletons increase in size.
!5. Which statement is not true about structural isomers?
!6. The fats stored in your body consist mostly of
a. methyl groups
b. alcohols
c. carboxylic acids
d. hydrocarbons
e. organic phosphates
!7. The following ribose molecule contains how many asymmetric carbons?
a.
b.
c.
d.
e.
1
2
3
4
5
!8. Which of the following is mismatched with its description?
a. phosphate-forms bonds that stabilize protein structure
b. hydroxyl and carbonyl-components of sugars
c. ATP-source of energy for cellular processes
d. methyl-its addition changes the shape and function of molecules
Chapter 4 mastery check
e. amino and carboxyl -components of amino acids
!9. The
chemical group that can cause an organic molecules to act as a base is
a.
b.
c.
d.
e.
—COOH
—OH
—SH
—NH2
—CH3
!10. The chemical group that confers acidic properties to organic molecules is
a. —COOH
b. —OH
c. —SH
d. —NH2
e. —CH3
!!
!Matching: Match the formulas (a-f) to the terms below. Choices may be used more than once, and terms
may have more than one correct answer.
!
!!
________1. Structural isomers!
!!
________2. cis-trans isomers!
!
________3. can have enantiomers!
!!
________4. carboxylic acid!
!!
________5. can make cross link in a protein!
________6. hydrophilic!
!!
________7. hydrocarbon!
!
________8. amino acid!
!
________9. organic phosphate!
!!
________10. aldehyde!
!!
________11. amine!
________12. ketone!
!!
!
!
!!
!!
!!
!!
Chapter 4 mastery check
1. e
2. c
3. b
4. e
5. d
6. d
7. c
8. a
9. d
10. a
!Matching
!1. a,c
2. b,f
3. a,d,e
4. e
5. e
6. a,c,d,e
7. b,f
8. e
9. a,c
10. a,d
11. e
12. c
!
Chapter 4 mastery check
- -
H3C
—
H
b.
C==C
—
H
—
—
=
- -
- =
! OH H
O
!! -C—C—C—O—P—OH
!!
H H
Oa.
O
!
CH3
— — — —
H
H—C —OH
O
=
C =O
—
H—C —O —P —OH
O-
c.
H
— — —
O
— — — — — — =—
=
H
O
=
N2H—C—C —
OH
CH2
C
H—C —OH
e.
SH
HO —C —H
H—C —OH
d.
H
f.
CH3
—
C==C
—
H
H
—
H—C —OH
H3C
—
HO —C —H
Chapter 4 mastery check
a.
O
— — — — — =—
=
H
C
H —C —OH
H —C —OH
H —C —OH
H—C —OH
H