Chapter Chapter 3: The Molecules of Cells
 
Activities
 

1 .       How do these hydrocarbons differ? (Activity 3A)

question #1 [Hint]

 One of these hydrocarbons has a ring structure.
 One of these hydrocarbons has a double bond.
 One of these hydrocarbons is branched.
 These hydrocarbons are identical.
 One of these hydrocarbons is longer than the other.
2 .       How do these hydrocarbons differ? (Activity 3A)

question #2 [Hint]

 One of these hydrocarbons is longer than the other.
 One of these hydrocarbons has a double bond.
 One of these hydrocarbons is branched.
 One of these hydrocarbons has a ring structure.
 These hydrocarbons are identical.
3 .       How do these hydrocarbons differ? (Activity 3A)

question #3 [Hint]

 These hydrocarbons are identical.
 One of these hydrocarbons has a ring structure.
 One of these hydrocarbons is longer than the other.
 One of these hydrocarbons is branched.
 One of these hydrocarbons has a double bond.
4 .       How do these hydrocarbons differ? (Activity 3A)

question #4 [Hint]

 One of these hydrocarbons is branched.
 One of these hydrocarbons has a ring structure.
 One of these hydrocarbons has a double bond.
 The hydrocarbon on the left contains more carbon atoms than the hydrocarbon on the right.
 These hydrocarbons are identical.
5 .       How many hydrogen atoms can be attached to carbon A? (Activity 3A)

question #5 [Hint]

 0
 1
 2
 3
 4
6 .       How many hydrogen atoms can be attached to carbon B? (Activity 3A)

question #6 [Hint]

 1
 2
 3
 4
 0
7 .       Which one of these is an amino group? (Activity 3B)

question #15 [Hint]

 B
 D
 E
 A
 C
8 .       Click to open the animation. What name is given to the process seen in this animation? (Activity 3C) [Hint]

 hydrolysis
 water formation
 catabolism
 dehydration synthesis
 monomerization
9 .       Glycogen is _____. (Activity 3E) [Hint]

 the form in which plants store sugars
 a polysaccharide found in animals
 a polysaccharide found in plant cell walls
 a transport protein that carries oxygen
 a source of saturated fat
10 .       glucose + glucose —> _____. (Activity 3E) [Hint]

 lactose + water
 starch + water
 sucrose + water
 cellulose + water
 maltose + water
11 .       Which of these is a source of lactose? (Activity 3E) [Hint]

 sugar beets
 milk
 potatoes
 sugar cane
 starch
12 .       Which of these is a polysaccharide? (Activity 3E) [Hint]

 sucrose
 glucose
 galactose
 lactose
 cellulose
13 .       _____ is the most abundant organic compound on Earth. (Activity 3E) [Hint]

 Glucose
 Cellulose
 Lactose
 Starch
 Glycogen
14 .       Which of these is NOT a lipid? (Activity 3F) [Hint]

 phospholipid
 cholesterol
 steroids
 RNA
 wax
15 .       This figure is an example of a(n) _____. (Activity 3F)

question #8 [Hint]

 nucleic acid
 protein
 saturated fat
 unsaturated fat
 steroid
16 .       Which of these is a phospholipid? (Activity 3F) [Hint]

 answer #1
 answer #2
 answer #3
 answer #4
 answer #5
17 .       Which of these is rich in unsaturated fats? (Activity 3F) [Hint]

 a fat that is solid at room temperature
 butter
 beef fat
 lard
 olive oil
18 .       A function of cholesterol that does not harm health is its role _____. (Activity 3F) [Hint]

 in calcium and phosphate metabolism
 as a component of animal cell membranes
 as the primary female sex hormone
 the most abundant male sex hormone
 All of cholesterol's effects cause the body harm.
19 .       Click to open the animation. This animation illustrates the functioning of a _____ protein. (Activity 3G) [Hint]

 contractile
 receptor
 transport
 structural protein
 gene regulatory
20 .       Arrow A is indicating a(n) _____ protein. (Activity 3G)

question #13 [Hint]

 transport
 enzyme
 receptor
 signal
 structural
21 .       Arrow D is indicating a _____ protein. (Activity 3G)

question #14 [Hint]

 gene regulatory
 receptor
 storage
 transport
 defensive
22 .       Which of these does NOT contain a structural protein? (Activity 3G) [Hint]

 muscles
 tendons
 ovalbumin
 spider silk
 ligaments
23 .       Defensive proteins are manufactured by the _____ system. (Activity 3G) [Hint]

 immune
 nervous
 digestive
 integumentary
 cardiovascular
24 .       Proteins are polymers of _____. (Activity 3H) [Hint]

 CH2O units
 nucleotides
 amino acids
 hydrocarbons
 glycerol
25 .       What type of bond joins the monomers in a protein's primary structure? (Activity 3H) [Hint]

 ionic
 hydrophobic
 peptide
 S—S
 hydrogen
26 .       Which of these illustrates the secondary structure of a protein? (Activity 3H) [Hint]

 answer #1
 answer #2
 answer #3
 answer #4
 answer #5
27 .       The secondary structure of a protein results from _____. (Activity 3H) [Hint]

 hydrogen bonds
 ionic bonds
 hydrophobic interactions
 peptide bonds
 bonds between sulfur atoms
28 .       Tertiary structure is NOT directly dependent on _____. (Activity 3H) [Hint]

 hydrophobic interactions
 peptide bonds
 hydrogen bonds
 ionic bonds
 bonds between sulfur atoms
29 .       If a strand of DNA has the nitrogen base sequence ATTTGC, what will be the sequence of the matching strand? (Activity 3I) [Hint]

 GCAAAT
 ATTTGC
 TAAACG
 TUUUCG
 UAAACG
30 .       If a DNA double helix is 100 nucleotide pairs long and contains 25 adenine bases, how many guanine bases does it contain? (Activity 3I) [Hint]

 25
 150
 75
 50
 200
31 .       The two strands of a DNA double helix are held together by _____ that form between pairs of nitrogenous bases. (Activity 3I) [Hint]

 hydrogen bonds
 ionic bonds
 hydrophilic interactions
 S—S bonds
 covalent bonds
32 .       A nucleotide is composed of a(n) _____. (Activity 3I) [Hint]

 phosphate group, a nitrogen-containing base, and a hydrocarbon
 phosphate group, a nitrogen-containing base, and a five-carbon sugar
 glycerol, a nitrogen-containing base, and a five-carbon sugar
 amino group, a nitrogen-containing base, and a five-carbon sugar
 sulfhydryl group, a nitrogen-containing base, and a five-carbon sugar