Name: ___________________________ Date: _____________ Period: _______
Ch 2 Quiz – Chemical Basis of Life - Key
1. A negatively charged subatomic particle that moves around the nucleus is a(n) orbital
a. orbital
b. proton
c. neutron
d. electron
2. Acids:
a. are proton donors
c. release hydrogen ions in an aqueous solution
b. taste sour
d. All of the above
3. The approximate pH of gastric fluid is:
a. 10
b. 8
c. 6
d. 2
4. Peptide bonds join together molecules of:
a. glycerol
b. glucose
d. water
c. amino acids
5. All of the following substances are organic except:
a. lipids
c. carbohydrates
d. proteins
b. electrolytes
6. Humans can synthesize 12 of 20 amino acids; the remaining 8, which must be included in the diet, are called:
a. enzymes
c. structural proteins
d. peptide bonds
b. essential amino acids
7. The basic building blocks of fats are:
a. monosaccharides
c. amino acids
b. disaccharides
d. fatty acids and glycerol
8. DNA:
a. is a single strand of nucleotides
b. contains the sugar ribose
c. is the heredity molecule
d. transports amino acids during protein synthesis
9. The study of metabolism includes examination of:
a. catabolism
c. ATP requirements
b. anabolism
d. All of the above
10. The type of lipid found in sex hormones is:
a. triglycerides
c. steroids
b. phosphoglycerides
d. prostaglandins
Word bank: Possible choices may be used more than once or not at all.
a. covalent
ab. ionic
bd. metallic
abc. hydrogen
ade. enzyme
b. starch(s)
ac. Lipid(s)
be. protein(s)
abd. carbohydrate(s)
c. biurets
ad. sudan III
cd. iodine
abe. benedicts
d. cytosine
ae. adenine
ce. thymine
acd. high specific heat
e. polar
bc. synthesis
de. decomposition ace. nucleic acids
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
Give two properties of water: __e. polar ___ & __acd. high specific heat______.
Sodium chloride is an example of a ______ ab. ionic______ bond.
A chemical reaction in which substances combine to form a more complex substance is called: _ bc. synthesis _.
In the organic lab, we tested ______b. starch__________ with Iodine.
The presence of proteins was with the indicator ____ c. biurets _____.
The compliment of ___ d. cytosine ___ is guanine.
Weak bonds that allow water molecules to attract each other are called: _abc. hydrogen _ bonds.
Catalase is a(n) ____ ade. enzyme_____ .
Enzymes are _____ be. proteins_______.
Dehydration synthesis splits, combines molecules by combining, removing water. (Circle answers)
Name: ___________________________ Date: _____________ Period: _______
Ch 2 Quiz – Chemical Basis of Life
21. A negatively charged subatomic particle that moves around the nucleus is a(n) orbital
a. orbital
b. proton
c. neutron
d. electron
22. Acids:
a. are proton donors
c. release hydrogen ions in an aqueous solution
b. taste sour
d. All of the above
23. The approximate pH of gastric fluid is:
a. 10
b. 8
c. 6
d. 2
24. Peptide bonds join together molecules of:
a. glycerol
b. glucose
c. amino acids
d. water
25. All of the following substances are organic except:
a. lipids
c. carbohydrates
b. electrolytes
d. proteins
26. Humans can synthesize 12 of 20 amino acids; the remaining 8, which must be included in the diet, are called:
a. enzymes
c. structural proteins
b. essential amino acids
d. peptide bonds
27. The basic building blocks of fats are:
a. monosaccharides
c. amino acids
b. disaccharides
d. fatty acids and glycerol
28. DNA:
a. is a single strand of nucleotides
b. contains the sugar ribose
c. is the heredity molecule
d. transports amino acids during protein synthesis
29. The study of metabolism includes examination of:
a. catabolism
c. ATP requirements
b. anabolism
d. All of the above
30. The type of lipid found in sex hormones is:
a. triglycerides
c. steroids
b. phosphoglycerides
d. prostaglandins
Word bank: Possible choices may be used more than once or not at all.
a. covalent
ab. ionic
bd. metallic
abc. hydrogen
ade. enzyme
b. starch(s)
ac. Lipid(s)
be. protein(s)
abd. carbohydrate(s)
c. biurets
ad. sudan III
cd. iodine
abe. benedicts
d. cytosine
ae. adenine
ce. thymine
acd. high specific heat
e. polar
bc. synthesis
de. decomposition ace. nucleic acids
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
Give two properties of water: ______________________ & ___________________.
Sodium chloride is an example of a ___________________ bond.
A chemical reaction in which substances combine to form a more complex substance is called: ______________.
In the organic lab, we tested _______________________ with Iodine.
The presence of proteins was with the indicator _____________________.
The compliment of ___________________ is guanine.
Weak bonds that allow water molecules to attract each other are called: _____________ bonds.
Catalase is a(n) _____________________ .
Enzymes are ________________________.
Dehydration synthesis splits, combines molecules by combining, removing water. (Circle answers)