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BIO156 Exam 1

Total questions: 25

Worksheet time: 6hrs 15mins

Name
Class
Date
1.

What does the atomic number of an element represent?

a)

Number of protons

b)

Number of electrons

c)

Number of neutrons

d)

Atomic Mass

2.

Which of the following macromolecules are found in humans?

a)

Carbohydrates

b)

Proteins

c)

Lipids

d)

Nucleic Acids

e)

All of these

3.

Name the four most common elements found in the human body.

a)

C, H, O, N

b)

C, H, O, P

c)

C, H, O, S

d)

C, H, N, S

4.
Which describes the charge of each proton in an atom?
a)
+
b)
-
c)
no charge
d)
undefined
5.
How could you determine the number of electrons in an atom using the periodic table?
a)
Use the atomic number
b)
Use the atomic mass
c)
Count the number neutrons
d)
Count the number of
6.

Which juice contains a higher amount of hydrogen ions (H+); lemon juice (pH-2) or tomato juice (pH-3)?

a)

lemon juice

b)

tomato juice

c)

both are the same

d)

impossible to know

7.
What type of chemical bond holds water molecules near to eachother, allowing water droplets to form?
a)
hydrogen bond
b)
covalent bond
c)
ionic bond
d)
polar covalent
8.
What type of chemical bond connects each atom in a water molecule?
a)
hydrogen bond
b)
covalent bond
c)
ionic bond
d)
polar covalent
9.
Name the type of bond that holds ions together.
a)
hydrogen bond
b)
covalent bond
c)
ionic bond
d)
polar covalent
10.

Covalent bonds between atoms ________ the electrons between the atoms to form the bond.

a)

share

b)

lose

c)

gain

d)

charge

11.
Glucose molecules are _______ which can connect together in long chains to form polymers.
a)
monomers
b)
polysaccharides
c)
trimers
d)
dimers
12.
Dehydration synthesis reactions covalently join monosaccharides to form disaccharides and polysaccharides.
a)
true
b)
false
13.
Name the molecule that is released during a dehydration synthesis reaction.
a)
Water
b)
Salt
c)
Hydrogen
d)
Oxygen
14.
Hydrolysis reactions break covalent bond of polysaccharides, into disaccharides and monosaccharides.
a)
true
b)
false
15.
What is the name of the carbohydrate that acts as an energy storage macromolecule in the human liver & muscle tissues.
a)
Glycogen
b)
Glucose
c)
Lipids
d)
Proteins
16.
Amino acids act as monomers to build
a)
Carbohydrates
b)
Proteins
c)
Lipids
d)
Nucleic Acids
17.
Which functional groups are present in all amino acids? (Choose 2)
a)
Methyl
b)
Sulfhydryl
c)
Carboxyl
d)
Amino
18.
How would you describe a solution with a pH 11.0?
a)
Basic, Low
b)
Basic, High
c)
Acidic, Low
d)
Acidic, High
19.
Identify the substance closest to neutral pH.
a)
Blood; 7.3
b)
Orange Juice; 4.0
c)
Ammonia; 11.0
d)
Milk; 6.5
20.
Fish increase swimming activity in colder waters. Which property of life does this action best represent? Living things...
a)
process energy
b)
grow and develop
c)
respond to stimuli
d)
maintain homeostasis
21.
Blood vessels in humans can constrict (squeeze to a smaller diameter) or dilate (become bigger in diameter) during exercise. Which property of life does this action best represent? Living things...
a)
process energy
b)
reproduce
c)
evolve
d)
respond to stimuli
e)
maintain homeostasis
22.
Certain types of heat-resistant bacteria live in boiling hot springs. What characteristic of living things is this most correctly described as?
a)
process energy
b)
reproduce
c)
evolve
d)
respond to stimuli
e)
maintain homeostasis
23.

Which definition below best describes the term "organic" in terms of biology and scientific investigation?

a)

non-living matter

b)

Any substance that doesn't contain carbon-based compounds.

c)

Any substance containing carbon-based compounds, especially produced by or derived from living organisms.

d)

Overly priced food choices from Whole foods or Sprouts.

24.

Identify the type of macromolecule represented by the molecular structure shown.

a)

Carbohydrate

b)

Protein

c)

Nucleotide

d)

Fatty Acid

25.

What is the ratio of carbon, to hydrogen, to oxygen atoms in the molecule shown?

a)

2:2:2

b)

1:1:1

c)

6:12:6 or 1:2:1

d)

100%

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