BIO100 Lesson 2 Quiz 2

Topics: Oxygen, Atom, Hydrogen Pages: 6 (508 words) Published: December 15, 2014
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Marvis Kennedy
BIO100 - Lesson 2, Quiz 2 Section 14429

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 Submitted On
12/12/2014 11:16:00 PM
Points Awarded
85
Date Graded
12/12/2014 11:16:00 PM
 Status
Graded
Points Possible
100

 
Question 1
The subatomic particles that play the greatest role in cellular chemical reactions are Answer
electrons.
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Question 2
The structural unit that retains the properties of an element is the Answer
atom.
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Question 3
Which of the following are found in the nucleus of an atom?
Answer
A and B
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Question 4
The component of an atom or molecule that is most important in determining its chemical properties is the Answer
electron.
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Question 5
What is the maximum number of electrons the innermost shell can hold? Answer
4
Comments
The correct answer is:
Two

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Question 6
An atom becomes an ion when
Answer
it gains or loses electrons.
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Question 7
The symbol 3CO2 represents
Answer
three molecules of carbon dioxide.
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Question 8
In water, hydrogen bonding occurs between the hydrogen and
Answer
a hydrogen atom in a different molecule.
Comments
The correct answer is:
an oxygen atom in a different molecule.

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Question 9
Covalent bonds form when one atom _________ its _________ with another atom. Answer
shares; electrons
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Question 10
Water is an important solvent of life because
Answer
it forms hydrogen bonds.
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Question 11
Carbon is such an important molecule for life because
Answer
it can form chemical bonds with a maximum of four other atoms. Comments
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Question 12
Pure water has a pH of ________ because it is_________.
Answer
0; neither acidic nor basic
Comments
The correct answer is:
7; neither acidic nor basic

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Question 13
Hydrolysis could be correctly described as
Answer
breaking of a long-chain compound into its subunits by adding water to the structure between its subunits. Comments
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Question 14
Carbohydrate monomers are united into a polymer by means of
Answer
dehydration synthesis.
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Question 15
Polysaccharides are made up of
Answer
sugars.
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Question 16
Butter is made of milkfat and tends to be hard at room temperature. Which of the following could be used to make the butter softer at room temperature? Answer
Create more double bonds in the fatty acid chains
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Question 17
Proteins are made up of
Answer
Amino acids.
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Question 18
An organic molecule that may contain the –NH2 group is
Answer
an enzyme.
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Question 19
DNA is made up of:
Answer
nucleotides.
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Question 20
Which of the following describes a special type of protein that causes metabolic reactions to proceed at a much greater rate than they normally would? Answer
Enzyme
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