Question 1

T/F?
When looking for evidence of life, we often are looking for direct evidence?

Accepted Answer

False

Question 2

T/F?
When looking for life on other planets, we are using our image of life as guide.

Accepted Answer

True

Question 3

The best experimental design __________.
A) includes a large sample size for each condition 
B) includes a control 
C) alters only one condition between the controls and the experimental condition 
D) all of the above

Accepted Answer

D)

Question 4

A friend of yours calls to say that his car would not start this morning. He asks for your help. You say that you think the battery must be dead. If so, then jump-starting the car from a good battery will solve the problem. In doing so, you are ________.

Accepted Answer

C)

Question 5

A controlled experiment __________.
A) is repeated many times to ensure that the results are accurate
B) includes at least two groups, one of which does not receive the experimental treatment

Accepted Answer

B)

Question 6

Which of the following are compounds?
A) H20, O2, and CH4
B) H20 and 02
C) O2 and CH4
D) H20 and CH4, but not 02

Accepted Answer

D)

Question 7

Atoms have no electric charge because they have _______.
A) uncharged neutrons in their nuclei
B) an equal number of protons and neutrons
C) an equal number of protons and electrons
D) an equal number of charged and uncharged subatomic particles

Accepted Answer

D)

Question 8

A(n) ________ has a charge but negligible mass, whereas a(n) ________ has mass but no charge.
A) proton; neutron
B) electron; neutron
C) neutron; electron
D) neutron; proton

Accepted Answer

B)

Question 9

What element does not prefer to react with other elements?
A) hydrogen
B) helium
C) beryllium
D) both hydrogen and beryllium

Accepted Answer

B)

Question 10

When are atoms are most stable?
A) when they have the fewest possible valence electrons
B) when they have the maximum number of unpaired electrons
C) when all of the electron orbitals in the valence shell are filled
D) when all electrons are paired

Accepted Answer

C)

Question 11

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by ________.
A) hydrogen bonds
B) nonpolar covalent bonds 
C) polar covalent bonds
D) ionic bonds

Accepted Answer

C)

Question 12

Which of the following can be attributed to water's high specific heat?
A) Oil and water do not mix well.
B) A lake heats up more slowly than the air around it.
C) Ice floats on water.
D) Sugar dissolves in hot tea faster than in iced tea.

Accepted Answer

B)

Question 13

Hydrophobic substances such as vegetable oil are _______.
A) nonpolar substances that repel water molecules
B) nonpolar substances that have an attraction for water molecules
C) polar substances that repel water molecules

Accepted Answer

A)

Question 14

Based on your knowledge of the polarity of water molecules, the solute molecule depicted is most likely _______.
A) positively charged
B) negatively charged
C) without charge
D) nonpolar

Accepted Answer

A)

Question 15

Cohesion, surface tension, and adhesion are the properties of water molecules that ______.
A) increase when temp increases
B) increase when pH increases
C) are a result of hydrogen bonding
D) are a result of polar covalent bonding

Accepted Answer

C)

Question 16

How many molecules of water are released during the polymerization of a 20 monomer-long cellulose molecule?
A) 10 B) 19 C) 20 D)40

Accepted Answer

B)

Question 17

The kind and number of bonds an atom can form depends on ______.
A) its atomic number 
B) its electron configuration
C) its atomic mass
D) the number of particles in its nucleus

Accepted Answer

B)

Question 18

An ionic bond between two atoms is formed as a result of the _____.
A) sharing of electrons
B) loss of electrons from both atoms
C) loss of a proton from one atom 
D) transfer of electrons from one atom to the other

Accepted Answer

D)

Question 19

A covalent bond between two atoms is formed as a result of the ______. 
A) sharing of electrons
B) loss of electrons from both atoms
C) loss of a proton from one atom
D) transfer of electrons from one atom to the other

Accepted Answer

A)

Question 20

T/F?
The more hydrogen bonds that you form, the more energy it will require to break them.

Accepted Answer

True

Question 21

What is the name of the functional group shown in the figure?
R-C=O
       -O-H
A) carbonyl
B) ketone
C) aldehyde 
D) carboxyl

Accepted Answer

D)

Question 22

Which functional group shown can pick up protons and raise the pH of the surrounding solution?

Accepted Answer

-NH2

Question 23

Which of the functional groups shown helps stabilize proteins by forming covalent cross-links within or between protein molecules?

Accepted Answer

-SH

Question 24

T/F?
The function of a structure dictates its form.

Accepted Answer

False

Question 25

The _____ reaction also goes by polymerization or dehydration reactions.

Accepted Answer

Condensation

Question	Answer
T/F? When looking for evidence of life, we often are looking for direct evidence?	False
T/F? When looking for life on other planets, we are using our image of life as guide.	True
The best experimental design __________. A) includes a large sample size for each condition B) includes a control C) alters only one condition between the controls and the experimental condition D) all of the above	D)
A friend of yours calls to say that his car would not start this morning. He asks for your help. You say that you think the battery must be dead. If so, then jump-starting the car from a good battery will solve the problem. In doing so, you are ________.	C)
A controlled experiment __________. A) is repeated many times to ensure that the results are accurate B) includes at least two groups, one of which does not receive the experimental treatment	B)
Which of the following are compounds? A) H20, O2, and CH4 B) H20 and 02 C) O2 and CH4 D) H20 and CH4, but not 02	D)
Atoms have no electric charge because they have _______. A) uncharged neutrons in their nuclei B) an equal number of protons and neutrons C) an equal number of protons and electrons D) an equal number of charged and uncharged subatomic particles	D)
A(n) ________ has a charge but negligible mass, whereas a(n) ________ has mass but no charge. A) proton; neutron B) electron; neutron C) neutron; electron D) neutron; proton	B)
What element does not prefer to react with other elements? A) hydrogen B) helium C) beryllium D) both hydrogen and beryllium	B)
When are atoms are most stable? A) when they have the fewest possible valence electrons B) when they have the maximum number of unpaired electrons C) when all of the electron orbitals in the valence shell are filled D) when all electrons are paired	C)
In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by ________. A) hydrogen bonds B) nonpolar covalent bonds C) polar covalent bonds D) ionic bonds	C)
Which of the following can be attributed to water's high specific heat? A) Oil and water do not mix well. B) A lake heats up more slowly than the air around it. C) Ice floats on water. D) Sugar dissolves in hot tea faster than in iced tea.	B)
Hydrophobic substances such as vegetable oil are _______. A) nonpolar substances that repel water molecules B) nonpolar substances that have an attraction for water molecules C) polar substances that repel water molecules	A)
Based on your knowledge of the polarity of water molecules, the solute molecule depicted is most likely _______. A) positively charged B) negatively charged C) without charge D) nonpolar	A)
Cohesion, surface tension, and adhesion are the properties of water molecules that ______. A) increase when temp increases B) increase when pH increases C) are a result of hydrogen bonding D) are a result of polar covalent bonding	C)
How many molecules of water are released during the polymerization of a 20 monomer-long cellulose molecule? A) 10 B) 19 C) 20 D)40	B)
The kind and number of bonds an atom can form depends on ______. A) its atomic number B) its electron configuration C) its atomic mass D) the number of particles in its nucleus	B)
An ionic bond between two atoms is formed as a result of the _____. A) sharing of electrons B) loss of electrons from both atoms C) loss of a proton from one atom D) transfer of electrons from one atom to the other	D)
A covalent bond between two atoms is formed as a result of the ______. A) sharing of electrons B) loss of electrons from both atoms C) loss of a proton from one atom D) transfer of electrons from one atom to the other	A)
T/F? The more hydrogen bonds that you form, the more energy it will require to break them.	True
What is the name of the functional group shown in the figure? R-C=O -O-H A) carbonyl B) ketone C) aldehyde D) carboxyl	D)
Which functional group shown can pick up protons and raise the pH of the surrounding solution?	-NH2
Which of the functional groups shown helps stabilize proteins by forming covalent cross-links within or between protein molecules?	-SH
T/F? The function of a structure dictates its form.	False
The _____ reaction also goes by polymerization or dehydration reactions.	Condensation

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POB - Exam 1