Question 1

Rank the elements carbon, sodium, calcium, and iodine in order of greatest abundance in living organisms.

Accepted Answer

The answer of Rank the elements carbon, sodium, calcium, and...

Question 2

Which one of the following elements is found in every organic molecule?

Accepted Answer

A)  carbon
B)  phosphorus
C)  nitrogen
D)  oxygen
E)  sulfur

Question 3

Water readily dissolves compounds that are referred to as:

Accepted Answer

A)  hydrophobic.
B)  solvent.
C)  nonpolar.
D)  hydrophilic.
E)  aqueous.

Question 4

_____ are the subunits of nucleic acids, and _____ are the subunits of proteins.

Accepted Answer

A)  Nucleotides; amino acids
B)  Bases; polypeptides
C)  Polypeptides; sugars
D)  Amino acids; nucleic bases
E)  Nucleoli; amino acids

Question 5

Rank the elements carbon, phosphorus, calcium, and iodine in order of decreasing number of energy shells/levels.

Accepted Answer

A)  CPCaI
B)  ICaPC
C)  IPCCa
D)  PCCaI

Question 6

Samples of three different triacylglycerols were tested to determine the melting point of each one. The results of the tests are shown in the graph.

The length of the fatty acids in A, B, and C is the same. Which of the three fatty acids is likely to have the MOST saturated fatty acids?

Accepted Answer

A)  A
B)  B
C)  C
D)  There is no way of knowing based on the information available.

Question 7

Which of the following ranks the elements carbon, sodium, calcium, and iodine in order of decreasing number of protons?

Accepted Answer

A)  CNaCaI
B)  ICaNaC
C)  ICCaNa
D)  CCaNaI

Question 8

Some species of insects are able to walk across liquid water because:

Accepted Answer

A)  of the high surface tension of water due to the hydrophobic effect.
B)  insects have a low center of gravity.
C)  of the higher density of liquid water compared to solid water.
D)  water has high surface tension due to ionic bonding.
E)  of the high surface tension of water due to its cohesion.

Question 9

Which one of the following statements about carbon is CORRECT?

Accepted Answer

A)  Each of carbon's three valence electrons shares a bond with another atom.
B)  Carbon-carbon single bonds allow for free rotation around the bond; carbon-carbon double bonds do not allow for free rotation around the bond.
C)  The spatial orientation of carbon's bonds results in a carbon atom resting in the center of a three-dimensional structure referred to as a hexahedron.
D)  Carbon is not only the most abundant element on Earth, but it is believed to be the most abundant element in the universe.
E)  Single bonds between carbon atoms are typically shorter than double bonds between carbon atoms.

Question 10

Refer to the periodic table, and decide which of the following molecules is held together by polar covalent bonds. 3 B) CO2 C) KCl" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  NH3
B)  CO2
C)  KCl

Question 11

Imagine you were there when Stanley Miller performed his experiment to produce the building blocks of life. If Miller originally identified 5 different amino acids, how many polypeptides that are 10 amino acids long could be made from just these 5 amino acids?

Accepted Answer

A)  5 × 10 = 50
B)  105 = 100,000
C)  510 = 9,765, 625
D)  The answer cannot be determined from the information provided.

Question 12

Because of hydrogen bonding, water is uniquely suited for its central role in life. Many hydrophilic molecules interact freely with water, but a number of hydrophobic molecules are important for life, too. How does the interaction between water and hydrophobic molecules help to organize biological systems?

Accepted Answer

A)  Because cells are not pure water (they have many substances dissolved within them) , the hydrophilic/hydrophobic effect has a limited role in biological organization.
B)  The ionic bonds between water molecules cause hydrophobic molecules to associate with each other and not with water molecules.
C)  Because water molecules preferentially associate with each other, they force hydrophobic molecules to associate with each other and not with water molecules.
D)  None of the other answer options is correct.

Question 13

The negatively charged components of atoms are referred to as:

Accepted Answer

A)  protons.
B)  electrons.
C)  anions.
D)  neutrons.
E)  cations.

Question 14

Samples of three different triacylglycerols were tested to determine the melting point of each one. The results of the tests are shown in the graph.  The length of the fatty acids in A, B, and C is the same. Which of the three triacylgcerols is likely to have the FEWEST number double bonds in the fatty acids?

Accepted Answer

A)  A
B)  B
C)  C
D)  There is no way of knowing based on the information available.

Question 15

Which of the following organic molecules is commonly used for energy storage?

Accepted Answer

A)  proteins and nucleic acids
B)  lipids and carbohydrates
C)  nucleic acids and lipids
D)  carbohydrates, nucleic acids, and lipids
E)  proteins, carbohydrates, and lipids

Question 16

Rank the elements carbon, sodium, calcium, and iodine in order of decreasing number of energy shells/levels.

Accepted Answer

The answer of Rank the elements carbon, sodium, calcium, and...

Question 17

Which one of the following MOST accurately describes the ratio of oxygen to carbon to hydrogen in a simple 6-carbon sugar such as glucose?

Accepted Answer

A)  1:2:1
B)  1:1:2
C)  2:1:1
D)  1:2:3
E)  1:3:2

Question 18

Which of the following statements about water is CORRECT?

Accepted Answer

A)  Ice is less dense than liquid water.
B)  Ice forms on top and sinks to the bottom of lakes and rivers.
C)  Ice is more dense than liquid water.
D)  Bodies of water freeze from the bottom up.
E)  Water molecules in ice demonstrate a disorganized, non-lattice arrangement.

Question 19

Match between columns
                        Premises: hydrogen bond in aqueous solution
covalent bond in aqueous solution
ionic bond in aqueous solution

Accepted Answer

The Answer of strong" and weak is...

Question 20

How many hydrogen atoms are present in a ring of six carbon atoms held together by alternating single and double bonds?

Accepted Answer

A)  6
B)  8
C)  10
D)  12

Exam 2: The Molecules of Life

How many hydrogen atoms are present in a ring of six carbon atoms held together by alternating single and double bonds?

Correct Answer
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Which one of the following elements is found in every organic molecule?

Correct Answer
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Some species of insects are able to walk across liquid water because:

Correct Answer
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Rank the elements carbon, phosphorus, calcium, and iodine in order of decreasing number of energy shells/levels.

Correct Answer
verified

Which of the following ranks the elements carbon, sodium, calcium, and iodine in order of decreasing number of protons?

Correct Answer
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Correct Answer
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Correct Answer
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Which of the following statements about water is CORRECT?

Correct Answer
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Rank the elements carbon, sodium, calcium, and iodine in order of greatest abundance in living organisms.

Correct Answer
verified

Complete the matching exercise below by choosing the CORRECT strength of each bond type in aqueous solution. Responses may be used once, more than once, or not at all.

Samples of three different triacylglycerols were tested to determine the melting point of each one. The results of the tests are shown in the graph. The length of the fatty acids in A, B, and C is the same. Which of the three fatty acids is likely to have the MOST saturated fatty acids?

Correct Answer
verified

Rank the elements carbon, sodium, calcium, and iodine in order of decreasing number of energy shells/levels.

Correct Answer
verified

Refer to the periodic table, and decide which of the following molecules is held together by polar covalent bonds.

Correct Answer
verified

The negatively charged components of atoms are referred to as:

Correct Answer
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_ are the subunits of nucleic acids, and _ are the subunits of proteins.

Correct Answer
verified

Imagine you were there when Stanley Miller performed his experiment to produce the building blocks of life. If Miller originally identified 5 different amino acids, how many polypeptides that are 10 amino acids long could be made from just these 5 amino acids?

Correct Answer
verified

Water readily dissolves compounds that are referred to as:

Correct Answer
verified

Which of the following organic molecules is commonly used for energy storage?

Correct Answer
verified

Which one of the following MOST accurately describes the ratio of oxygen to carbon to hydrogen in a simple 6-carbon sugar such as glucose?

Correct Answer
verified

Which one of the following statements about carbon is CORRECT?

Correct Answer
verified

Exam 2: The Molecules of Life

How many hydrogen atoms are present in a ring of six carbon atoms held together by alternating single and double bonds?

Correct AnswerverifiedShow Answer

Which one of the following elements is found in every organic molecule?

Correct AnswerverifiedShow Answer

Some species of insects are able to walk across liquid water because:

Correct AnswerverifiedShow Answer

Rank the elements carbon, phosphorus, calcium, and iodine in order of decreasing number of energy shells/levels.

Correct AnswerverifiedShow Answer

Which of the following ranks the elements carbon, sodium, calcium, and iodine in order of decreasing number of protons?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following statements about water is CORRECT?

Correct AnswerverifiedShow Answer

Rank the elements carbon, sodium, calcium, and iodine in order of greatest abundance in living organisms.

Correct AnswerverifiedShow Answer

Complete the matching exercise below by choosing the CORRECT strength of each bond type in aqueous solution. Responses may be used once, more than once, or not at all.

Samples of three different triacylglycerols were tested to determine the melting point of each one. The results of the tests are shown in the graph. The length of the fatty acids in A, B, and C is the same. Which of the three fatty acids is likely to have the MOST saturated fatty acids?

Correct AnswerverifiedShow Answer

Rank the elements carbon, sodium, calcium, and iodine in order of decreasing number of energy shells/levels.

Correct AnswerverifiedShow Answer

Refer to the periodic table, and decide which of the following molecules is held together by polar covalent bonds.

Correct AnswerverifiedShow Answer

The negatively charged components of atoms are referred to as:

Correct AnswerverifiedShow Answer

_____ are the subunits of nucleic acids, and _____ are the subunits of proteins.

Correct AnswerverifiedShow Answer

Imagine you were there when Stanley Miller performed his experiment to produce the building blocks of life. If Miller originally identified 5 different amino acids, how many polypeptides that are 10 amino acids long could be made from just these 5 amino acids?

Correct AnswerverifiedShow Answer

Water readily dissolves compounds that are referred to as:

Correct AnswerverifiedShow Answer

Which of the following organic molecules is commonly used for energy storage?

Correct AnswerverifiedShow Answer

Which one of the following MOST accurately describes the ratio of oxygen to carbon to hydrogen in a simple 6-carbon sugar such as glucose?

Correct AnswerverifiedShow Answer

Which one of the following statements about carbon is CORRECT?

Correct AnswerverifiedShow Answer

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_ are the subunits of nucleic acids, and _ are the subunits of proteins.

Correct Answer
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