Question 1

A type of organic compound that plays a role in both heredity and in energy delivery in cells is a ________.

Accepted Answer

The answer of A type of organic compound that plays...

Question 2

Based only on the following illustration,it could be predicted that ice floats on liquid water because

Accepted Answer

A)  the crystal structure of ice is more regular than that seen in liquid water. 
B)  the distance between water molecules in ice is greater than in liquid water. 
C)  the cool temperature of ice reduces the extent of molecular motion relative to liquid water. 
D)  when ice forms,the hydrogen bond in the water molecule becomes nonpolar;ice behaves like oil. 
A)  the crystal structure of ice is more regular than that seen in liquid water. 
B)  the distance between water molecules in ice is greater than in liquid water. 
C)  the cool temperature of ice reduces the extent of molecular motion relative to liquid water. 
D)  when ice forms,the hydrogen bond in the water molecule becomes nonpolar;ice behaves like oil.

Question 3

An atom of the element with the atomic number of 11 (which can form an ion)always contains 11

Accepted Answer

A)  neutrons. 
B)  nuclei. 
C)  electrons. 
D)  protons. 
A)  neutrons. 
B)  nuclei. 
C)  electrons. 
D)  protons.

Question 4

Which of the following is NOT a method used to tenderize meat?

Accepted Answer

A)  marinades with high pH 
B)  lemon juice,vinegar,or wine 
C)  brining or soaking in a salt water bath for several hours 
D)  pounding or grinding meat 
A)  marinades with high pH 
B)  lemon juice,vinegar,or wine 
C)  brining or soaking in a salt water bath for several hours 
D)  pounding or grinding meat

Question 5

The primary structure of a protein consists of its amino acid sequence.

Accepted Answer

A) True 
 B)False

Question 6

How many different elements would be needed to construct a molecule of C8H10N4O2?

Accepted Answer

A)  4 
B)  8 
C)  12 
D)  24 
A)  4 
B)  8 
C)  12 
D)  24

Question 7

The uncharged component in the core of an atom is a(n)________.

Accepted Answer

The answer of The uncharged component in the core of...

Question 8

The sum of an atom's protons and neutrons is its ________.

Accepted Answer

The answer of The sum of an atom's protons and...

Question 9

A scientist observed a chemical that changes to bright red in the presence of organic compounds containing nitrogen and phosphorus.To test this chemical,a set of test tubes is prepared,with each tube containing a purified sample of one of the following organic compounds.The chemical is then added to each tube.The test tube containing ________ will always turn bright red.

Accepted Answer

A)  nucleic acids 
B)  proteins 
C)  carbohydrates 
D)  phospholipids 
A)  nucleic acids 
B)  proteins 
C)  carbohydrates 
D)  phospholipids

Question 10

Phospholipids are found in cell membranes.

Accepted Answer

A) True 
 B)False

Question 11

Oxygen has six electrons in its outer shell that can hold up to eight electrons.As a result,oxygen will commonly form ________ covalent bonds.

Accepted Answer

The answer of Oxygen has six electrons in its outer...

Question 12

Inside a cell,the cytoplasm is generally maintained at a pH around 7.This might be so because

Accepted Answer

A)  buffers work best when the pH is close to 7. 
B)  humans are largely made up of water by weight. 
C)  most chemical reactions that occur in the cytoplasm can proceed optimally at pH 7. 
D)  ionic bonds cannot form at pH 7. 
A)  buffers work best when the pH is close to 7. 
B)  humans are largely made up of water by weight. 
C)  most chemical reactions that occur in the cytoplasm can proceed optimally at pH 7. 
D)  ionic bonds cannot form at pH 7.

Question 13

The following figure shows two hydrogen atoms.
 
How many covalent bonds will form between these two atoms?

Accepted Answer

A)  One 
B)  Two 
C)  Three 
D)  None;these atoms will form an ionic bond. 
A)  One 
B)  Two 
C)  Three 
D)  None;these atoms will form an ionic bond.

Question 14

The smallest unit of a chemical element that displays the properties of that element is a(n)

Accepted Answer

A)  amino acid. 
B)  molecule. 
C)  atom. 
D)  bond. 
A)  amino acid. 
B)  molecule. 
C)  atom. 
D)  bond.

Question 15

A monosaccharide is made up of several sugar molecules strung together.

Accepted Answer

A) True 
 B)False

Question 16

When phospholipids are added to water,they arrange themselves so that

Accepted Answer

A)  their hydrophobic tails are on the inside of a lipid droplet. 
B)  their hydrophilic tails are on the outside of a lipid droplet. 
C)  their hydrophobic heads are facing the water. 
D)  their hydrophilic heads are on the inside of a lipid droplet. 
A)  their hydrophobic tails are on the inside of a lipid droplet. 
B)  their hydrophilic tails are on the outside of a lipid droplet. 
C)  their hydrophobic heads are facing the water. 
D)  their hydrophilic heads are on the inside of a lipid droplet.

Question 17

Marinades that contain vinegar,wine,or yogurt are able to tenderize meat by breaking down collagen into smaller polypeptides because of their ________.

Accepted Answer

The answer of Marinades that contain vinegar,wine,or yogurt are able...

Question 18

A molecule composed of amino acids is a

Accepted Answer

A)  nucleotide. 
B)  lipid. 
C)  carbohydrate. 
D)  protein. 
A)  nucleotide. 
B)  lipid. 
C)  carbohydrate. 
D)  protein.

Question 19

Individual water molecules orient toward each other because of the ________ bonds that form between them.

Accepted Answer

A)  covalent 
B)  hydrogen 
C)  peptide 
D)  ionic 
A)  covalent 
B)  hydrogen 
C)  peptide 
D)  ionic

Question 20

Most lipids contain one or more of the long,hydrophobic hydrocarbon chains known as ________.

Accepted Answer

The answer of Most lipids contain one or more of...

Exam 2: The Chemistry of Life

A type of organic compound that plays a role in both heredity and in energy delivery in cells is a ________.

Based only on the following illustration,it could be predicted that ice floats on liquid water because

An atom of the element with the atomic number of 11 (which can form an ion)always contains 11

Which of the following is NOT a method used to tenderize meat?

The primary structure of a protein consists of its amino acid sequence.

How many different elements would be needed to construct a molecule of C8H10N4O2?

The uncharged component in the core of an atom is a(n)________.

The sum of an atom's protons and neutrons is its ________.

Phospholipids are found in cell membranes.

Oxygen has six electrons in its outer shell that can hold up to eight electrons.As a result,oxygen will commonly form ________ covalent bonds.

Inside a cell,the cytoplasm is generally maintained at a pH around 7.This might be so because

The following figure shows two hydrogen atoms. How many covalent bonds will form between these two atoms?

The smallest unit of a chemical element that displays the properties of that element is a(n)

A monosaccharide is made up of several sugar molecules strung together.

When phospholipids are added to water,they arrange themselves so that

Marinades that contain vinegar,wine,or yogurt are able to tenderize meat by breaking down collagen into smaller polypeptides because of their ________.

A molecule composed of amino acids is a

Individual water molecules orient toward each other because of the ________ bonds that form between them.

Most lipids contain one or more of the long,hydrophobic hydrocarbon chains known as ________.

The Nature of Science and the Characteristics of Life

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy, Metabolism, and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Cancer and Human Health

Patterns of Inheritance

Chromosomes and Human Genetics

DNA and Genes

From Gene to Protein

DNA Technology

How Evolution Works

The Origin of Species

The Evolution of Biodiversity

Biological Diversity, Bacteria, and Archaea

Protista, Plantae, and Fungi

Animalia

The Biosphere

Growth of Populations

Animal Behavior

Ecological Communities

Ecosystems

Global Change

Internal Organization and Homeostasis

Nutrition and Digestion

Circulation and Gas Exchange

Animal Hormones

Nervous and Sensory Systems

Skeletons,Muscles,and Movement

The Immune System

Reproduction and Development

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

Filters

How many different elements would be needed to construct a molecule of C₈H₁₀N₄O₂?