Question 1

A substance that, when dissociated in water, will give off hydrogen ions is referred to as a(n) ________.

Accepted Answer

The answer of A substance that, when dissociated in water,...

Question 2

The hydrogen, ionic, and covalent bonds that stabilize the shape of a protein contribute to which level of structure of a protein?

Accepted Answer

A)  primary 
B)  quaternary 
C)  secondary 
D)  tertiary 
A)  primary 
B)  quaternary 
C)  secondary 
D)  tertiary

Question 3

Explain some of the modern uses for radioisotopes in society.

Accepted Answer

Radioisotopes can be used in a variety o

Question 4

Which of the following monomers is not paired correctly?

Accepted Answer

A)  glucose-carbohydrates 
B)  amino acids-proteins 
C)  nucleotides-nucleic acids 
D)  All of these are paired properly. 
A)  glucose-carbohydrates 
B)  amino acids-proteins 
C)  nucleotides-nucleic acids 
D)  All of these are paired properly.

Question 5

A neutral atom must contain ________.

Accepted Answer

A)  an equal number of protons and neutrons 
B)  an equal number of protons, neutrons, and electrons 
C)  an equal number of protons and electrons 
D)  an equal number of neutrons and electrons 
A)  an equal number of protons and neutrons 
B)  an equal number of protons, neutrons, and electrons 
C)  an equal number of protons and electrons 
D)  an equal number of neutrons and electrons

Question 6

The compound magnesium chloride (MgCl2) turns into one Mg2+ and two Cl- when placed in water. You can guess that the Mg and Cl atoms are held together normally by a(n) ________ bond.

Accepted Answer

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

Question 7

Partially hydrogenated fats are also referred to as ________ fats.

Accepted Answer

The answer of Partially hydrogenated fats are also referred to...

Question 8

These lipids have a hydrophobic part and a hydrophilic part.

Accepted Answer

A)  triglycerides 
B)  carotenoids 
C)  phospholipids 
D)  steroids 
A)  triglycerides 
B)  carotenoids 
C)  phospholipids 
D)  steroids

Question 9

By analyzing the chemical formulas, you can determine that this molecule, CH3CH(NH2)COOH, is a(n) ________, whereas the molecule C5H10O5 is a(n) ________.

Accepted Answer

A)  cholesterol; amino acid 
B)  amino acid; sugar 
C)  nucleotide; glycerol 
D)  fatty acid; sugar 
A)  cholesterol; amino acid 
B)  amino acid; sugar 
C)  nucleotide; glycerol 
D)  fatty acid; sugar

Question 10

In what ways are hydrogen bonds and ionic bonds similar?

Accepted Answer

A)  Both are based on attraction between atoms that carry differences in electrical charge. 
B)  Both are based on attraction between two atoms that carry negative charges. 
C)  Both are based on repulsion between atoms that carry differences in electrical charge. 
D)  Both involve an even sharing of electrons between atoms. 
E)  Both are based on attraction between two atoms that carry positive charges. 
A)  Both are based on attraction between atoms that carry differences in electrical charge. 
B)  Both are based on attraction between two atoms that carry negative charges. 
C)  Both are based on repulsion between atoms that carry differences in electrical charge. 
D)  Both involve an even sharing of electrons between atoms. 
E)  Both are based on attraction between two atoms that carry positive charges.

Question 11

A molecule consists of a long chain of glucose monomers linked by covalent bonds and serves as an energy source for plants and animals. Which of the following would describe this molecule?

Accepted Answer

A)  polysaccharide 
B)  oligosaccharide 
C)  monosaccharide 
D)  sucrose 
A)  polysaccharide 
B)  oligosaccharide 
C)  monosaccharide 
D)  sucrose

Question 12

Explain the major differences between covalent and ionic bonding.

Accepted Answer

In covalent bonding, atoms sha

Question 13

Athletes are often told to eat starch before a strenuous athletic event. What monomer can be released from starch after hydrolysis, and what is it used for? Because cellulose (fiber) is made of the same type of monomer as starch, why aren't athletes told to eat fiber before an event?

Accepted Answer

When starch is broken down, glucose is r

Question 14

You received your genetic material from your parents in the form of DNA. Your DNA provides your cells with instruction for making ________.

Accepted Answer

A)  lipids 
B)  proteins 
C)  polysaccharides 
D)  cholesterol 
A)  lipids 
B)  proteins 
C)  polysaccharides 
D)  cholesterol

Question 15

Saturated fatty acids are so named because they are saturated with ________.

Accepted Answer

A)  hydrogen 
B)  nitrogen 
C)  carbon 
D)  oxygen 
A)  hydrogen 
B)  nitrogen 
C)  carbon 
D)  oxygen

Question 16

The pH scale measures ________.

Accepted Answer

A)  OH- concentration 
B)  buffer concentration 
C)  H+ concentration 
D)  All of the above are true. 
A)  OH- concentration 
B)  buffer concentration 
C)  H+ concentration 
D)  All of the above are true.

Question 17

________ refers to a structure of a protein in which two or more polypeptide chains bind together to form a functional protein.

Accepted Answer

The answer of ________ refers to a structure of a...

Question 18

Triglycerides ________.

Accepted Answer

A)  are fatty acids bonded to glycerol through hydrolysis 
B)  have solid unsaturated forms at room temperature, such as butter 
C)  can provide twice the energy per gram than proteins 
D)  All of the above are true. 
A)  are fatty acids bonded to glycerol through hydrolysis 
B)  have solid unsaturated forms at room temperature, such as butter 
C)  can provide twice the energy per gram than proteins 
D)  All of the above are true.

Question 19

The Cl- ion has a single negative charge and the atomic number of 17. How many electrons are on its innermost shell?

Accepted Answer

A)  18 
B)  17 
C)  9 
D)  2 
A)  18 
B)  17 
C)  9 
D)  2

Question 20

A researcher suspects that the food in an ecosystem has been contaminated with radioactive phosphates over a period of months. Which of the following substances could be examined for radioactive phosphate to test the hypothesis?

Accepted Answer

A)  the amino acids within proteins produced by organisms living in the area 
B)  the starch produced by plants in the area 
C)  the DNA of the organisms in the area 
D)  All of the above are true. 
A)  the amino acids within proteins produced by organisms living in the area 
B)  the starch produced by plants in the area 
C)  the DNA of the organisms in the area 
D)  All of the above are true.

Exam 3: Chemistry Comes to Life

A substance that, when dissociated in water, will give off hydrogen ions is referred to as a(n) ________.

The hydrogen, ionic, and covalent bonds that stabilize the shape of a protein contribute to which level of structure of a protein?

Explain some of the modern uses for radioisotopes in society.

Which of the following monomers is not paired correctly?

A neutral atom must contain ________.

The compound magnesium chloride (MgCl2) turns into one Mg2+ and two Cl- when placed in water. You can guess that the Mg and Cl atoms are held together normally by a(n) ________ bond.

Partially hydrogenated fats are also referred to as ________ fats.

These lipids have a hydrophobic part and a hydrophilic part.

By analyzing the chemical formulas, you can determine that this molecule, CH3CH(NH2)COOH, is a(n) ________, whereas the molecule C5H10O5 is a(n) ________.

In what ways are hydrogen bonds and ionic bonds similar?

A molecule consists of a long chain of glucose monomers linked by covalent bonds and serves as an energy source for plants and animals. Which of the following would describe this molecule?

Explain the major differences between covalent and ionic bonding.

Athletes are often told to eat starch before a strenuous athletic event. What monomer can be released from starch after hydrolysis, and what is it used for? Because cellulose (fiber) is made of the same type of monomer as starch, why aren't athletes told to eat fiber before an event?

You received your genetic material from your parents in the form of DNA. Your DNA provides your cells with instruction for making ________.

Saturated fatty acids are so named because they are saturated with ________.

The pH scale measures ________.

________ refers to a structure of a protein in which two or more polypeptide chains bind together to form a functional protein.

Triglycerides ________.

The Cl- ion has a single negative charge and the atomic number of 17. How many electrons are on its innermost shell?

A researcher suspects that the food in an ecosystem has been contaminated with radioactive phosphates over a period of months. Which of the following substances could be examined for radioactive phosphate to test the hypothesis?

Humans in the World of Biology

Becoming a Patient: a Major Decision

The Cell

Body Organization and Homeostasis

The Skeletal System

The Muscular System

Neurons: the Matter of the Mind

The Nervous System

Special Topic: Drugs and the Mind

Sensory Systems

The Endocrine System

Special Topic: Diabetes Mellitus

Blood

The Cardiovascular and Lymphatic Systems

Special Topic: Cardiovascular Disease

Body Defense Mechanisms

Special Topic: Infectious Disease

The Respiratory System

The Digestive System and Nutrition

Special Topic: the Obesity Epidemic

The Urinary System

Reproductive Systems

Special Topic: Sexually Transmitted Diseases and Aids

Development Throughout Life

Special Topic: Autism Spectrum Disorder

Chromosomes and Cell Division

Stem Cellsa Repair Kit for the Body

Genetics and Human Inheritance

DNA and Biotechnology

Special Topic: Cancer

Evolution and Our Heritage

Ecology, the Environment, and Us

Human Population, Limited Resources, and Pollution

Filters

The compound magnesium chloride (MgCl₂) turns into one Mg²⁺ and two Cl^- when placed in water. You can guess that the Mg and Cl atoms are held together normally by a(n) ________ bond.

By analyzing the chemical formulas, you can determine that this molecule, CH₃CH(NH₂)COOH, is a(n) , whereas the molecule C₅H₁₀O₅ is a(n) .

The Cl^- ion has a single negative charge and the atomic number of 17. How many electrons are on its innermost shell?