Question 1

The weak interactions between atoms that keep atoms near each other are called

Accepted Answer

A)  hydrogen bonds. 
B)  van der Waals forces. 
C)  ionic bonds. 
D)  hydrogen bonds and van der Waals forces. 
E)  van der Waals forces and ionic bonds. 
A)  hydrogen bonds. 
B)  van der Waals forces. 
C)  ionic bonds. 
D)  hydrogen bonds and van der Waals forces. 
E)  van der Waals forces and ionic bonds.

Question 2

Sally does not understand the differences between ions, isotopes, and free radicals.Assuming she has learned and understood some basic chemistry, what is the likely source of her confusion? Review the definitions of these terms, then make a table or flow chart to help her sort this out.

Accepted Answer

Her confusion may arise from the fact th

Question 3

Potassium channels are usually composed of several subunits.This is an example of which level of protein structure?

Accepted Answer

A)  primary 
B)  secondary 
C)  teritiary 
D)  quaternary 
E)  alpha helix 
A)  primary 
B)  secondary 
C)  teritiary 
D)  quaternary 
E)  alpha helix

Question 4

The alpha-helix and pleated sheet are examples of the ________ structure of a protein.

Accepted Answer

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

Question 5

Which of the following results when an atom has such a strong attraction for electrons that it pulls one or more electrons completely away from another atom?

Accepted Answer

A)  a Van der Waals attraction 
B)  an ionic bond 
C)  a hydrogen bond 
D)  a covalent bond 
E)  a very stable bond 
A)  a Van der Waals attraction 
B)  an ionic bond 
C)  a hydrogen bond 
D)  a covalent bond 
E)  a very stable bond

Question 6

Chromium is

Accepted Answer

A)  not an element in the periodic table. 
B)  a protein. 
C)  a dietary supplement with no natural role in the body. 
D)  an essential element involved in glucose metabolism. 
A)  not an element in the periodic table. 
B)  a protein. 
C)  a dietary supplement with no natural role in the body. 
D)  an essential element involved in glucose metabolism.

Question 7

Which of the following are examples of cations?

Accepted Answer

A)  SO₄²⁻ 
B)  Ca²⁺ 
C)  HPO₄²⁻ 
D)  HCO₃⁻ 
E)  Cl⁻ 
A)  SO₄²⁻ 
B)  Ca²⁺ 
C)  HPO₄²⁻ 
D)  HCO₃⁻ 
E)  Cl⁻

Question 8

Compare and contrast the general chemical structures of monosaccharides and amino acids.

Accepted Answer

Monosaccharides consist of carbon, hydro

Question 9

A double covalent bond is formed when atoms

Accepted Answer

A)  share one pair of electrons (a total of two). 
B)  share two pairs of electrons (a total of four). 
C)  swap two pairs of electrons. 
D)  transfer a pair of electrons from one atom to the other. 
E)  transfer two pairs of electrons from one atom to the other. 
A)  share one pair of electrons (a total of two). 
B)  share two pairs of electrons (a total of four). 
C)  swap two pairs of electrons. 
D)  transfer a pair of electrons from one atom to the other. 
E)  transfer two pairs of electrons from one atom to the other.

Question 10

If a substance has a pH that is less than 7, it is considered

Accepted Answer

A)  neutral. 
B)  acidic. 
C)  alkaline. 
D)  a buffer. 
E)  a salt. 
A)  neutral. 
B)  acidic. 
C)  alkaline. 
D)  a buffer. 
E)  a salt.

Question 11

Your swimming buddy, Mario, jumped into a pool parallel to the water surface.When he stood up, he yelled "ouch," and you noticed that the skin on his chest and belly looked red and irritated.How would you describe the properties of water to explain to Mario why this happened? Why doesn't it hurt when pool water is penetrated perpendicular to the surface, as with a hands-first or feet-first dive?

Accepted Answer

Because Mario was parallel to the water

Question 12

Proteins are described as having different levels of structure.List and distinguish between the level(s)that produce a linear shape vs.a globular shape, and explain why one of those levels can result in either a linear or globular shape.

Accepted Answer

Linear shapes: primary, secondary, quate

Question 13

To which of the following groups of biomolecules do triglycerides and steroids belong?

Accepted Answer

A)  carbohydrates 
B)  lipids 
C)  proteins 
D)  nucleotides 
E)  lipids and proteins 
A)  carbohydrates 
B)  lipids 
C)  proteins 
D)  nucleotides 
E)  lipids and proteins

Question 14

What is the difference between atomic mass and molecular mass.

Accepted Answer

The atomic mass is the actual mass of an

Question 15

Cholesterol is a

Accepted Answer

A)  precursor to steroid hormones. 
B)  structural component of cell membranes. 
C)  dangerous fat that is absent from a healthy body. 
D)  precursor to steroid hormones and a structural component of cell membranes. 
E)  precursor to steroid hormones, a structural component of cell membranes, and a dangerous fat that is absent from a healthy body. 
A)  precursor to steroid hormones. 
B)  structural component of cell membranes. 
C)  dangerous fat that is absent from a healthy body. 
D)  precursor to steroid hormones and a structural component of cell membranes. 
E)  precursor to steroid hormones, a structural component of cell membranes, and a dangerous fat that is absent from a healthy body.

Question 16

A 5 M solution of 100 mL of glucose contains how many grams of glucose, molecular mass = 180 Daltons?

Accepted Answer

A)  180 
B)  360 
C)  90 
D)  6.02 × 10²³ 
E)  1.0 
A)  180 
B)  360 
C)  90 
D)  6.02 × 10²³ 
E)  1.0

Question 17

How many grams of NaCl, molecular mass = 58.5 Daltons, are the molar equivalent to 90 g of glucose (molecular mass = 180 daltons)?

Accepted Answer

A)  0.25 
B)  0.5 
C)  29.25 
D)  117 
E)  14.6 
A)  0.25 
B)  0.5 
C)  29.25 
D)  117 
E)  14.6

Question 18

Molecules that do not dissolve well in water are called

Accepted Answer

A)  hydrophobic. 
B)  hydrophilic. 
C)  isotonic. 
D)  polar. 
E)  salts. 
A)  hydrophobic. 
B)  hydrophilic. 
C)  isotonic. 
D)  polar. 
E)  salts.

Question 19

A(n)________ is a substance that consists entirely of atoms with the same atomic number.

Accepted Answer

A)  atom 
B)  molecule 
C)  element 
D)  nucleus 
E)  tissue 
A)  atom 
B)  molecule 
C)  element 
D)  nucleus 
E)  tissue

Question 20

In a 5% NaCl solution,

Accepted Answer

A)  there are 5 grams of sodium chloride for every 100 mL of water. 
B)  there are 5 grams of sodium chloride for every 100 mL of total solution. 
C)  the solute is water. 
D)  there are 5 grams of sodium chloride for every 100 mL of water and there are 5 grams of sodium chloride for every 100 mL of total solution. 
E)  there are 5 grams of sodium chloride for every 100 mL of total solution and the solute is water. 
A)  there are 5 grams of sodium chloride for every 100 mL of water. 
B)  there are 5 grams of sodium chloride for every 100 mL of total solution. 
C)  the solute is water. 
D)  there are 5 grams of sodium chloride for every 100 mL of water and there are 5 grams of sodium chloride for every 100 mL of total solution. 
E)  there are 5 grams of sodium chloride for every 100 mL of total solution and the solute is water.

Exam 2: Molecular Interactions

The weak interactions between atoms that keep atoms near each other are called

Sally does not understand the differences between ions, isotopes, and free radicals.Assuming she has learned and understood some basic chemistry, what is the likely source of her confusion? Review the definitions of these terms, then make a table or flow chart to help her sort this out.

Potassium channels are usually composed of several subunits.This is an example of which level of protein structure?

The alpha-helix and pleated sheet are examples of the ________ structure of a protein.

Which of the following results when an atom has such a strong attraction for electrons that it pulls one or more electrons completely away from another atom?

Chromium is

Which of the following are examples of cations?

Compare and contrast the general chemical structures of monosaccharides and amino acids.

A double covalent bond is formed when atoms

If a substance has a pH that is less than 7, it is considered

Proteins are described as having different levels of structure.List and distinguish between the level(s)that produce a linear shape vs.a globular shape, and explain why one of those levels can result in either a linear or globular shape.

To which of the following groups of biomolecules do triglycerides and steroids belong?

What is the difference between atomic mass and molecular mass.

Cholesterol is a

A 5 M solution of 100 mL of glucose contains how many grams of glucose, molecular mass = 180 Daltons?

How many grams of NaCl, molecular mass = 58.5 Daltons, are the molar equivalent to 90 g of glucose (molecular mass = 180 daltons)?

Molecules that do not dissolve well in water are called

A(n)________ is a substance that consists entirely of atoms with the same atomic number.

In a 5% NaCl solution,

Introduction to Physiology

Compartmentation: Cells and Tissues

Energy and Cellular Metabolism

Membrane Dynamics

Communication, Integration, and Homeostasis

Introduction to the Endocrine System

Neurons: Cellular and Network Properties

The Central Nervous System

Sensory Physiology

Efferent Division: Autonomic and Somatic Motor Control

Muscles

Integrative Physiology I: Control of Body Movement

Cardiovascular Physiology

Blood Flow and the Control of Blood Pressure

Blood

Mechanics of Breathing

Gas Exchange and Transport

The Kidneys

Integrative Physiology II: Fluid and Electrolyte Balance

The Digestive System

Metabolism and Energy Balance

Endocrine Control of Growth and Metabolism

The Immune System

Integrative Physiology III: Exercise

Reproduction and Development

Filters