Question 1

Which of the following is a common feature of soluble proteins?

Accepted Answer

A)  structural support 
B)  noncovalent interaction 
C)  receptor binding 
D)  chemical modulation 
E)  All of the answers are correct. 
A)  structural support 
B)  noncovalent interaction 
C)  receptor binding 
D)  chemical modulation 
E)  All of the answers are correct.

Question 2

For the following questions,match the type of modulator with the best description below.
-competitive inhibitor

Accepted Answer

A) involved in phosphorylation 
B) cannot be displaced by competition 
C) bind to proteins away from the active site 
D) reversible antagonist 
A) involved in phosphorylation 
B) cannot be displaced by competition 
C) bind to proteins away from the active site 
D) reversible antagonist

Question 3

Match the symbol with the correct element:
-calcium

Accepted Answer

A) P 
B) Na 
C) Ca 
D) C 
E) K
F)Pb 
A) P 
B) Na 
C) Ca 
D) C 
E) K
F)Pb

Question 4

Write the chemical formula for the molecule drawn below.Which class of organic molecule does it belong to? Is it most likely polar or nonpolar?

Accepted Answer

C₁₁H₁₂N₂O₂.The presence of the carbo

Question 5

How many grams of glucose,m.w.180 daltons,is necessary to make 1 liter of a 1.0 molar solution?

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 6

In a 5% NaCl solution,

Accepted Answer

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

Question 7

If 100 mL of water contains 5 grams of NaCl,m.w.58.5 daltons,what is the molarity of the solution in moles/L?

Accepted Answer

A)  0.05 
B)  0.85 
C)  2.92 
D)  0.085 
E)  0.25 
A)  0.05 
B)  0.85 
C)  2.92 
D)  0.085 
E)  0.25

Question 8

Explain the general chemical structure for monosaccharides and amino acids.

Accepted Answer

Monosaccharides consist of carbon,hydrog

Question 9

Lipids are hydrophobic,and do not usually dissolve in water.Because blood is water-based,the lipid cholesterol is combined with ________ so that it can be transported by blood.

Accepted Answer

A)  a hydrophilic molecule 
B)  a hydrophobic molecule 
C)  nothing; cholesterol is not transported in blood 
D)  a cation 
E)  an anion 
A)  a hydrophilic molecule 
B)  a hydrophobic molecule 
C)  nothing; cholesterol is not transported in blood 
D)  a cation 
E)  an anion

Question 10

Chemical reactions that occur in the human body proceed at a faster rate due to special catalytic molecules called

Accepted Answer

A)  enzymes. 
B)  cytozymes. 
C)  cofactors. 
D)  activators. 
E)  None of the answers are correct. 
A)  enzymes. 
B)  cytozymes. 
C)  cofactors. 
D)  activators. 
E)  None of the answers are correct.

Question 11

Sally Student 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 12

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 13

A 5 M solution of 100 mL of glucose contains how many grams of glucose,m.w.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 14

If a polypeptide contains 10 peptide bonds,how many amino acids does it contain?

Accepted Answer

A)  0 
B)  5 
C)  10 
D)  11 
E)  12 
A)  0 
B)  5 
C)  10 
D)  11 
E)  12

Question 15

Describe what happens to NaCl when placed in water.

Accepted Answer

Water molecules break the ionic bonds ho

Question 16

Two methods of protein activation include ________ and ________.

Accepted Answer

proteolytic (removal

Question 17

A positively charged ion is called a(n)

Accepted Answer

A)  electron. 
B)  proton. 
C)  neutron. 
D)  cation. 
E)  anion. 
A)  electron. 
B)  proton. 
C)  neutron. 
D)  cation. 
E)  anion.

Question 18

What is the pH of a 0.005 M HCl solution? Assume complete dissociation.

Accepted Answer

pH = 2.3.If pH = - log [H⁺] and

Question 19

When an enzyme reaches its saturation point,

Accepted Answer

A)  the amount of substrate for the enzyme to act upon is very high. 
B)  the amount of substrate for the enzyme to act upon is very low. 
C)  the amount of product produced continues to increase. 
D)  the amount of product produced by the enzyme decreases. 
E)  the amount of substrate for the enzyme to act upon is very low and the amount of product produced by the enzyme decreases. 
A)  the amount of substrate for the enzyme to act upon is very high. 
B)  the amount of substrate for the enzyme to act upon is very low. 
C)  the amount of product produced continues to increase. 
D)  the amount of product produced by the enzyme decreases. 
E)  the amount of substrate for the enzyme to act upon is very low and the amount of product produced by the enzyme decreases.

Question 20

In the equation CO2 + H2O H2CO3 H+ + HCO3-, which of these is an acid?

Accepted Answer

A)  HCO3- 
B)  H2CO3 
C)  H2O 
D)  CO2 
E)  H+ 
A)  HCO3- 
B)  H2CO3 
C)  H2O 
D)  CO2 
E)  H+

Exam 2: Molecular Interactions

Which of the following is a common feature of soluble proteins?

For the following questions,match the type of modulator with the best description below. -competitive inhibitor

Match the symbol with the correct element: -calcium

Write the chemical formula for the molecule drawn below.Which class of organic molecule does it belong to? Is it most likely polar or nonpolar?

How many grams of glucose,m.w.180 daltons,is necessary to make 1 liter of a 1.0 molar solution?

In a 5% NaCl solution,

If 100 mL of water contains 5 grams of NaCl,m.w.58.5 daltons,what is the molarity of the solution in moles/L?

Explain the general chemical structure for monosaccharides and amino acids.

Lipids are hydrophobic,and do not usually dissolve in water.Because blood is water-based,the lipid cholesterol is combined with ________ so that it can be transported by blood.

Chemical reactions that occur in the human body proceed at a faster rate due to special catalytic molecules called

Sally Student 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.

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

A 5 M solution of 100 mL of glucose contains how many grams of glucose,m.w.180 daltons?

If a polypeptide contains 10 peptide bonds,how many amino acids does it contain?

Describe what happens to NaCl when placed in water.

Two methods of protein activation include ________ and ________.

A positively charged ion is called a(n)

What is the pH of a 0.005 M HCl solution? Assume complete dissociation.

When an enzyme reaches its saturation point,

In the equation CO2 + H2O H2CO3 H+ + HCO3-, which of these is an acid?

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

Two methods of protein activation include and .

In the equation CO₂ + H₂O H₂CO₃ H⁺ + HCO₃^-,which of these is an acid?