Question 1

The term polar is used to describe molecules because

Accepted Answer

A)  polar covalent molecules are found in colder climates. 
B)  polar covalent molecules were first discovered in polar bears. 
C)  there are at least two distinct ends of the molecule regarding electron position and the resulting charge. 
D)  there are at least two distinct ends of the molecule regarding hydrogen placement. 
E)  such molecules are always linear in shape. 
A)  polar covalent molecules are found in colder climates. 
B)  polar covalent molecules were first discovered in polar bears. 
C)  there are at least two distinct ends of the molecule regarding electron position and the resulting charge. 
D)  there are at least two distinct ends of the molecule regarding hydrogen placement. 
E)  such molecules are always linear in shape.

Question 2

Electrons travel around the center of the atom at high speed forming a(n)________.

Accepted Answer

The answer of Electrons travel around the center of the...

Question 3

Sydney Student is trying to memorize chemical structures of every compound his professor has indicated are important to the human body.Explain to him that an easier way is to memorize a few rules of chemical bonding and then figure out the structure of the important compounds,especially the simpler compounds.

Accepted Answer

Elements combine to form molecules in pr

Question 4

Stanley Student is confused on the similarities and differences between proteins and nucleic acids.Assuming he has learned and understood the basic chemistry,what is the likely source of his confusion? To help him sort this out,make a table or flow chart to explain the structure of these molecules and their relationship to each other.

Accepted Answer

His confusion probably stems from the fa

Question 5

Which of the following is NOT considered an essential element for a living organism?

Accepted Answer

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

Question 6

List and briefly describe the seven categories of soluble proteins.

Accepted Answer

The seven categories: enzymes,

Question 7

In a chemical reaction,________ between atoms are broken as atoms are rearranged in new combinations to form different chemical substances.

Accepted Answer

The answer of In a chemical reaction,________ between atoms are...

Question 8

Match the symbol with the correct element:
-C

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 9

The pyrimidines found in DNA are ________ and ________.

Accepted Answer

The answer of The pyrimidines found in DNA are ________...

Question 10

Glycoprotein molecules

Accepted Answer

A)  act as receptors on the surface of cell membranes. 
B)  function as cell markers. 
C)  are present in the secretions coating the respiratory tract. 
D)  function as hormones from the pancreas. 
E)  act as receptors on the surface of cell membranes and function as cell markers. 
A)  act as receptors on the surface of cell membranes. 
B)  function as cell markers. 
C)  are present in the secretions coating the respiratory tract. 
D)  function as hormones from the pancreas. 
E)  act as receptors on the surface of cell membranes and function as cell markers.

Question 11

All of these statements about carbohydrates are true except one.Identify the exception.

Accepted Answer

A)  Simple sugars include lactose, glucose, and ribose. 
B)  Cellulose is the most abundant carbohydrate on earth. 
C)  Glycogen is a storage polysaccharide made by animal cells. 
D)  Polysaccharides are important both for energy storage and to provide structure to cells. 
E)  Glycogen is important both for energy storage and to provide structure for cells. 
A)  Simple sugars include lactose, glucose, and ribose. 
B)  Cellulose is the most abundant carbohydrate on earth. 
C)  Glycogen is a storage polysaccharide made by animal cells. 
D)  Polysaccharides are important both for energy storage and to provide structure to cells. 
E)  Glycogen is important both for energy storage and to provide structure for cells.

Question 12

If in an acid-base reaction H2SO42- donates two H+,one mole of H2SO42- would equal how many equivalents?

Accepted Answer

A)  0.75 
B)  1 
C)  4 
D)  0.5 
E)  2 
A)  0.75 
B)  1 
C)  4 
D)  0.5 
E)  2

Question 13

Chromium is

Accepted Answer

A)  a major essential element. 
B)  a minor essential element. 
C)  a dietary supplement with no natural role in the body. 
D)  None of the answers are correct. 
A)  a major essential element. 
B)  a minor essential element. 
C)  a dietary supplement with no natural role in the body. 
D)  None of the answers are correct.

Question 14

Match the symbol with the correct element:
-lead

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 15

Match the symbol with the correct element:
-phosphorus

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 16

Which group of elements makes up more than 90% of the body's mass?

Accepted Answer

A)  O, H, Na 
B)  C, Na, K 
C)  O, Ca, H 
D)  Ca, C, O 
E)  O, C, H 
A)  O, H, Na 
B)  C, Na, K 
C)  O, Ca, H 
D)  Ca, C, O 
E)  O, C, H

Question 17

If the dissociation constant of a protein is less than one (Kd < 1),what can you conclude about the affinity of the protein for the ligand?

Accepted Answer

Since Kd < 1,you know that [P][L] < [PL]

Question 18

When a nitrogenous base is bonded to a pentose sugar and a phosphate,a ________ is formed.

Accepted Answer

The answer of When a nitrogenous base is bonded to...

Question 19

100 mg/dL is a typical blood concentration of glucose.The molecular weight of glucose is approximately 180 daltons.What is the molarity of this solution in millimoles?

Accepted Answer

A)  100 
B)  10 
C)  0.56 
D)  18 
E)  5.6 
A)  100 
B)  10 
C)  0.56 
D)  18 
E)  5.6

Question 20

Which bases below are purines?
1)adenine
2)cytosine
3)guanine
4)thymine
5)uracil

Accepted Answer

A)  1 and 2 
B)  2 and 3 
C)  1, 3, and 5 
D)  1 and 3 
E)  2, 4, and 5 
A)  1 and 2 
B)  2 and 3 
C)  1, 3, and 5 
D)  1 and 3 
E)  2, 4, and 5

Exam 2: Molecular Interactions

The term polar is used to describe molecules because

Electrons travel around the center of the atom at high speed forming a(n)________.

Which of the following is NOT considered an essential element for a living organism?

List and briefly describe the seven categories of soluble proteins.

In a chemical reaction,________ between atoms are broken as atoms are rearranged in new combinations to form different chemical substances.

Match the symbol with the correct element: -C

The pyrimidines found in DNA are ________ and ________.

Glycoprotein molecules

All of these statements about carbohydrates are true except one.Identify the exception.

If in an acid-base reaction H2SO42- donates two H+,one mole of H2SO42- would equal how many equivalents?

Chromium is

Match the symbol with the correct element: -lead

Match the symbol with the correct element: -phosphorus

Which group of elements makes up more than 90% of the body's mass?

If the dissociation constant of a protein is less than one (Kd < 1),what can you conclude about the affinity of the protein for the ligand?

When a nitrogenous base is bonded to a pentose sugar and a phosphate,a ________ is formed.

100 mg/dL is a typical blood concentration of glucose.The molecular weight of glucose is approximately 180 daltons.What is the molarity of this solution in millimoles?

Which bases below are purines? 1)adenine 2)cytosine 3)guanine 4)thymine 5)uracil

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

The pyrimidines found in DNA are and .

If in an acid-base reaction H₂SO₄^2- donates two H⁺,one mole of H₂SO₄^2-would equal how many equivalents?