Question 1

A chemical bond never occurs between components of a mixture. Discuss this.

Accepted Answer

Mixtures come in three forms-solutions,

Question 2

What is the major difference between polar and nonpolar covalent bonds?

Accepted Answer

Polar bonds have an unequal sharing of e

Question 3

Figure 2.1Using Figure 2.1, match the following:
-Nucleotide

Accepted Answer

The answer of   Figure 2.1Using Figure 2.1, match...

Question 4

The fact that no chemical bonding occurs between the components of a mixture is the chief difference between mixtures and compounds.

Accepted Answer

A) True 
 B)False

Question 5

The lower the pH, the higher the hydrogen ion concentration.

Accepted Answer

A) True 
 B)False

Question 6

Choose the answer that best describes fibrous proteins.

Accepted Answer

A)  are cellular catalysts 
B)  are very stable and insoluble in water 
C)  are usually called enzymes 
D)  rarely exhibit secondary structure 
A)  are cellular catalysts 
B)  are very stable and insoluble in water 
C)  are usually called enzymes 
D)  rarely exhibit secondary structure

Question 7

The chemical symbol O=O means _ .

Accepted Answer

A)  the atoms are double bonded 
B)  this is an ionic bond with two shared electrons 
C)  zero equals zero 
D)  both atoms are bonded and have zero electrons in the outer orbit 
A)  the atoms are double bonded 
B)  this is an ionic bond with two shared electrons 
C)  zero equals zero 
D)  both atoms are bonded and have zero electrons in the outer orbit

Question 8

Figure 2.1Using Figure 2.1, match the following:
-have a bitter taste, feel slippery, and are proton acceptors.

Accepted Answer

The answer of   Figure 2.1Using Figure 2.1, match...

Question 9

Isotopes differ from each other only in the number of electrons the atom contains.

Accepted Answer

A) True 
 B)False

Question 10

Choose the answer that best describes HCO3- .

Accepted Answer

A)  a weak acid 
B)  a bicarbonate ion 
C)  common in the liver 
D)  a proton donor 
A)  a weak acid 
B)  a bicarbonate ion 
C)  common in the liver 
D)  a proton donor

Question 11

31) You notice that you cannot read your book through a test tube of patient fluid held against the print, making it so blurred as to be unreadable. There is no precipitant in the bottom of the beaker, though it has been sitting for several days in a rack. What type of liquid is this?

Accepted Answer

A)  suspension 
B)  colloid 
C)  mixture 
D)  solution 
A)  suspension 
B)  colloid 
C)  mixture 
D)  solution

Question 12

What does the formula C6H12O6 mean?

Accepted Answer

A)  The molecular weight is 24. 
B)  The substance is a colloid. 
C)  There are 6 calcium, 12 hydrogen, and 6 oxygen atoms. 
D)  There are, 6 carbon, 12 hydrogen, and 6 oxygen atoms. 
A)  The molecular weight is 24. 
B)  The substance is a colloid. 
C)  There are 6 calcium, 12 hydrogen, and 6 oxygen atoms. 
D)  There are, 6 carbon, 12 hydrogen, and 6 oxygen atoms.

Question 13

What happens in redox reactions?

Accepted Answer

A)  the organic substance that loses hydrogen is usually reduced 
B)  the electron acceptor is oxidized 
C)  the reaction is uniformly reversible 
D)  both decomposition and electron exchange occur 
A)  the organic substance that loses hydrogen is usually reduced 
B)  the electron acceptor is oxidized 
C)  the reaction is uniformly reversible 
D)  both decomposition and electron exchange occur

Question 14

How can DNA be used to "fingerprint" a suspect in a crime?

Accepted Answer

The DNA of a person is unique to that in

Question 15

Which of the following elements is necessary for proper conduction of nervous impulses?

Accepted Answer

A)  Na 
B)  I 
C)  Fe 
D)  P 
A)  Na 
B)  I 
C)  Fe 
D)  P

Question 16

A dipeptide can be broken into two amino acids by dehydration synthesis.

Accepted Answer

A) True 
 B)False

Question 17

The genetic information is coded in DNA by the .

Accepted Answer

A)  regular alteration of sugar and phosphate molecules 
B)  arrangement of the histones 
C)  three- dimensional structure of the double helix 
D)  sequence of the nucleotides 
A)  regular alteration of sugar and phosphate molecules 
B)  arrangement of the histones 
C)  three- dimensional structure of the double helix 
D)  sequence of the nucleotides

Question 18

A chemical reaction in which bonds are broken is usually associated with .

Accepted Answer

A)  a synthesis 
B)  forming a larger molecule 
C)  the release of energy 
D)  the consumption of energy 
A)  a synthesis 
B)  forming a larger molecule 
C)  the release of energy 
D)  the consumption of energy

Question 19

Hydrogen bonds are more like a type of weak than correct bonds.

Accepted Answer

The answer of Hydrogen bonds are more like a type...

Question 20

Which of the following is not true of proteins?

Accepted Answer

A)  They have both functional and structural roles in the body.. 
B)  They appear to be the molecular carriers of coded hereditary information. 
C)  Their function depends on their three- dimensional shape. 
D)  They may be denatured or coagulated by heat or acidity. 
A)  They have both functional and structural roles in the body.. 
B)  They appear to be the molecular carriers of coded hereditary information. 
C)  Their function depends on their three- dimensional shape. 
D)  They may be denatured or coagulated by heat or acidity.

Exam 2: Chemistry Comes Alive

A chemical bond never occurs between components of a mixture. Discuss this.

What is the major difference between polar and nonpolar covalent bonds?

Figure 2.1Using Figure 2.1, match the following: -Nucleotide

The fact that no chemical bonding occurs between the components of a mixture is the chief difference between mixtures and compounds.

The lower the pH, the higher the hydrogen ion concentration.

Choose the answer that best describes fibrous proteins.

The chemical symbol O=O means _ .

Figure 2.1Using Figure 2.1, match the following: -have a bitter taste, feel slippery, and are proton acceptors.

Isotopes differ from each other only in the number of electrons the atom contains.

Choose the answer that best describes HCO3- .

31) You notice that you cannot read your book through a test tube of patient fluid held against the print, making it so blurred as to be unreadable. There is no precipitant in the bottom of the beaker, though it has been sitting for several days in a rack. What type of liquid is this?

What does the formula C6H12O6 mean?

What happens in redox reactions?

How can DNA be used to "fingerprint" a suspect in a crime?

Which of the following elements is necessary for proper conduction of nervous impulses?

A dipeptide can be broken into two amino acids by dehydration synthesis.

The genetic information is coded in DNA by the .

A chemical reaction in which bonds are broken is usually associated with .

Hydrogen bonds are more like a type of weak than correct bonds.

Which of the following is not true of proteins?

The Human Body: an Orientation

Cells: the Living Units

Tissue: the Living Fabric

The Integumentary System

Bones and Skeletal Tissues

The Skeleton

Joints

Muscles and Muscle Tissue

The Muscular System

Fundamentals of the Nervous System and Nervous Tissue

The Central Nervous System

The Peripheral Nervous System and Reflex Activity

The Autonomic Nervous System

The Special Senses

The Endocrine System

Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels

The Lymphatic System and Lymphoid Organs and Tissues

The Immune System: Innate and Adaptive Body Defensives

The Respiratory System

The Digestive System

Nutrition, Metabolism, and Body Temperature Regulation

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive System

Pregnancy and Human Development

Heredity

Filters

Choose the answer that best describes HCO₃- .