Question 1

In the compound H2CO3, what do the numbers 2 and 3 represent?

Accepted Answer

The 2 indicates that there are

Question 2

The molecule directly provides energy for cellular work.

Accepted Answer

The answer of The molecule directly provides energy for cellular...

Question 3

The acidity of a solution reflects the free hydrogen ions in the solution

Accepted Answer

A) True 
 B)False

Question 4

The pH of body fluids must remain fairly constant for the body to maintain homeostasis.

Accepted Answer

A) True 
 B)False

Question 5

The numbers listed represent the number of electrons in the first, second, and third energy levels, respectively. On this basis, which of the following is an unstable or reactive atom?

Accepted Answer

A)  2, 8 
B)  2 
C)  2, 8, 1 
D)  2, 8, 8 
A)  2, 8 
B)  2 
C)  2, 8, 1 
D)  2, 8, 8

Question 6

What advantages does ATP have in being the energy currency molecule?

Accepted Answer

Its energy is easy to capture and store;

Question 7

Why is it possible for us to drink a solution that contains a mixture of equal concentration of a strong acid and a strong base, either of which, separately, would be very caustic?

Accepted Answer

When an acid and base of equal

Question 8

In a DNA molecule, the phosphate serves .

Accepted Answer

A)  to bind the sugars to their bases 
B)  to hold the molecular backbone together 
C)  as nucleotides 
D)  as a code 
A)  to bind the sugars to their bases 
B)  to hold the molecular backbone together 
C)  as nucleotides 
D)  as a code

Question 9

Amino acids joining together to make a peptide is a good example of a(n) reaction.

Accepted Answer

A)  decomposition 
B)  reversible 
C)  synthesis 
D)  exchange 
A)  decomposition 
B)  reversible 
C)  synthesis 
D)  exchange

Question 10

Figure 2.1Using Figure 2.1, match the following:
-Weak acids and bases make good _ .

Accepted Answer

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

Question 11

A 23- year- old male was riding his road bike in 100- degree heat, when he suddenly became nauseated and weak. He called 911 from his cell phone. When the ambulance came, the paramedics started intravenous therapy for severe dehydration. Explain the critical role of water to maintain homeostasis.

Accepted Answer

Water is the most abundant and important

Question 12

Current information suggests that omega- 3 fatty acids decrease the risk of heart disease.

Accepted Answer

A) True 
 B)False

Question 13

Glucose is an example of a monosaccharide.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following would be regarded as an organic molecule?

Accepted Answer

A)  CH4 
B)  NaOH 
C)  NaCl 
D)  H2O 
A)  CH4 
B)  NaOH 
C)  NaCl 
D)  H2O

Question 15

Lipids are a poor source of stored energy.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is an example of a suspension?

Accepted Answer

A)  salt water 
B)  rubbing alcohol 
C)  blood 
D)  cytoplasm 
A)  salt water 
B)  rubbing alcohol 
C)  blood 
D)  cytoplasm

Question 17

An atom with three electrons would have a valence of _.

Accepted Answer

The answer of An atom with three electrons would have...

Question 18

When a set of electrodes connected to a light bulb is placed in a solution of dextrose and a current is applied, the light bulb does not light up. When the same unit is placed in HCl, it does. Why?

Accepted Answer

HCl ionizes to form current- c

Question 19

Which of the following statements is false?

Accepted Answer

A)  When the hydrogen ion concentration decreases, the hydroxyl ion concentration also decreases. 
B)  The pH of blood is slightly basic. 
C)  When acids and bases are mixed, they react with each other to form water and a salt. 
D)  The more hydrogen ions in a solution, the more acidic the solution. 
A)  When the hydrogen ion concentration decreases, the hydroxyl ion concentration also decreases. 
B)  The pH of blood is slightly basic. 
C)  When acids and bases are mixed, they react with each other to form water and a salt. 
D)  The more hydrogen ions in a solution, the more acidic the solution.

Question 20

Figure 2.2Using Figure 2.2, match the following:
-Thymine

Accepted Answer

The answer of   Figure 2.2Using Figure 2.2, match...

Exam 2: Chemistry Comes Alive

In the compound H2CO3, what do the numbers 2 and 3 represent?

The molecule directly provides energy for cellular work.

The acidity of a solution reflects the free hydrogen ions in the solution

The pH of body fluids must remain fairly constant for the body to maintain homeostasis.

The numbers listed represent the number of electrons in the first, second, and third energy levels, respectively. On this basis, which of the following is an unstable or reactive atom?

What advantages does ATP have in being the energy currency molecule?

Why is it possible for us to drink a solution that contains a mixture of equal concentration of a strong acid and a strong base, either of which, separately, would be very caustic?

In a DNA molecule, the phosphate serves .

Amino acids joining together to make a peptide is a good example of a(n) reaction.

Figure 2.1Using Figure 2.1, match the following: -Weak acids and bases make good _ .

A 23- year- old male was riding his road bike in 100- degree heat, when he suddenly became nauseated and weak. He called 911 from his cell phone. When the ambulance came, the paramedics started intravenous therapy for severe dehydration. Explain the critical role of water to maintain homeostasis.

Current information suggests that omega- 3 fatty acids decrease the risk of heart disease.

Glucose is an example of a monosaccharide.

Which of the following would be regarded as an organic molecule?

Lipids are a poor source of stored energy.

Which of the following is an example of a suspension?

An atom with three electrons would have a valence of _.

When a set of electrodes connected to a light bulb is placed in a solution of dextrose and a current is applied, the light bulb does not light up. When the same unit is placed in HCl, it does. Why?

Which of the following statements is false?

Figure 2.2Using Figure 2.2, match the following: -Thymine

The Human Body: an Orientation

Cells: the Living Units

Tissue: the Living Fabric

The Integumentary System

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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

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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

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Fluid, Electrolyte, and Acid-Base Balance

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In the compound H₂CO₃, what do the numbers 2 and 3 represent?