Question 1

The element uranium has a mass number of 238 and contains 92 protons. How many electrons does an atom of uranium have?

Accepted Answer

The answer of The element uranium has a mass number...

Question 2

Denaturation is

Accepted Answer

A)  a combination of atoms held together by chemical bonds. 
B)  a positively charged ion. 
C)  a negatively charged ion. 
D)  a substance that conducts electricity when placed in solution. 
E)  a change in the three-dimensional structure of a protein. 
A)  a combination of atoms held together by chemical bonds. 
B)  a positively charged ion. 
C)  a negatively charged ion. 
D)  a substance that conducts electricity when placed in solution. 
E)  a change in the three-dimensional structure of a protein.

Question 3

Cobalt-60 is used for radiation treatments of cancer. How many neutrons does an atom of Co-60 have?

Accepted Answer

The answer of Cobalt-60 is used for radiation treatments of...

Question 4

Heat energy is

Accepted Answer

A)  the form of energy that actually does work. 
B)  movement of ions or electrons. 
C)  energy that flows between objects with different temperatures. 
D)  stored energy that could do work but is not doing so. 
E)  energy that moves in waves. 
A)  the form of energy that actually does work. 
B)  movement of ions or electrons. 
C)  energy that flows between objects with different temperatures. 
D)  stored energy that could do work but is not doing so. 
E)  energy that moves in waves.

Question 5

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male. What kind of molecule is found at "E"?

Accepted Answer

A)  hydrogen bond 
B)  water molecule 
C)  oxygen atom 
D)  hydrogen atom 
E)  polar covalent bond 
A)  hydrogen bond 
B)  water molecule 
C)  oxygen atom 
D)  hydrogen atom 
E)  polar covalent bond

Question 6

Cellulose is the

Accepted Answer

A)  storage carbohydrate in animals. 
B)  storage carbohydrate in plants. 
C)  nondigestible plant polysaccharide. 
D)  major nutrient for most body cells. 
E)  sugar found in RNA. 
A)  storage carbohydrate in animals. 
B)  storage carbohydrate in plants. 
C)  nondigestible plant polysaccharide. 
D)  major nutrient for most body cells. 
E)  sugar found in RNA.

Question 7

An electrolyte is

Accepted Answer

A)  a combination of atoms held together by chemical bonds. 
B)  a positively charged ion. 
C)  a negatively charged ion. 
D)  a substance that conducts electricity when placed in solution. 
E)  the alteration in the three-dimensional structure of a protein. 
A)  a combination of atoms held together by chemical bonds. 
B)  a positively charged ion. 
C)  a negatively charged ion. 
D)  a substance that conducts electricity when placed in solution. 
E)  the alteration in the three-dimensional structure of a protein.

Question 8

Cobalt-60 is used for radiation treatments of cancer. What is the mass number of Co-60?

Accepted Answer

The answer of Cobalt-60 is used for radiation treatments of...

Question 9

Which of the following organic groups does DNA belong to?

Accepted Answer

A)  carbohydrate 
B)  protein 
C)  lipid 
D)  nucleic acid 
E)  vitamin 
A)  carbohydrate 
B)  protein 
C)  lipid 
D)  nucleic acid 
E)  vitamin

Question 10

Starch is the

Accepted Answer

A)  storage carbohydrate in animals. 
B)  storage carbohydrate in plants. 
C)  nondigestible plant polysaccharide. 
D)  major nutrient for most body cells. 
E)  sugar found in RNA. 
A)  storage carbohydrate in animals. 
B)  storage carbohydrate in plants. 
C)  nondigestible plant polysaccharide. 
D)  major nutrient for most body cells. 
E)  sugar found in RNA.

Question 11

Which of the following is NOT a function of carbohydrates in the body?

Accepted Answer

A)  structural component of DNA 
B)  protection 
C)  bulk in feces 
D)  energy 
E)  structural component of RNA 
A)  structural component of DNA 
B)  protection 
C)  bulk in feces 
D)  energy 
E)  structural component of RNA

Question 12

Which of the following organic groups does a steroid belong to?

Accepted Answer

A)  carbohydrate 
B)  protein 
C)  lipid 
D)  nucleic acid 
E)  vitamin 
A)  carbohydrate 
B)  protein 
C)  lipid 
D)  nucleic acid 
E)  vitamin

Question 13

Which of the following is a source of nitrogen for the body?

Accepted Answer

A)  carbohydrates 
B)  water 
C)  proteins 
D)  glucose 
E)  lipids 
A)  carbohydrates 
B)  water 
C)  proteins 
D)  glucose 
E)  lipids

Question 14

A molecule is

Accepted Answer

A)  a combination of atoms held together by chemical bonds. 
B)  a positively charged ion. 
C)  a negatively charged ion. 
D)  a substance that conducts electricity when placed in solution. 
E)  an alteration in the three-dimensional structure of a protein. 
A)  a combination of atoms held together by chemical bonds. 
B)  a positively charged ion. 
C)  a negatively charged ion. 
D)  a substance that conducts electricity when placed in solution. 
E)  an alteration in the three-dimensional structure of a protein.

Question 15

The model that helps explain how an enzyme works is the

Accepted Answer

A)  activation model. 
B)  lock-and-key model. 
C)  three-dimensional model. 
D)  denaturation model. 
A)  activation model. 
B)  lock-and-key model. 
C)  three-dimensional model. 
D)  denaturation model.

Question 16

A solution that contains one osmole of solute in one kilogram (kg) of water is called a

Accepted Answer

A)  1% solution. 
B)  1 molar solution. 
C)  10% solution. 
D)  1 osmolal solution. 
E)  None of these choices are correct. 
A)  1% solution. 
B)  1 molar solution. 
C)  10% solution. 
D)  1 osmolal solution. 
E)  None of these choices are correct.

Question 17

The molecule used most frequently by cells as a fuel belongs to which of the following groups?

Accepted Answer

A)  prostaglandins 
B)  carbohydrates 
C)  nucleic acids 
D)  steroids 
E)  phospholipids 
A)  prostaglandins 
B)  carbohydrates 
C)  nucleic acids 
D)  steroids 
E)  phospholipids

Question 18

Covalent bonds form when

Accepted Answer

A)  atomic nuclei fuse. 
B)  molecules become ionized. 
C)  neutrons are transferred from one atom to another. 
D)  protons are lost from atoms. 
E)  electrons are shared between two atoms. 
A)  atomic nuclei fuse. 
B)  molecules become ionized. 
C)  neutrons are transferred from one atom to another. 
D)  protons are lost from atoms. 
E)  electrons are shared between two atoms.

Question 19

A neutral atom will become a cation if it

Accepted Answer

A)  gains electrons. 
B)  gains protons. 
C)  loses electrons. 
D)  loses protons. 
E)  gains neutrons. 
A)  gains electrons. 
B)  gains protons. 
C)  loses electrons. 
D)  loses protons. 
E)  gains neutrons.

Question 20

The energy stored in ATP is a form of ________ energy.

Accepted Answer

A)  mechanical 
B)  chemical 
C)  kinetic 
D)  heat 
E)  electrical 
A)  mechanical 
B)  chemical 
C)  kinetic 
D)  heat 
E)  electrical

Exam 2: The Chemical Basis of Life

The element uranium has a mass number of 238 and contains 92 protons. How many electrons does an atom of uranium have?

Denaturation is

Cobalt-60 is used for radiation treatments of cancer. How many neutrons does an atom of Co-60 have?

Heat energy is

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male. What kind of molecule is found at "E"?

Cellulose is the

An electrolyte is

Cobalt-60 is used for radiation treatments of cancer. What is the mass number of Co-60?

Which of the following organic groups does DNA belong to?

Starch is the

Which of the following is NOT a function of carbohydrates in the body?

Which of the following organic groups does a steroid belong to?

Which of the following is a source of nitrogen for the body?

A molecule is

The model that helps explain how an enzyme works is the

A solution that contains one osmole of solute in one kilogram (kg) of water is called a

The molecule used most frequently by cells as a fuel belongs to which of the following groups?

Covalent bonds form when

A neutral atom will become a cation if it

The energy stored in ATP is a form of ________ energy.

The Human Organism

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolytes, and Acidbase Balance

Reproductive System

Development, Growth, Aging, and Genetics

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