Question 1

All of the following are lipids commonly found in the human EXCEPT

Accepted Answer

A) triglyceride 
B) cholesterol 
C) estradiol 
D) albumin 
E) phospholipid 
A) triglyceride 
B) cholesterol 
C) estradiol 
D) albumin 
E) phospholipid D

Question 2

Name the different types of chemical bonds and briefly describe how they are formed.

Accepted Answer

Covalent bonds are formed by the sharing of one, two, or three pairs of electrons by two atoms. Ionic bonds are formed when an actual transfer of electrons occurs between atoms thus forming oppositely charged ions that are attracted to one another. Hydrogen bonds are the weakest of the chemical bonds and are formed by attraction between a hydrogen atom with partial positive charge and another atom with partial negative charge.

Question 3

Carbohydrates are composed of carbon, hydrogen, and oxygen atoms usually in a ratio of 1:2:1.

Accepted Answer

A) True 
 B)False  True

Question 4

The four nitrogenous bases found in DNA are adenine, thymine, cytosine and uracil.

Accepted Answer

A) True 
 B)False

Question 5

Explain the difference between acids, bases, and salts.

Accepted Answer

Acids are compounds, which dissociate in

Question 6

Cholesterol is used to produce some sex hormones.

Accepted Answer

A) True 
 B)False

Question 7

The chemical symbol for iron is

Accepted Answer

A) K 
B) Na 
C) I 
D) Fe 
E) Mg 
A) K 
B) Na 
C) I 
D) Fe 
E) Mg

Question 8

Which of the following best describes how energy is released from ATP stored in cells?

Accepted Answer

A) The terminal phosphate is hydrolyzed. 
B) All three phosphates are sequentially removed by dehydration reactions. 
C) The adenosine is reduced to adenine. 
D) The three phosphates are sequentially donated to glucose. 
E) The three phosphates are used to make new bonds between the nucleotides in DNA. 
A) The terminal phosphate is hydrolyzed. 
B) All three phosphates are sequentially removed by dehydration reactions. 
C) The adenosine is reduced to adenine. 
D) The three phosphates are sequentially donated to glucose. 
E) The three phosphates are used to make new bonds between the nucleotides in DNA.

Question 9

The type of covalent bond that joins amino acids together to form more complex molecules like proteins is called a/an

Accepted Answer

A) peptide bond 
B) ionic bond 
C) hydrogen bond 
D) nitrogen bond 
E) glycosidic bond 
A) peptide bond 
B) ionic bond 
C) hydrogen bond 
D) nitrogen bond 
E) glycosidic bond

Question 10

Which of the following structures is labeled A in the Figure shown?

Accepted Answer

A) active site 
B) substrate 
C) product 
D) enzyme 
E) cofactor 
A) active site 
B) substrate 
C) product 
D) enzyme 
E) cofactor

Question 11

An atom that has given up or gained an electron is referred to as a/an

Accepted Answer

A) molecule 
B) neutron 
C) ion 
D) compound 
E) isotope 
A) molecule 
B) neutron 
C) ion 
D) compound 
E) isotope

Question 12

What element is the atom that is labeled B in the figure?

Accepted Answer

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

Question 13

Which of the following structural components are found in both phospholipids and triglycerides?

Accepted Answer

A) glycerol backbone 
B) cholesterol ring 
C) polar phosphate-containing head group 
D) modified amino acid backbone 
E) hydrophobic amino acid sidechains 
A) glycerol backbone 
B) cholesterol ring 
C) polar phosphate-containing head group 
D) modified amino acid backbone 
E) hydrophobic amino acid sidechains

Question 14

All of the following are enzymes EXCEPT

Accepted Answer

A) lactose 
B) peptidase 
C) oxidase 
D) aminopeptidase 
E) amylase 
A) lactose 
B) peptidase 
C) oxidase 
D) aminopeptidase 
E) amylase

Question 15

The number of protons in the nucleus of an atom is indicated by the

Accepted Answer

A) atomic mass 
B) atomic number 
C) molecular formula 
D) atomic weight 
E) valence number 
A) atomic mass 
B) atomic number 
C) molecular formula 
D) atomic weight 
E) valence number

Question 16

DNA and RNA are large polymers composed of repeating building blocks called

Accepted Answer

A) nucleotides 
B) amino acids 
C) monosaccharides 
D) fatty acids 
E) phospholipids 
A) nucleotides 
B) amino acids 
C) monosaccharides 
D) fatty acids 
E) phospholipids

Question 17

In the human body, glycogen is commonly stored in the cells of the

Accepted Answer

A) brain 
B) liver 
C) smooth muscles 
D) brain and liver 
E) liver and skeletal muscles 
A) brain 
B) liver 
C) smooth muscles 
D) brain and liver 
E) liver and skeletal muscles

Question 18

A type of weak chemical bond that forms between a hydrogen atom with partial positive charge and another atom with partial negative charge is called a/an

Accepted Answer

A) hydrogen bond 
B) ionic bond 
C) single covalent bond 
D) double covalent bond 
E) none of the choices is correct 
A) hydrogen bond 
B) ionic bond 
C) single covalent bond 
D) double covalent bond 
E) none of the choices is correct

Question 19

What role does sucrose and water play in the enzyme-catalyzed reaction shown?

Accepted Answer

A) enzymes 
B) substrates 
C) products 
D) cofactors 
E) vitamins 
A) enzymes 
B) substrates 
C) products 
D) cofactors 
E) vitamins

Question 20

When many monosaccharides are joined together through dehydration synthesis, a/an _____ is formed.

Accepted Answer

The answer of When many monosaccharides are joined together through...

Exam 2: Introductory Chemistry

All of the following are lipids commonly found in the human EXCEPT

Name the different types of chemical bonds and briefly describe how they are formed.

Carbohydrates are composed of carbon, hydrogen, and oxygen atoms usually in a ratio of 1:2:1.

The four nitrogenous bases found in DNA are adenine, thymine, cytosine and uracil.

Explain the difference between acids, bases, and salts.

Cholesterol is used to produce some sex hormones.

The chemical symbol for iron is

Which of the following best describes how energy is released from ATP stored in cells?

The type of covalent bond that joins amino acids together to form more complex molecules like proteins is called a/an

Which of the following structures is labeled A in the Figure shown?

An atom that has given up or gained an electron is referred to as a/an

What element is the atom that is labeled B in the figure?

Which of the following structural components are found in both phospholipids and triglycerides?

All of the following are enzymes EXCEPT

The number of protons in the nucleus of an atom is indicated by the

DNA and RNA are large polymers composed of repeating building blocks called

In the human body, glycogen is commonly stored in the cells of the

A type of weak chemical bond that forms between a hydrogen atom with partial positive charge and another atom with partial negative charge is called a/an

What role does sucrose and water play in the enzyme-catalyzed reaction shown?

When many monosaccharides are joined together through dehydration synthesis, a/an _____ is formed.

Organization of the Human Body

Cells

Tissues

The Integumentary System

The Skeletal System

Joints

The Muscular System

Nervous Tissue

Central Nervous System, Spinal Nerves, and Cranial Nerves

Autonomic Nervous System

Somatic Senses and Special Sense

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Nutrition and Metabolism

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive Systems

Development and Inheritance

Filters