Question 1

The primary level of protein structure is composed of amino acids in a linear sequence joined by peptide bonds.

Accepted Answer

A) True 
 B)False  True

Question 2

In an acidic solution

Accepted Answer

A) the number of H+ is less than the number of OH-. 
B) the number of H+ is greater than the number of OH-. 
C) the number of H+ is equal to the number of OH-. 
D) the number of H+ is 3 times less than the number of OH-. 
E) the number of H+ is 10 times less than the number of OH-. 
A) the number of H+ is less than the number of OH-. 
B) the number of H+ is greater than the number of OH-. 
C) the number of H+ is equal to the number of OH-. 
D) the number of H+ is 3 times less than the number of OH-. 
E) the number of H+ is 10 times less than the number of OH-. B

Question 3

Which of the following is not one of the four classes of organic molecules found in cells?

Accepted Answer

A) vitamins 
B) lipids 
C) proteins 
D) carbohydrates 
E) nucleic acids 
A) vitamins 
B) lipids 
C) proteins 
D) carbohydrates 
E) nucleic acids A

Question 4

What substance is used in medicine to produce various images of organs and tissues?

Accepted Answer

A) A mixture 
B) A tracer 
C) An emulsion 
D) A colloid 
E) A sensor 
A) A mixture 
B) A tracer 
C) An emulsion 
D) A colloid 
E) A sensor

Question 5

A fatty acid that contains only single bonds between the carbon atoms is considered

Accepted Answer

A) saturated. 
B) unsaturated. 
C) trans unsaturated. 
D) a cholestrol. 
E) a steroid. 
A) saturated. 
B) unsaturated. 
C) trans unsaturated. 
D) a cholestrol. 
E) a steroid.

Question 6

Which of the following is not present in a nucleotide?

Accepted Answer

A) phosphate 
B) nitrogenous base 
C) 5 ring sugar 
D) an R group 
E) a pentose 
A) phosphate 
B) nitrogenous base 
C) 5 ring sugar 
D) an R group 
E) a pentose

Question 7

A fat contains how many fatty acids?

Accepted Answer

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

Question 8

The sex hormones belong to which category of lipids?

Accepted Answer

A) steroids 
B) fats 
C) oils 
D) triglycerides 
E) phospholipids 
A) steroids 
B) fats 
C) oils 
D) triglycerides 
E) phospholipids

Question 9

Sugars with three to seven carbon atoms are called

Accepted Answer

A) monosaccharides. 
B) disaccharides. 
C) trisaccharides. 
D) polysaccharides. 
E) steroids. 
A) monosaccharides. 
B) disaccharides. 
C) trisaccharides. 
D) polysaccharides. 
E) steroids.

Question 10

Which grouping of elements is found in carbohydrates?

Accepted Answer

A) C - H - O 
B) C - H - P 
C) H - O - Cl 
D) N - S - O 
E) Ca - H - O 
A) C - H - O 
B) C - H - P 
C) H - O - Cl 
D) N - S - O 
E) Ca - H - O

Question 11

Which polysaccharide is branched the most?

Accepted Answer

A) cellulose 
B) starch 
C) glycogen 
D) glucose 
E) fructose 
A) cellulose 
B) starch 
C) glycogen 
D) glucose 
E) fructose

Question 12

Which of the following nitrogenous bases is NOT found in DNA?

Accepted Answer

A) cytosine 
B) thymine 
C) uracil 
D) guanine 
E) adenine 
A) cytosine 
B) thymine 
C) uracil 
D) guanine 
E) adenine

Question 13

Our body is capable of converting starch into glycogen.

Accepted Answer

A) True 
 B)False

Question 14

Fats and oils function better than other biological molecules as energy-storage molecules because of the carbon they contain.

Accepted Answer

A) True 
 B)False

Question 15

The membranes of cells are composed of

Accepted Answer

A) phospholipids. 
B) fats. 
C) oils. 
D) steroids. 
E) triglycerides. 
A) phospholipids. 
B) fats. 
C) oils. 
D) steroids. 
E) triglycerides.

Question 16

Why is He positioned above Ne in the periodic table?

Accepted Answer

A) They both have the same atomic mass. 
B) They both have the same number of electrons in their outermost orbital. 
C) They both have a full outermost orbital. 
D) They both have the same atomic number. 
E) They both have the same number of protons in their nuclei. 
A) They both have the same atomic mass. 
B) They both have the same number of electrons in their outermost orbital. 
C) They both have a full outermost orbital. 
D) They both have the same atomic number. 
E) They both have the same number of protons in their nuclei.

Question 17

The sides of the DNA ladder (backbone)are

Accepted Answer

A) alternating carbons and nitrogens. 
B) the R groups. 
C) the nitrogenous bases. 
D) alternating nitrogens and phosphates. 
E) sugars and phosphates. 
A) alternating carbons and nitrogens. 
B) the R groups. 
C) the nitrogenous bases. 
D) alternating nitrogens and phosphates. 
E) sugars and phosphates.

Question 18

The smallest unit of an element that still retains the chemical and physical properties of that element is called

Accepted Answer

A) an isotope. 
B) a nucleus. 
C) an atom. 
D) a molecular bonD. 
E) a neutrino. 
A) an isotope. 
B) a nucleus. 
C) an atom. 
D) a molecular bonD. 
E) a neutrino.

Question 19

ATP is called the energy currency of the body because it is a type of electricity.

Accepted Answer

A) True 
 B)False

Question 20

Be has an atomic number of 4 and an atomic mass of 9.How many protons does it have?

Accepted Answer

A) 4 
B) 5 
C) 9 
D) 13 
E) 7 
A) 4 
B) 5 
C) 9 
D) 13 
E) 7

Exam 2: Chemistry of Life

The primary level of protein structure is composed of amino acids in a linear sequence joined by peptide bonds.

In an acidic solution

Which of the following is not one of the four classes of organic molecules found in cells?

What substance is used in medicine to produce various images of organs and tissues?

A fatty acid that contains only single bonds between the carbon atoms is considered

Which of the following is not present in a nucleotide?

A fat contains how many fatty acids?

The sex hormones belong to which category of lipids?

Sugars with three to seven carbon atoms are called

Which grouping of elements is found in carbohydrates?

Which polysaccharide is branched the most?

Which of the following nitrogenous bases is NOT found in DNA?

Our body is capable of converting starch into glycogen.

Fats and oils function better than other biological molecules as energy-storage molecules because of the carbon they contain.

The membranes of cells are composed of

Why is He positioned above Ne in the periodic table?

The sides of the DNA ladder (backbone)are

The smallest unit of an element that still retains the chemical and physical properties of that element is called

ATP is called the energy currency of the body because it is a type of electricity.

Be has an atomic number of 4 and an atomic mass of 9.How many protons does it have?

Exploring Life and Science

Cell Structure and Function

Organization and Regulation of Body Systems

Cardiovascular System: Heart and Blood Vessels

Cardiovascular System: Blood

The Lymphatic and Immune Systems

Biology of Infectious Diseases

Digestive System and Nutrition

Respiratory System

Urinary System

Skeletal System

Muscular System

Nervous System

Senses

Endocrine System

Reproductive System

Development and Aging

Patterns of Chromosome Inheritance

Cancer

Patterns of Genetic Inheritance

DNA Biology and Technology

Human Evolution

Global Ecology and Human Interferences

Human Population,global Resources,and Conservation

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