Question 1

Why does a protein not function after it has been denatured?

Accepted Answer

A) The normal bonding between the R groups has been disturbed and the protein loses its normal shape. 
B) The normal bonding between the beta sheets has been disturbed and the protein loses its normal shape. 
C) The normal bonding between the hydrogens in the alpha helix has been disturbed and the protein loses its normal shape. 
D) The R groups form additional bonds causing the structure to become more compact. 
E) The normal peptide bonds are ruptured and the individual amino acids are not held together any morE. 
A) The normal bonding between the R groups has been disturbed and the protein loses its normal shape. 
B) The normal bonding between the beta sheets has been disturbed and the protein loses its normal shape. 
C) The normal bonding between the hydrogens in the alpha helix has been disturbed and the protein loses its normal shape. 
D) The R groups form additional bonds causing the structure to become more compact. 
E) The normal peptide bonds are ruptured and the individual amino acids are not held together any morE.

Question 2

A species has 29% of its DNA composed of the nucleotide containing guanine (G).What percent does the nitrogen base thymine (T)equal?

Accepted Answer

A) 58% 
B) 42% 
C) 21% 
D) 67% 
E) 29% 
A) 58% 
B) 42% 
C) 21% 
D) 67% 
E) 29%

Question 3

Which of the following foods would be a good source of fiber?

Accepted Answer

A) All of these are good sources of fiber. 
B) peaches 
C) whole wheat bread 
D) peanuts 
E) bran cereal 
A) All of these are good sources of fiber. 
B) peaches 
C) whole wheat bread 
D) peanuts 
E) bran cereal

Question 4

How many elements occur naturally?

Accepted Answer

A) 112 
B) 92 
C) 64 
D) 32 
E) 6 
A) 112 
B) 92 
C) 64 
D) 32 
E) 6

Question 5

Ca3(PO4)2 represents a/an

Accepted Answer

A) element. 
B) mixture. 
C) compound. 
D) isotope. 
E) atom. 
A) element. 
B) mixture. 
C) compound. 
D) isotope. 
E) atom.

Question 6

An alpha helix or a beta sheet are examples of what level of protein structure?

Accepted Answer

A) secondary 
B) primary 
C) tertiary 
D) quaternary 
E) octagon 
A) secondary 
B) primary 
C) tertiary 
D) quaternary 
E) octagon

Question 7

Which polysaccharide is consumed as a source of fiber?

Accepted Answer

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

Question 8

After lunch our digestive system will use the process of hydrolysis to break the food down into smaller subunits.

Accepted Answer

A) True 
 B)False

Question 9

The presence of a buffer in our blood is an example of homeostasis.

Accepted Answer

A) True 
 B)False

Question 10

CaCl2 is a salt that forms as the result of what type of bond?

Accepted Answer

A) covalent 
B) hydrogen 
C) polar 
D) non-polar 
E) ionic 
A) covalent 
B) hydrogen 
C) polar 
D) non-polar 
E) ionic

Question 11

A combination of two or more atoms of the same type is called

Accepted Answer

A) an atomic unit. 
B) a molecule. 
C) a compound. 
D) an isotope. 
E) an ion. 
A) an atomic unit. 
B) a molecule. 
C) a compound. 
D) an isotope. 
E) an ion.

Question 12

Describe the structure and function of the DNA molecule.

Accepted Answer

DNA is composed of a phosphate group,nit

Question 13

All amino acids are alike in that their R groups are polar.

Accepted Answer

A) True 
 B)False

Question 14

ATP carries energy in the form of high-energy

Accepted Answer

A) carbohydrate bonds. 
B) peptide bonds. 
C) lipid bonds. 
D) phosphate bonds. 
E) hydrogen bonds 
A) carbohydrate bonds. 
B) peptide bonds. 
C) lipid bonds. 
D) phosphate bonds. 
E) hydrogen bonds

Question 15

The monomer unit of a protein is

Accepted Answer

A) fatty acids. 
B) amino acids. 
C) monosaccharides. 
D) polysaccharides. 
E) nucleic acids. 
A) fatty acids. 
B) amino acids. 
C) monosaccharides. 
D) polysaccharides. 
E) nucleic acids.

Question 16

What passes through the digestive tract as fiber or roughage?

Accepted Answer

A) Maltose 
B) Glucose 
C) Glycogen 
D) Starch 
E) Cellulose 
A) Maltose 
B) Glucose 
C) Glycogen 
D) Starch 
E) Cellulose

Question 17

Radiation can produce both positive and negative effects for humans.

Accepted Answer

A) True 
 B)False

Question 18

The atomic number of an atom is determined by the number of

Accepted Answer

A) protons. 
B) neutrons. 
C) electrons. 
D) protons and neutrons. 
E) protons and electrons. 
A) protons. 
B) neutrons. 
C) electrons. 
D) protons and neutrons. 
E) protons and electrons.

Question 19

Which of the following elements will have more than 2 electrons and have a full outer orbital?

Accepted Answer

A) He 
B) Ne 
C) C 
D) N 
E) O 
A) He 
B) Ne 
C) C 
D) N 
E) O

Question 20

In biology,calling something organic means that it was grown without the use of any type of herbicide.

Accepted Answer

A) True 
 B)False

Exam 2: Chemistry of Life

Why does a protein not function after it has been denatured?

A species has 29% of its DNA composed of the nucleotide containing guanine (G).What percent does the nitrogen base thymine (T)equal?

Which of the following foods would be a good source of fiber?

How many elements occur naturally?

Ca3(PO4)2 represents a/an

An alpha helix or a beta sheet are examples of what level of protein structure?

Which polysaccharide is consumed as a source of fiber?

After lunch our digestive system will use the process of hydrolysis to break the food down into smaller subunits.

The presence of a buffer in our blood is an example of homeostasis.

CaCl2 is a salt that forms as the result of what type of bond?

A combination of two or more atoms of the same type is called

Describe the structure and function of the DNA molecule.

All amino acids are alike in that their R groups are polar.

ATP carries energy in the form of high-energy

The monomer unit of a protein is

What passes through the digestive tract as fiber or roughage?

Radiation can produce both positive and negative effects for humans.

The atomic number of an atom is determined by the number of

Which of the following elements will have more than 2 electrons and have a full outer orbital?

In biology,calling something organic means that it was grown without the use of any type of herbicide.

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

Filters

Ca₃(PO₄)₂ represents a/an

CaCl₂ is a salt that forms as the result of what type of bond?