Question 1

A solution with a pH of 7.4 ____.

Accepted Answer

A) is considered an acid 
B) has more H+ than OH- 
C) has equal numbers of H+ and OH- 
D) has a pH similar to ammonia 
E) is similar in acidity to normal body fluids 
A) is considered an acid 
B) has more H+ than OH- 
C) has equal numbers of H+ and OH- 
D) has a pH similar to ammonia 
E) is similar in acidity to normal body fluids

Question 2

Which protein binds and releases oxygen molecules?

Accepted Answer

A) collagen 
B) insulin 
C) keratin 
D) hemoglobin 
E) enzymes 
A) collagen 
B) insulin 
C) keratin 
D) hemoglobin 
E) enzymes

Question 3

Match between columns
                        Premises: resists pH changes by binding and releasing HS1U1P1+S1S1P0
property of phospholipid tails
glucose is an example
determines special properties of molecules
binds HS1U1P1+S1S1P0
formed when electrons are transferred between atoms
releases ions other than HS1U1P1+S1S1P0 and OHS1U1P1-S1S1P0
does not contain both C and H
donates HS1U1P1+S1S1P0

Accepted Answer

The Answer of acid and base and ion and salt is...

Question 4

An atom carries no charge because it has as many electrons as ____.

Accepted Answer

A) protons 
B) neutrons 
C) orbitals 
D) neutrinos 
E) shells 
A) protons 
B) neutrons 
C) orbitals 
D) neutrinos 
E) shells

Question 5

If a chlorine atoms has 7 electrons in its outer energy level, which of the following is true about chlorine?

Accepted Answer

A) It is stable as it is and will not react with other atoms. 
B) It will lose an electron during a chemical reaction. 
C) It has an electron structure similar to sodium atoms. 
D) It will form a covalent bond with sodium. 
E) When forming ionic bonds.it will become a negatively charged ion 
A) It is stable as it is and will not react with other atoms. 
B) It will lose an electron during a chemical reaction. 
C) It has an electron structure similar to sodium atoms. 
D) It will form a covalent bond with sodium. 
E) When forming ionic bonds.it will become a negatively charged ion

Question 6

Which nucleotide contains the sugar ribose?

Accepted Answer

A) DNA 
B) ATP 
C) RNA 
D) cAMP 
E) UBP 
A) DNA 
B) ATP 
C) RNA 
D) cAMP 
E) UBP

Question 7

A system that compensates for pH fluctuations by donating or accepting H+ is known as a(n)____.

Accepted Answer

A) acid 
B) base 
C) salt 
D) buffer 
E) antioxidant 
A) acid 
B) base 
C) salt 
D) buffer 
E) antioxidant

Question 8

How do hydrophilic molecules interact with water?

Accepted Answer

A) They are attracted to water. 
B) They are absorbed by water. 
C) They are repelled by water. 
D) They absorb heat from water. 
E) They transfer heat to water. 
A) They are attracted to water. 
B) They are absorbed by water. 
C) They are repelled by water. 
D) They absorb heat from water. 
E) They transfer heat to water.

Question 9

Which statement is true of water?

Accepted Answer

A) Water molecules attract hydrophobic substances. 
B) Water evaporates after absorbing small amounts of heat energy. 
C) Water's hydrogen atom is slightly negative. 
D) Water molecules are polar. 
E) Water's oxygen atom is slightly positive. 
A) Water molecules attract hydrophobic substances. 
B) Water evaporates after absorbing small amounts of heat energy. 
C) Water's hydrogen atom is slightly negative. 
D) Water molecules are polar. 
E) Water's oxygen atom is slightly positive.

Question 10

What level of protein structure is associated with its function?

Accepted Answer

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

Question 11

A lipid is a ____.

Accepted Answer

A) polar hydrocarbon 
B) polar peptide 
C) nonpolar peptide 
D) Ionic polar hydrocarbon 
E) nonpolar hydrocarbon 
A) polar hydrocarbon 
B) polar peptide 
C) nonpolar peptide 
D) Ionic polar hydrocarbon 
E) nonpolar hydrocarbon

Question 12

Which type of bond is responsible for the linking together of two water molecules?

Accepted Answer

A) hydrogen 
B) ionic 
C) polar covalent 
D) nonpolar covalent 
E) isotropic 
A) hydrogen 
B) ionic 
C) polar covalent 
D) nonpolar covalent 
E) isotropic

Question 13

Which type of bond is responsible for the linking together of atoms within a water molecule?

Accepted Answer

A) hydrogen 
B) ionic 
C) polar covalent 
D) nonpolar covalent 
E) isotropic 
A) hydrogen 
B) ionic 
C) polar covalent 
D) nonpolar covalent 
E) isotropic

Question 14

The bonding of two or more atoms creates a(n)____.

Accepted Answer

A) molecule 
B) ion 
C) isotope 
D) mixture 
E) solution 
A) molecule 
B) ion 
C) isotope 
D) mixture 
E) solution

Question 15

A substance that gives up an electron to a free radical is a(n)____.

Accepted Answer

A) oxidizer 
B) antioxidant 
C) antibiotic 
D) antibody 
E) antiviral 
A) oxidizer 
B) antioxidant 
C) antibiotic 
D) antibody 
E) antiviral

Question 16

What is the maximum number of electrons in a shell?

Accepted Answer

A) 0 
B) 2 
C) 6 
D) 8 
E) 12 
A) 0 
B) 2 
C) 6 
D) 8 
E) 12

Question 17

The type of bond that exists between amino acids in a protein is a(n)____ bond.

Accepted Answer

A) peptide 
B) hydrogen 
C) ionic 
D) glycosidic 
E) primary 
A) peptide 
B) hydrogen 
C) ionic 
D) glycosidic 
E) primary

Question 18

Animals store carbohydrates in the form of ____.

Accepted Answer

A) glycogen 
B) starch 
C) glucose 
D) sucrose 
E) lipids 
A) glycogen 
B) starch 
C) glucose 
D) sucrose 
E) lipids

Question 19

A nucleotide is composed of at least one sugar, one phosphate group, and ____.

Accepted Answer

A) one nitrogen-containing base 
B) one amino acid 
C) multiple cholesterol molecules 
D) fatty acid chains 
E) ATP 
A) one nitrogen-containing base 
B) one amino acid 
C) multiple cholesterol molecules 
D) fatty acid chains 
E) ATP

Question 20

Carbohydrates consist of carbon, hydrogen and oxygen in a ratio of ____________________.

Accepted Answer

The answer of Carbohydrates consist of carbon, hydrogen and oxygen...

Exam 2: Chemistry of Life

A solution with a pH of 7.4 ____.

Which protein binds and releases oxygen molecules?

An atom carries no charge because it has as many electrons as ____.

If a chlorine atoms has 7 electrons in its outer energy level, which of the following is true about chlorine?

Which nucleotide contains the sugar ribose?

A system that compensates for pH fluctuations by donating or accepting H+ is known as a(n)____.

How do hydrophilic molecules interact with water?

Which statement is true of water?

What level of protein structure is associated with its function?

A lipid is a ____.

Which type of bond is responsible for the linking together of two water molecules?

Which type of bond is responsible for the linking together of atoms within a water molecule?

The bonding of two or more atoms creates a(n)____.

A substance that gives up an electron to a free radical is a(n)____.

What is the maximum number of electrons in a shell?

The type of bond that exists between amino acids in a protein is a(n)____ bond.

Animals store carbohydrates in the form of ____.

A nucleotide is composed of at least one sugar, one phosphate group, and ____.

Carbohydrates consist of carbon, hydrogen and oxygen in a ratio of ____________________.

Learning About Human Biology

Cells and How They Work

Tissues, Organs, and Organ Systems

The Skeletal System

The Muscular System

Circulation: the Heart and Blood Vessels

Blood

Immunity and Disease

The Respiratory System

Digestion and Nutrition

The Urinary System

The Nervous System

Sensory Systems

The Endocrine System

Reproductive Systems

Development and Aging

Cell Reproduction

Introduction to Genetics

Chromosomes and Human Genetics

DNA Genes and Biotechnology

Genes and Disease: Cancer

Principles of Evolution

Principles of Ecology

Human Impacts on the Biosphere

Filters

A system that compensates for pH fluctuations by donating or accepting H⁺ is known as a(n)____.