Question 1

Polar molecules are composed of covalently bonded

Accepted Answer

A) identical atoms. 
B) carbon atoms. 
C) ions. 
D) atoms of different electronegativity. 
E) atoms of identical electronegativity. 
A) identical atoms. 
B) carbon atoms. 
C) ions. 
D) atoms of different electronegativity. 
E) atoms of identical electronegativity. D

Question 2

Cations are

Accepted Answer

A) charged subatomic particles. 
B) atoms that have gained electrons. 
C) atoms that have gained neutrons. 
D) capable of forming ionic bonds with anions. 
E) atoms without protons. 
A) charged subatomic particles. 
B) atoms that have gained electrons. 
C) atoms that have gained neutrons. 
D) capable of forming ionic bonds with anions. 
E) atoms without protons. D

Question 3

Nucleic acids have primary,secondary,tertiary,and quaternary levels of organization.

Accepted Answer

A) True 
 B)False  False

Question 4

If solution A has a lower pH compared to solution B,then solution A is more acidic than solution B.

Accepted Answer

A) True 
 B)False

Question 5

A fat is called _____ if all carbons of the fatty acid chain are single-bonded to 2 other carbons and 2 hydrogens.

Accepted Answer

A) unsaturated 
B) polyunsaturated 
C) monounsaturated 
D) saturated 
A) unsaturated 
B) polyunsaturated 
C) monounsaturated 
D) saturated

Question 6

Atoms that gain or lose electrons become charged particles called

Accepted Answer

A) cations. 
B) anions. 
C) ions. 
D) isotopes. 
A) cations. 
B) anions. 
C) ions. 
D) isotopes.

Question 7

An example of an amphipathic molecule found in living cells is

Accepted Answer

A) glucose. 
B) phospholipid. 
C) protein. 
D) nucleic acids. 
E) ATP. 
A) glucose. 
B) phospholipid. 
C) protein. 
D) nucleic acids. 
E) ATP.

Question 8

The only part of an amino acid that differs from other amino acids is its R group.

Accepted Answer

A) True 
 B)False

Question 9

During protein synthesis,____ RNA is made to be a copy of a gene from the DNA that will be translated into protein.

Accepted Answer

A) transfer 
B) messenger 
C) ribosomal 
D) small subunit 
A) transfer 
B) messenger 
C) ribosomal 
D) small subunit

Question 10

Anything that occupies space and has mass is called

Accepted Answer

A) atomic. 
B) living. 
C) matter. 
D) energy. 
E) space. 
A) atomic. 
B) living. 
C) matter. 
D) energy. 
E) space.

Question 11

Two or more atoms bonded together are called a/an

Accepted Answer

A) ion. 
B) isotope. 
C) element. 
D) electrolyte. 
E) molecule. 
A) ion. 
B) isotope. 
C) element. 
D) electrolyte. 
E) molecule.

Question 12

Electrons that participate in chemical bonding are typically located closest to the nucleus.

Accepted Answer

A) True 
 B)False

Question 13

The alpha ($\alpha$)helix is a type of _____ protein structure.

Accepted Answer

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

Question 14

Organic chemicals always have a basic framework of the element _____ bonded to other atoms.

Accepted Answer

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

Question 15

Ionic bonds

Accepted Answer

A) result from sharing electrons. 
B) result from transferring electrons. 
C) result from like charge attraction. 
D) are the weakest chemical bonds. 
E) always involve carbon. 
A) result from sharing electrons. 
B) result from transferring electrons. 
C) result from like charge attraction. 
D) are the weakest chemical bonds. 
E) always involve carbon.

Question 16

Covalent bonds

Accepted Answer

A) result from losing electrons. 
B) are always polar. 
C) are always nonpolar. 
D) result from sharing electrons. 
E) result from gaining electrons. 
A) result from losing electrons. 
B) are always polar. 
C) are always nonpolar. 
D) result from sharing electrons. 
E) result from gaining electrons.

Question 17

Select the statement that most accurately reflects the process of plant material digestion in humans:

Accepted Answer

A) it is a very efficient process the produces very little undigested material in feces. 
B) it is a process that is dependent upon enzyme (cellulase)production by gut microbiota. 
C) it requires the action of enzymes called kinases. 
D) it is linked to the digestion of glycogen. 
A) it is a very efficient process the produces very little undigested material in feces. 
B) it is a process that is dependent upon enzyme (cellulase)production by gut microbiota. 
C) it requires the action of enzymes called kinases. 
D) it is linked to the digestion of glycogen.

Question 18

Which of the following represents a reversible reaction?

Accepted Answer

A) AB $\rarr$ A + B 
B) A + B $\rarr$ AB 
C) AB + XY $\rarr$ AY + XB. 
D) AB + XY $\rarr$ AY + XB 
A) AB $\rarr$ A + B 
B) A + B $\rarr$ AB 
C) AB + XY $\rarr$ AY + XB. 
D) AB + XY $\rarr$ AY + XB

Question 19

An atom has gained an electron.It has been

Accepted Answer

A) oxidized. 
B) reduced. 
C) ionized. 
D) deionized. 
E) neutralized. 
A) oxidized. 
B) reduced. 
C) ionized. 
D) deionized. 
E) neutralized.

Question 20

Characteristics shared by all cells include

Accepted Answer

A) a membrane serving as a cell boundary. 
B) the possession of genetic information. 
C) the presence of cellular fluid. 
D) All of the choices are correct. 
A) a membrane serving as a cell boundary. 
B) the possession of genetic information. 
C) the presence of cellular fluid. 
D) All of the choices are correct.

Exam 2: The Chemistry of Biology

Polar molecules are composed of covalently bonded

Cations are

Nucleic acids have primary,secondary,tertiary,and quaternary levels of organization.

If solution A has a lower pH compared to solution B,then solution A is more acidic than solution B.

A fat is called _____ if all carbons of the fatty acid chain are single-bonded to 2 other carbons and 2 hydrogens.

Atoms that gain or lose electrons become charged particles called

An example of an amphipathic molecule found in living cells is

The only part of an amino acid that differs from other amino acids is its R group.

During protein synthesis,____ RNA is made to be a copy of a gene from the DNA that will be translated into protein.

Anything that occupies space and has mass is called

Two or more atoms bonded together are called a/an

Electrons that participate in chemical bonding are typically located closest to the nucleus.

The alpha ( α\alphaα )helix is a type of _____ protein structure.

Organic chemicals always have a basic framework of the element _____ bonded to other atoms.

Ionic bonds

Covalent bonds

Select the statement that most accurately reflects the process of plant material digestion in humans:

Which of the following represents a reversible reaction?

An atom has gained an electron.It has been

Characteristics shared by all cells include

The Main Themes of Microbiology

Tools of the Laboratory: Methods for the Culturing of Microscopic Analysis of Microorganisms

Prokaryotic Profiles: The Bacteria and Archaea

Eukaryotic Cells and Microorganisms

An Introduction to the Viruses

Microbial Nutrition, Ecology, and Growth

Microbial Metabolism: the Chemical Crossroads of Life

Microbial Genetics

Genetic Engineering and Recombinant Dna

Physical and Chemical Control of Microbes

Drugs, Microbes, host-The Elements of Chemotherapy

Microbe-Human Interactions: Infection and Disease

Host Defenses I: Overview and Nonspecific Defenses

Host Defenses II: Specific Immunity and Immunization

Disorders in Immunity

Diagnosing Infections

Infectious Diseases Affecting the Skin and Eyes

Infectious Diseases Affecting the Nervous System

Infectious Diseases Affecting the Cardiovascular and Lymphatic Systems

Infectious Diseases Affecting the Respiratory System

Infectious Diseases Affecting the Gastrointestinal Tract

Infectious Diseases Affecting the Genitourinary System

Microbes and the Environment

Applied Microbiology and Food and Water Safety

Filters

The alpha ( $\alpha$ )helix is a type of _____ protein structure.