Question 1

Which of the following has the lowest OH- concentration?

Accepted Answer

A)  baking soda 
B)  pure water 
C)  coffee 
D)  battery acid 
A)  baking soda 
B)  pure water 
C)  coffee 
D)  battery acid

Question 2

Enzymes are

Accepted Answer

A)  carbohydrates. 
B)  lipids. 
C)  nucleic acids. 
D)  proteins. 
A)  carbohydrates. 
B)  lipids. 
C)  nucleic acids. 
D)  proteins.

Question 3

What is the pH of a neutral solution?

Accepted Answer

A)  1 
B)  5 
C)  7 
D)  9 
A)  1 
B)  5 
C)  7 
D)  9

Question 4

An atom will be least likely to form chemical bonds with other atoms when

Accepted Answer

A)  the number of protons equals the number of electrons. 
B)  the number of protons equals the number of neutrons. 
C)  there is only one electron in the valence shell. 
D)  the valence shell is full of electrons. 
A)  the number of protons equals the number of electrons. 
B)  the number of protons equals the number of neutrons. 
C)  there is only one electron in the valence shell. 
D)  the valence shell is full of electrons.

Question 5

Proteins are composed of monomer subunits called ________ (two words).

Accepted Answer

The answer of Proteins are composed of monomer subunits called...

Question 6

The ________ (two words)defines the outer boundary of all cells, separating the cell's contents from its environment.

Accepted Answer

The answer of The ________ (two words)defines the outer boundary...

Question 7

The reactions of cellular respiration occur in the

Accepted Answer

A)  nucleolus of the nucleus. 
B)  ribosomes of the rough endoplasmic reticulum. 
C)  matrix of the mitochondria. 
D)  hydrophobic core of the outermost cell plasma membrane. 
A)  nucleolus of the nucleus. 
B)  ribosomes of the rough endoplasmic reticulum. 
C)  matrix of the mitochondria. 
D)  hydrophobic core of the outermost cell plasma membrane.

Question 8

Which organelle performs photosynthesis?

Accepted Answer

A)  chloroplast 
B)  Golgi apparatus 
C)  lysosome 
D)  mitochondrion 
A)  chloroplast 
B)  Golgi apparatus 
C)  lysosome 
D)  mitochondrion

Question 9

The purported fossils in meteorite ALH84001 resemble modern prokaryotes called

Accepted Answer

A)  nanobacteria. 
B)  amoebas. 
C)  fungi. 
D)  nucleoids. 
A)  nanobacteria. 
B)  amoebas. 
C)  fungi. 
D)  nucleoids.

Question 10

Cholesterol is classified as a lipid because it contains a large proportion of

Accepted Answer

A)  carbohydrates. 
B)  phosphates. 
C)  glycerol. 
D)  hydrocarbons. 
A)  carbohydrates. 
B)  phosphates. 
C)  glycerol. 
D)  hydrocarbons.

Question 11

What kind of bond holds two water molecules to each other?

Accepted Answer

A)  hydrogen bonds 
B)  ionic bonds 
C)  nonpolar covalent bonds 
D)  polar covalent bonds 
A)  hydrogen bonds 
B)  ionic bonds 
C)  nonpolar covalent bonds 
D)  polar covalent bonds

Question 12

Which of the following pairs of molecules can be held together by a hydrogen bond?

Accepted Answer

A)  one polar molecule and one nonpolar molecule 
B)  two ions 
C)  two nonpolar molecules 
D)  two polar molecules 
A)  one polar molecule and one nonpolar molecule 
B)  two ions 
C)  two nonpolar molecules 
D)  two polar molecules

Question 13

Which organelle is represented by a network of membranes involved in the production of proteins?

Accepted Answer

A)  chloroplast 
B)  endoplasmic reticulum 
C)  lysosome 
D)  nucleus 
A)  chloroplast 
B)  endoplasmic reticulum 
C)  lysosome 
D)  nucleus

Question 14

According to the theory of evolution, which states that all life-forms on Earth arose from a common ancestor, all living organisms

Accepted Answer

A)  share a common organic chemistry. 
B)  have DNA within their nucleus. 
C)  exhibit the same basic cell wall. 
D)  perform the same mode of reproduction. 
A)  share a common organic chemistry. 
B)  have DNA within their nucleus. 
C)  exhibit the same basic cell wall. 
D)  perform the same mode of reproduction.

Question 15

Which of the following is nonpolar?

Accepted Answer

A)  a positive ion 
B)  a negative ion 
C)  a neutral ion 
D)  a molecule with no partial charges 
A)  a positive ion 
B)  a negative ion 
C)  a neutral ion 
D)  a molecule with no partial charges

Question 16

-Use the figure to answer the following question. If two or more of these molecules are in proximity to one another, how will they bond together?

Accepted Answer

A)  hydrogen bonding, with two hydrogen atoms bonded together 
B)  covalent bonding, with two oxygen atoms bonded together 
C)  hydrogen bonding, with a hydrogen atom bonded to an oxygen atom 
D)  ionic bonding, with a hydrogen ion bonded to an oxygen atom 
A)  hydrogen bonding, with two hydrogen atoms bonded together 
B)  covalent bonding, with two oxygen atoms bonded together 
C)  hydrogen bonding, with a hydrogen atom bonded to an oxygen atom 
D)  ionic bonding, with a hydrogen ion bonded to an oxygen atom

Question 17

Which of the following is an element?

Accepted Answer

A)  water 
B)  methane 
C)  hydrogen 
D)  carbon dioxide 
A)  water 
B)  methane 
C)  hydrogen 
D)  carbon dioxide

Question 18

How do the concentrations of H+ and OH- compare to each other in an acidic solution?

Accepted Answer

A)  The concentration of H+ is higher. 
B)  The concentration of H+ is lower. 
C)  The concentration of H+ is the same. 
D)  Acidic solutions do not contain H+. 
A)  The concentration of H+ is higher. 
B)  The concentration of H+ is lower. 
C)  The concentration of H+ is the same. 
D)  Acidic solutions do not contain H+.

Question 19

The liquid interior of the chloroplast is called the

Accepted Answer

A)  centriole. 
B)  chromatin. 
C)  Golgi apparatus. 
D)  stroma. 
A)  centriole. 
B)  chromatin. 
C)  Golgi apparatus. 
D)  stroma.

Question 20

Which macromolecule has a sugar-phosphate backbone?

Accepted Answer

A)  lipid 
B)  nucleic acid 
C)  protein 
D)  polysaccharide 
A)  lipid 
B)  nucleic acid 
C)  protein 
D)  polysaccharide

Exam 2: Are We Alone in the Universe? Water, Biochemistry, and Cells

Which of the following has the lowest OH- concentration?

Enzymes are

What is the pH of a neutral solution?

An atom will be least likely to form chemical bonds with other atoms when

Proteins are composed of monomer subunits called ________ (two words).

The ________ (two words)defines the outer boundary of all cells, separating the cell's contents from its environment.

The reactions of cellular respiration occur in the

Which organelle performs photosynthesis?

The purported fossils in meteorite ALH84001 resemble modern prokaryotes called

Cholesterol is classified as a lipid because it contains a large proportion of

What kind of bond holds two water molecules to each other?

Which of the following pairs of molecules can be held together by a hydrogen bond?

Which organelle is represented by a network of membranes involved in the production of proteins?

According to the theory of evolution, which states that all life-forms on Earth arose from a common ancestor, all living organisms

Which of the following is nonpolar?

-Use the figure to answer the following question. If two or more of these molecules are in proximity to one another, how will they bond together?

Which of the following is an element?

How do the concentrations of H+ and OH- compare to each other in an acidic solution?

The liquid interior of the chloroplast is called the

Which macromolecule has a sugar-phosphate backbone?

Can Science Cure the Common Cold? Introduction to the Scientific Method

Is It Possible to Supplement Your Way to Better Health?

Fat: How Much is Right for You? Enzymes, Metabolism, and Cellular Respiration

Life in the Greenhouse: Photosynthesis and Global Warming

Cancer: DNA Synthesis, Mitosis, and Meiosis

Are You Only as Smart as Your Genes? Mendelian and Quantitative Genetics

DNA Detective: Complex Patterns of Inheritance and DNA Fingerprinting

Genetically Modified Organisms: Gene Expression, Mutation, and Cloning

Where Did We Come From? The Evidence for Evolution

An Evolving Enemy: Natural Selection

Who Am I? Species and Races

Prospecting for Biological Gold: Biodiversity and Classification

Is the Human Population Too Large? Population Ecology

Conserving Biodiversity: Community and Ecosystem Ecology

Where Do You Live? Climate and Biomes

Organ Donation: Tissues Organs and Organ Systems

Clearing the Air: Respiratory Cardiovascular and Excretory Systems

Vaccinations: Protection and Prevention or Peril? Immune System

Sex Differences and Athleticism: Endocrine Skeletal and Muscular Systems

Is There Something in the Water? Reproductive and Developmental Biology

Attention Deficit Disorder: Brain Structure and Function

Feeding the World: Plant Structure and Growth

Growing a Green Thumb: Plant Physiology

Filters

Which of the following has the lowest OH^- concentration?

How do the concentrations of H⁺ and OH^- compare to each other in an acidic solution?