BIOL111: TAMU Runshie Xie -
Cumulative Final - All Practice Exam
Questions Fully Solved.
The method of scientific inquiry that describes natural structures and processes as accurately as
possible through careful observation and the analysis of data is known as - Answer discovery
science.
Which of the following order is correct in terms of the hierarchy of the organization from largest
to smallest? - Answer Biosphere → Ecosystem →Community → Population → Organism
Oxygen has an atomic number of 8 and, most commonly, a mass number of 16. Thus, what is
the atomic mass of an oxygen atom? - Answer approximately 16 daltons
Increased atmospheric CO2 concentrations might have what effect on seawater? - Answer
Seawater will become more acidic, and carbonate concentrations will decrease.
A covalent bond is likely to be polar when ________. - Answer one of the atoms sharing
electrons is more electronegative than the other atom
A solution with a pH of 2 has how many more protons in it than a solution with a pH of 4? -
Answer 100 times more
An ion with six protons, seven neutrons, and a charge of 2+ has an atomic number of ________.
- Answer six
All of the live oak trees (Quercus fusiformis) found in the Texas Hill Country could be referred to
as a _______________. - Answer population
What is the maximum number of covalent bonds that an oxygen atom with atomic number 8
can make with hydrogen? - Answer 2
Van der Waals interactions may result when ________. - Answer electrons are not
symmetrically distributed in a molecule
Which of the following is true of carbon?
It can form both polar and nonpolar bonds.
,It can form a maximum of three covalent bonds with other elements.
It forms only polar molecules.
It is highly electronegative. - Answer It can form both polar and nonpolar bonds.
Which of the following types of cells utilize deoxyribonucleic acid (DNA) as their genetic
material but do not have their DNA encased within a nuclear envelope?
archaean
fungi
animal
plant - Answer archaean
Why does ice float in liquid water?
The crystalline lattice of ice causes it to be denser than liquid water.
Stable hydrogen bonds keep water molecules of ice farther apart than water molecules of liquid
water.
The ionic bonds between the molecules in ice prevent the ice from sinking.
The high surface tension of liquid water keeps the ice on top. - Answer Stable hydrogen
bonds keep water molecules of ice farther apart than water molecules of liquid water.
A scientist, who wants to study the effects of nitrogen on wheat plants, sets up an experiment
with 4 groups of wheat plants: group A gets 20 pounds per acre, group B gets 40 pounds per
acre, group C gets 60 pounds per acre, and group D gets 0 pounds per acre. Which of the
following is the control group?
group A
group B
group C
group D - Answer Group D
You work on a project where psilocybin is being reviewed for its ability to treat mild depression.
You are asked to weigh out the compound for creating a test solution. The molecular weight of
psilocybin is approximately 284.25 g/mol. You need to produce 25 mL of a 300 mM solution of
psilocybin. How much psilocybin do you need to weigh out and add to water?
2.13 g
0.2103 g
,2103.0 g
2.84 g - Answer 2.13g
Which of the following best describes the logic of scientific inquiry?
If my experiments are set up right, they will lead to a testable hypothesis.
If my hypothesis is correct, I can expect certain test results.
If I generate a testable hypothesis, tests and observations will support it.
If my observations are accurate, they will support my hypothesis - Answer If my hypothesis is
correct, I can expect certain test results.
Which of the following provides the information necessary to stipulate a protein's 3-D shape?
sequence of amino acids in the polypeptide chain
number of water molecules in the vicinity
side chains of various amino acids
peptide bonds between different amino acids - Answer sequence of amino acids in the
polypeptide chain
How many molecules of water are released during the polymerization of a 14 monomer-long
cellulose molecule?
40
20
13
10 - Answer 13
What is the pH of a solution with a hydroxyl ion (OH-) concentration of 10-10 M?
pH 10
pH 2
pH 4
pH 12 - Answer pH 4
The atomic number of nitrogen is 7. Nitrogen-15 has a greater mass number than nitrogen-14
because the atomic nucleus of nitrogen-15 contains ________.
, 8 protons
8 neutrons
7 neutrons
15 protons - Answer 8 neutrons
What's an enantiomer? - Answer An enantiomer is one of two stereoisomers that are non-
superimposable mirror images of each other, like left and right hands.
Water molecules can form hydrogen bonds with ________.
compounds that have polar covalent bonds
oils
oxygen gas (O2) molecules
chloride ions
only other water molecules - Answer compounds that have polar covalent bonds
Which of the following correctly describes chemical equilibrium?
Forward and reverse reactions continue with no net effect on the concentrations of the
reactants and products.
There are equal concentrations of reactants and products, and the reactions have stopped.
Concentrations of products are higher than the concentrations of the reactants.
There are equal concentrations of products and reactants while forward and reverse reactions
continue. - Answer Forward and reverse reactions continue with no net effect on the
concentrations of the reactants and products.
Why are hydrocarbons insoluble in water?
The majority of their bonds are polar covalent carbon-to-hydrogen linkages.
They exhibit considerable molecular complexity and diversity.
They are less dense than water.
The majority of their bonds are nonpolar covalent carbon-to-hydrogen linkages - Answer The
majority of their bonds are nonpolar covalent carbon-to-hydrogen linkages.
In an ethane (C2H6) molecule, each carbon atom is bonded to ________ hydrogen atoms.
Cumulative Final - All Practice Exam
Questions Fully Solved.
The method of scientific inquiry that describes natural structures and processes as accurately as
possible through careful observation and the analysis of data is known as - Answer discovery
science.
Which of the following order is correct in terms of the hierarchy of the organization from largest
to smallest? - Answer Biosphere → Ecosystem →Community → Population → Organism
Oxygen has an atomic number of 8 and, most commonly, a mass number of 16. Thus, what is
the atomic mass of an oxygen atom? - Answer approximately 16 daltons
Increased atmospheric CO2 concentrations might have what effect on seawater? - Answer
Seawater will become more acidic, and carbonate concentrations will decrease.
A covalent bond is likely to be polar when ________. - Answer one of the atoms sharing
electrons is more electronegative than the other atom
A solution with a pH of 2 has how many more protons in it than a solution with a pH of 4? -
Answer 100 times more
An ion with six protons, seven neutrons, and a charge of 2+ has an atomic number of ________.
- Answer six
All of the live oak trees (Quercus fusiformis) found in the Texas Hill Country could be referred to
as a _______________. - Answer population
What is the maximum number of covalent bonds that an oxygen atom with atomic number 8
can make with hydrogen? - Answer 2
Van der Waals interactions may result when ________. - Answer electrons are not
symmetrically distributed in a molecule
Which of the following is true of carbon?
It can form both polar and nonpolar bonds.
,It can form a maximum of three covalent bonds with other elements.
It forms only polar molecules.
It is highly electronegative. - Answer It can form both polar and nonpolar bonds.
Which of the following types of cells utilize deoxyribonucleic acid (DNA) as their genetic
material but do not have their DNA encased within a nuclear envelope?
archaean
fungi
animal
plant - Answer archaean
Why does ice float in liquid water?
The crystalline lattice of ice causes it to be denser than liquid water.
Stable hydrogen bonds keep water molecules of ice farther apart than water molecules of liquid
water.
The ionic bonds between the molecules in ice prevent the ice from sinking.
The high surface tension of liquid water keeps the ice on top. - Answer Stable hydrogen
bonds keep water molecules of ice farther apart than water molecules of liquid water.
A scientist, who wants to study the effects of nitrogen on wheat plants, sets up an experiment
with 4 groups of wheat plants: group A gets 20 pounds per acre, group B gets 40 pounds per
acre, group C gets 60 pounds per acre, and group D gets 0 pounds per acre. Which of the
following is the control group?
group A
group B
group C
group D - Answer Group D
You work on a project where psilocybin is being reviewed for its ability to treat mild depression.
You are asked to weigh out the compound for creating a test solution. The molecular weight of
psilocybin is approximately 284.25 g/mol. You need to produce 25 mL of a 300 mM solution of
psilocybin. How much psilocybin do you need to weigh out and add to water?
2.13 g
0.2103 g
,2103.0 g
2.84 g - Answer 2.13g
Which of the following best describes the logic of scientific inquiry?
If my experiments are set up right, they will lead to a testable hypothesis.
If my hypothesis is correct, I can expect certain test results.
If I generate a testable hypothesis, tests and observations will support it.
If my observations are accurate, they will support my hypothesis - Answer If my hypothesis is
correct, I can expect certain test results.
Which of the following provides the information necessary to stipulate a protein's 3-D shape?
sequence of amino acids in the polypeptide chain
number of water molecules in the vicinity
side chains of various amino acids
peptide bonds between different amino acids - Answer sequence of amino acids in the
polypeptide chain
How many molecules of water are released during the polymerization of a 14 monomer-long
cellulose molecule?
40
20
13
10 - Answer 13
What is the pH of a solution with a hydroxyl ion (OH-) concentration of 10-10 M?
pH 10
pH 2
pH 4
pH 12 - Answer pH 4
The atomic number of nitrogen is 7. Nitrogen-15 has a greater mass number than nitrogen-14
because the atomic nucleus of nitrogen-15 contains ________.
, 8 protons
8 neutrons
7 neutrons
15 protons - Answer 8 neutrons
What's an enantiomer? - Answer An enantiomer is one of two stereoisomers that are non-
superimposable mirror images of each other, like left and right hands.
Water molecules can form hydrogen bonds with ________.
compounds that have polar covalent bonds
oils
oxygen gas (O2) molecules
chloride ions
only other water molecules - Answer compounds that have polar covalent bonds
Which of the following correctly describes chemical equilibrium?
Forward and reverse reactions continue with no net effect on the concentrations of the
reactants and products.
There are equal concentrations of reactants and products, and the reactions have stopped.
Concentrations of products are higher than the concentrations of the reactants.
There are equal concentrations of products and reactants while forward and reverse reactions
continue. - Answer Forward and reverse reactions continue with no net effect on the
concentrations of the reactants and products.
Why are hydrocarbons insoluble in water?
The majority of their bonds are polar covalent carbon-to-hydrogen linkages.
They exhibit considerable molecular complexity and diversity.
They are less dense than water.
The majority of their bonds are nonpolar covalent carbon-to-hydrogen linkages - Answer The
majority of their bonds are nonpolar covalent carbon-to-hydrogen linkages.
In an ethane (C2H6) molecule, each carbon atom is bonded to ________ hydrogen atoms.
