BIO 191 EXAM NEWEST 2024-2025 ACTUAL EXAM COMPLETE 350 QUESTIONS AND CORRECT DETAILED
ANSWERS
Two isotopes of the same element differ in the number of _____ - (answer) neutrons
It is the number of ______ in an atom's nucleus that determines what element the atom is - (answer)
protons
electronegativity for iconic bond - (answer) 1.8 < ∆en
electronegativity for polar covalent bond - (answer) 1.2 < ∆en < 1.8
electronegativity for non-polar covalent - (answer) ∆en < 1.2
do electrons carry a positive electrical charge - (answer) no they are negative. Protons are positive
Life on earth requires ___ different elements - (answer) 25
are hydrogens bonds a type of covalent bond? - (answer) No. Covalent bonds share electrons between
atoms. Hydrogen bonds are an attraction between partial positive and negative atoms in polar
molecules, but electrons are not shared between the atoms.
The vast majority of mass in an atom is located in in the ____ - (answer) nucleus
What does it mean when a chemical reaction is at equilibrium? - (answer) The forward reaction rate is
equal to the reverse reaction rate
There are four emergent proterties of water that are very important for life.
Water ice floats on liquid water.
Water makes up 60% of your body weight .
Water moderates temperatures .
Water is a very versatile solvent.
,BIO 191 EXAM NEWEST 2024-2025 ACTUAL EXAM COMPLETE 350 QUESTIONS AND CORRECT DETAILED
ANSWERS
Water has cohesion. - (answer) Water makes up 60% of your body weight
Acidic solution is one that..... - (answer) has more hydronium ions than hydroxide ions
True or false: Solid water ice is less dense than liquid water because hydrogen bonds get locked in place,
pushing the water molecules farther apart from each other than in liquid water. - (answer) true
A calorie is defined as ____ - (answer) The energy needed to heat 1 g of water by 1°C
What is the concentration of hydroxide ions [OH-], in a solution with pH = 11? - (answer) [OH-]= 10^-3
what emergent property of water allows some insects ( like water striders) to walk on the surface of
water ? - (answer) surface tension
hydrophobic substances can never dissolve in water at all - (answer) false
the high specific heat of water - (answer) ... helps transfer heat from the equator to the poles
... is caused by the many hydrogen bonds between water molecules
...makes sweating cool you off
...makes water need to absorb more energy to heat up 1°C than most substances.
What are the main modes of scientific inquiry - (answer) -inquiry-based Science
-mad science
-data-based science
-hypothesis-based science
-hypothesis-based science
-discovery-based science
-rocket science
,BIO 191 EXAM NEWEST 2024-2025 ACTUAL EXAM COMPLETE 350 QUESTIONS AND CORRECT DETAILED
ANSWERS
the most important mechanism that causes evolutionary change is _____ - (answer) natural selection
True or false: the living organisms on earth today are exactly the same as the living organisms on earth
ten million years ago - (answer) False: Evolution changes species over time. Our species (Homo
sapiens) has been around for less than a million years.
The theory of Abiogenesis says that life on earth initially formed from - (answer) nonliving precursors
What is true about genetic information?
-DNA is not found in prokaryotic cells
-All forms of life employ the same genetic code
-mRNA is the only type of RNA found in a eukaryotic cell
-A typical human liver cell has one set of chromosomes - (answer) All forms of life employ the same
genetic code
What was Charles Darwin's observation? - (answer) Many of the traits in an individual are heritable.
To understand the chemical basis of inheritance, we must understand the molecular structure of DNA.
This is an example of the application of which concept to the study of biology? - (answer) reductionism
Which of the following best describes a model organism?
-It is small, inexpensive to raise, and lives a long time.
-It is often pictured in textbooks and is easy for students to imagine.
-It has been chosen for study by early biologists.
-It is well studied, it is easy to propagate, and results are widely applicable. - (answer) It is well studied,
it is easy to propagate, and results are widely applicable.
In presenting data that result from an experiment, a group of students shows that most of their
measurements fall on a straight diagonal line on their graph. However, two of their data points are
"outliers" and fall far to one side of the expected relationship. Which of the following is the most
, BIO 191 EXAM NEWEST 2024-2025 ACTUAL EXAM COMPLETE 350 QUESTIONS AND CORRECT DETAILED
ANSWERS
reasonable way to handle the outliers when analyzing the data? - (answer) Show all results obtained
and then try to explore the reason(s) for the variation in data.
What makes a scientific hypothesis good? - (answer) It should be testable in a valid period of time
Which branch of biology is concerned with the naming and classifying of organisms? - (answer)
taxonomy
In an experiment to test the hypothesis, "temperature controls sex determination in crocodile embryos"
a researcher incubates crocodile eggs in incubators set at different temperatures. Which of the following
correctly identifies the dependent and independent variables in the experiment? - (answer) sex is
dependent, temperature is independent
How does a scientific theory differ from a scientific hypothesis? - (answer) Theories are usually an
explanation for a more general phenomenon; hypotheses typically address more specific issues.
In 1953, Stanley Miller built a closed system to try and simulate the chemical conditions of the early
earth. What molecule did he NOT add to his chamber? - (answer) O2
After his experimental chamber ran for a while, Stanley Miller pulled out samples of the liquid for
chemical analysis. What did he find had happened? - (answer) A variety of organic compounds had
been produced abiotically.
This functional group is acidic and can donate H+ ions to solutions. - (answer) Carboxyl
This functional group is basic and can absorb H+ ions from solutions - (answer) Amino
This functional group only contains carbon and hydrogen atoms. - (answer) Methyl
This functional group is polar and found in alcohols. - (answer) Hydroxyl
ANSWERS
Two isotopes of the same element differ in the number of _____ - (answer) neutrons
It is the number of ______ in an atom's nucleus that determines what element the atom is - (answer)
protons
electronegativity for iconic bond - (answer) 1.8 < ∆en
electronegativity for polar covalent bond - (answer) 1.2 < ∆en < 1.8
electronegativity for non-polar covalent - (answer) ∆en < 1.2
do electrons carry a positive electrical charge - (answer) no they are negative. Protons are positive
Life on earth requires ___ different elements - (answer) 25
are hydrogens bonds a type of covalent bond? - (answer) No. Covalent bonds share electrons between
atoms. Hydrogen bonds are an attraction between partial positive and negative atoms in polar
molecules, but electrons are not shared between the atoms.
The vast majority of mass in an atom is located in in the ____ - (answer) nucleus
What does it mean when a chemical reaction is at equilibrium? - (answer) The forward reaction rate is
equal to the reverse reaction rate
There are four emergent proterties of water that are very important for life.
Water ice floats on liquid water.
Water makes up 60% of your body weight .
Water moderates temperatures .
Water is a very versatile solvent.
,BIO 191 EXAM NEWEST 2024-2025 ACTUAL EXAM COMPLETE 350 QUESTIONS AND CORRECT DETAILED
ANSWERS
Water has cohesion. - (answer) Water makes up 60% of your body weight
Acidic solution is one that..... - (answer) has more hydronium ions than hydroxide ions
True or false: Solid water ice is less dense than liquid water because hydrogen bonds get locked in place,
pushing the water molecules farther apart from each other than in liquid water. - (answer) true
A calorie is defined as ____ - (answer) The energy needed to heat 1 g of water by 1°C
What is the concentration of hydroxide ions [OH-], in a solution with pH = 11? - (answer) [OH-]= 10^-3
what emergent property of water allows some insects ( like water striders) to walk on the surface of
water ? - (answer) surface tension
hydrophobic substances can never dissolve in water at all - (answer) false
the high specific heat of water - (answer) ... helps transfer heat from the equator to the poles
... is caused by the many hydrogen bonds between water molecules
...makes sweating cool you off
...makes water need to absorb more energy to heat up 1°C than most substances.
What are the main modes of scientific inquiry - (answer) -inquiry-based Science
-mad science
-data-based science
-hypothesis-based science
-hypothesis-based science
-discovery-based science
-rocket science
,BIO 191 EXAM NEWEST 2024-2025 ACTUAL EXAM COMPLETE 350 QUESTIONS AND CORRECT DETAILED
ANSWERS
the most important mechanism that causes evolutionary change is _____ - (answer) natural selection
True or false: the living organisms on earth today are exactly the same as the living organisms on earth
ten million years ago - (answer) False: Evolution changes species over time. Our species (Homo
sapiens) has been around for less than a million years.
The theory of Abiogenesis says that life on earth initially formed from - (answer) nonliving precursors
What is true about genetic information?
-DNA is not found in prokaryotic cells
-All forms of life employ the same genetic code
-mRNA is the only type of RNA found in a eukaryotic cell
-A typical human liver cell has one set of chromosomes - (answer) All forms of life employ the same
genetic code
What was Charles Darwin's observation? - (answer) Many of the traits in an individual are heritable.
To understand the chemical basis of inheritance, we must understand the molecular structure of DNA.
This is an example of the application of which concept to the study of biology? - (answer) reductionism
Which of the following best describes a model organism?
-It is small, inexpensive to raise, and lives a long time.
-It is often pictured in textbooks and is easy for students to imagine.
-It has been chosen for study by early biologists.
-It is well studied, it is easy to propagate, and results are widely applicable. - (answer) It is well studied,
it is easy to propagate, and results are widely applicable.
In presenting data that result from an experiment, a group of students shows that most of their
measurements fall on a straight diagonal line on their graph. However, two of their data points are
"outliers" and fall far to one side of the expected relationship. Which of the following is the most
, BIO 191 EXAM NEWEST 2024-2025 ACTUAL EXAM COMPLETE 350 QUESTIONS AND CORRECT DETAILED
ANSWERS
reasonable way to handle the outliers when analyzing the data? - (answer) Show all results obtained
and then try to explore the reason(s) for the variation in data.
What makes a scientific hypothesis good? - (answer) It should be testable in a valid period of time
Which branch of biology is concerned with the naming and classifying of organisms? - (answer)
taxonomy
In an experiment to test the hypothesis, "temperature controls sex determination in crocodile embryos"
a researcher incubates crocodile eggs in incubators set at different temperatures. Which of the following
correctly identifies the dependent and independent variables in the experiment? - (answer) sex is
dependent, temperature is independent
How does a scientific theory differ from a scientific hypothesis? - (answer) Theories are usually an
explanation for a more general phenomenon; hypotheses typically address more specific issues.
In 1953, Stanley Miller built a closed system to try and simulate the chemical conditions of the early
earth. What molecule did he NOT add to his chamber? - (answer) O2
After his experimental chamber ran for a while, Stanley Miller pulled out samples of the liquid for
chemical analysis. What did he find had happened? - (answer) A variety of organic compounds had
been produced abiotically.
This functional group is acidic and can donate H+ ions to solutions. - (answer) Carboxyl
This functional group is basic and can absorb H+ ions from solutions - (answer) Amino
This functional group only contains carbon and hydrogen atoms. - (answer) Methyl
This functional group is polar and found in alcohols. - (answer) Hydroxyl
