BIO207 Final UPDATED ACTUAL Exam
Questions and CORRECT Answers
A mystery sample is collected from a robot that went on a space expedition. How would you as a
scientist determine that the sample is actually a living cell? - CORRECT ANSWER - It
can independently give rise to another one like it
You are asked to classify a cell which has a plasma membrane, a cell wall and DNA. Based on
this information only, we can basically conclude that this cell could belong to which kingdom? -
CORRECT ANSWER - it can belong to either arches, bacteria or eukaryote
A common gas CO2 is represented by this covalent bond relationship between the atoms of
carbon and oxygen O=C=O. Carbon has an electronegativity value of 2.5 while oxygen has an
electronegativity value of 3.5. Based on the above information depicting the bond between two
oxygen atoms and one carbon, what would you expect a CO2 molecules chemical properties to
be? - CORRECT ANSWER - Non polar covalent
Which one of these options would be found in the cells of a vegetable but not in the cells of a
person eating it? plasma membrane, mitochondria, ER, chloroplasts, nuclei - CORRECT
ANSWER - chloroplasts
which biological polymers is defined by a physical property rather than a chemical structure? -
CORRECT ANSWER - lipids
A novel phospholipid was synthesized by a scientist that has a hydrophobic, non polar head and
a hydrophilic, polar tail. If this formed a bilayer, what would be the predicted order of
arrangement of this molecule in an environment surrounded by water. - CORRECT
ANSWER - it would form a bilayer in a head to head arrangement
As you are staring at the raindrops running down your window on a rainy day, you notice that
the raindrops remain more or less intact, even as they cascade dow the windowpane. This is a
result of: - CORRECT ANSWER - hydrogen bonds between water molecules
,What molecules are commonly used for energy storage in living organisms? - CORRECT
ANSWER - lipids and cabohydrates
Molecular oxygen (O2), which is required for the production of ATP by mitochondria, must pass
through at least three membranes to get to the enzymes where it is used. O2 is also produced in
chloroplasts and must pass through at least four membranes to be released from the plant. How
do you supposed O2 moves across biological membranes? - CORRECT ANSWER - O2 is
non polar and very small so it can diffuse across the membrane
The dentist tells his patient to rinse with salt water after a procedure. She stirs a tablespoon of
salt into a cup of warm water, and watches it dissolve. Why does the salt dissolve in water? -
CORRECT ANSWER - The positive hydrogen atoms in water molecules are attracted to
chlorine ions, and the negative oxygen atoms in water molecules are attracted to sodium ions
Defects in which of the following cellular structures is most likely responsible for a condition
called "exercise intolerance," where individuals suffer extreme fatigue from minimal exertion
due to lack of energy? - CORRECT ANSWER - mitochondria
The process of a vesicle fusing with the plasma membrane and depositing its contents into the
extracellular space is most specifically referred to as - CORRECT ANSWER - exocytosis
what factors are required for facilitated transport to occur - CORRECT ANSWER -a
concentration gradient, a plasma membrane with its component parts and a transport protein
Why does active transport require ATP energy? - CORRECT ANSWER - to allow the
movement of molecules from low to high concentration
Which is a point of similarity between prokaryotes and eukaryotes? - CORRECT
ANSWER - presence of ribosomes
a cell was discovered in a research lab that had a plasma membrane but no transmembrane
proteins. In a biochemical analysis of the molecules diffused into the cell, what molecule would
, face an obstacle of not being transported because of its chemical properties? - CORRECT
ANSWER - Na+ ion
A cell that reacts to an environmental condition by secreting a molecule for physiological
changes to occur, such as fight or flight responses, is an example of which of the following
elements of cellular communication? - CORRECT ANSWER - a signaling cell
what types of cellular activities can be a response to cell signaling? - CORRECT
ANSWER - Cell division is triggered, gene expression patterns are changed, enzymes are
activated, and cell signals are released to communicate with other cells
Which types of cell signaling generally occurs between cells that are distant from each other? -
CORRECT ANSWER - endocrine
Many mutations in receptor kinases that lead to cancer allow the dimerization and activation of
the receptor, even in the absence of signaling molecule. A drug that prevents dimerization of
receptor kinases is being tested for its effectiveness in stopping cancer. At which stage would
this drug work? - CORRECT ANSWER - It would prevent the receptor from becoming
activated
Which type of cell relies on a specific ligand binding to a specific receptor? - CORRECT
ANSWER - G protein couples receptors, endocrine signals that pass through the blood
stream, kinase receptors and ligand gated ion channels
An increased heart rate caused by the release of adrenaline from the adrenal glands which binds
receptors on the cardiac cells is an example of___ - CORRECT ANSWER - endocrine
signaling
what would not be considered a cell surface receptor? - CORRECT ANSWER - a receptor
that binds a on polar steroid hormone and activates transcription
You are examining a specimen first with the 4x objective (low power). You are able to observe
20 cylindrical cells aligned along the diameter of the viewing field. If you switch to the 40x
Questions and CORRECT Answers
A mystery sample is collected from a robot that went on a space expedition. How would you as a
scientist determine that the sample is actually a living cell? - CORRECT ANSWER - It
can independently give rise to another one like it
You are asked to classify a cell which has a plasma membrane, a cell wall and DNA. Based on
this information only, we can basically conclude that this cell could belong to which kingdom? -
CORRECT ANSWER - it can belong to either arches, bacteria or eukaryote
A common gas CO2 is represented by this covalent bond relationship between the atoms of
carbon and oxygen O=C=O. Carbon has an electronegativity value of 2.5 while oxygen has an
electronegativity value of 3.5. Based on the above information depicting the bond between two
oxygen atoms and one carbon, what would you expect a CO2 molecules chemical properties to
be? - CORRECT ANSWER - Non polar covalent
Which one of these options would be found in the cells of a vegetable but not in the cells of a
person eating it? plasma membrane, mitochondria, ER, chloroplasts, nuclei - CORRECT
ANSWER - chloroplasts
which biological polymers is defined by a physical property rather than a chemical structure? -
CORRECT ANSWER - lipids
A novel phospholipid was synthesized by a scientist that has a hydrophobic, non polar head and
a hydrophilic, polar tail. If this formed a bilayer, what would be the predicted order of
arrangement of this molecule in an environment surrounded by water. - CORRECT
ANSWER - it would form a bilayer in a head to head arrangement
As you are staring at the raindrops running down your window on a rainy day, you notice that
the raindrops remain more or less intact, even as they cascade dow the windowpane. This is a
result of: - CORRECT ANSWER - hydrogen bonds between water molecules
,What molecules are commonly used for energy storage in living organisms? - CORRECT
ANSWER - lipids and cabohydrates
Molecular oxygen (O2), which is required for the production of ATP by mitochondria, must pass
through at least three membranes to get to the enzymes where it is used. O2 is also produced in
chloroplasts and must pass through at least four membranes to be released from the plant. How
do you supposed O2 moves across biological membranes? - CORRECT ANSWER - O2 is
non polar and very small so it can diffuse across the membrane
The dentist tells his patient to rinse with salt water after a procedure. She stirs a tablespoon of
salt into a cup of warm water, and watches it dissolve. Why does the salt dissolve in water? -
CORRECT ANSWER - The positive hydrogen atoms in water molecules are attracted to
chlorine ions, and the negative oxygen atoms in water molecules are attracted to sodium ions
Defects in which of the following cellular structures is most likely responsible for a condition
called "exercise intolerance," where individuals suffer extreme fatigue from minimal exertion
due to lack of energy? - CORRECT ANSWER - mitochondria
The process of a vesicle fusing with the plasma membrane and depositing its contents into the
extracellular space is most specifically referred to as - CORRECT ANSWER - exocytosis
what factors are required for facilitated transport to occur - CORRECT ANSWER -a
concentration gradient, a plasma membrane with its component parts and a transport protein
Why does active transport require ATP energy? - CORRECT ANSWER - to allow the
movement of molecules from low to high concentration
Which is a point of similarity between prokaryotes and eukaryotes? - CORRECT
ANSWER - presence of ribosomes
a cell was discovered in a research lab that had a plasma membrane but no transmembrane
proteins. In a biochemical analysis of the molecules diffused into the cell, what molecule would
, face an obstacle of not being transported because of its chemical properties? - CORRECT
ANSWER - Na+ ion
A cell that reacts to an environmental condition by secreting a molecule for physiological
changes to occur, such as fight or flight responses, is an example of which of the following
elements of cellular communication? - CORRECT ANSWER - a signaling cell
what types of cellular activities can be a response to cell signaling? - CORRECT
ANSWER - Cell division is triggered, gene expression patterns are changed, enzymes are
activated, and cell signals are released to communicate with other cells
Which types of cell signaling generally occurs between cells that are distant from each other? -
CORRECT ANSWER - endocrine
Many mutations in receptor kinases that lead to cancer allow the dimerization and activation of
the receptor, even in the absence of signaling molecule. A drug that prevents dimerization of
receptor kinases is being tested for its effectiveness in stopping cancer. At which stage would
this drug work? - CORRECT ANSWER - It would prevent the receptor from becoming
activated
Which type of cell relies on a specific ligand binding to a specific receptor? - CORRECT
ANSWER - G protein couples receptors, endocrine signals that pass through the blood
stream, kinase receptors and ligand gated ion channels
An increased heart rate caused by the release of adrenaline from the adrenal glands which binds
receptors on the cardiac cells is an example of___ - CORRECT ANSWER - endocrine
signaling
what would not be considered a cell surface receptor? - CORRECT ANSWER - a receptor
that binds a on polar steroid hormone and activates transcription
You are examining a specimen first with the 4x objective (low power). You are able to observe
20 cylindrical cells aligned along the diameter of the viewing field. If you switch to the 40x
