BIO 201 Exam questions and answers Graded
A+
A wristwatch suddenly stops working. After replacing the battery, the watch starts
working again. Which of the following statements correctly describes the
situation from the perspective of the scientific method?
A)This leads to the prediction that a battery is required for wristwatch operation.
B)This supports the hypothesis that a dead battery caused the wristwatch to stop
working.
C)This rejects the hypothesis that batteries last forever.
D)This substantiates the theory that all wristwatches require functional batteries.
E)This proves that a dead battery was the reason the wristwatch stopped
working. - ✅✅This supports the hypothesis that a dead battery caused the
wristwatch to stop working.
The cell membrane contains channels and pumps that help move materials from
one side to the other. What are these channels and pumps made of?
a. carbohydrates
b. lipids
c. bilipids
d. proteins - ✅✅proteins
Which of the following is true of osmosis?
a. Osmosis moves against the water concentration gradient
b. Osmosis is the movement of oxygen across a membrane
c. Osmosis is a type of passive transport
, d. Osmosis requires the use of the energy molecule ATP - ✅✅Osmosis is a type
of passive transport (Passive transport=no energy)
Which of the following statements about passive transport is true?
a. Membrane proteins are always needed to take place
b. Substances move from areas of high concentration to areas of low
concentration
c. The input of ATP is required to facilitate transportation
d. Passive transport refers only to the movement of water molecules -
✅✅Substances move from areas of high concentration to areas of low
concentration
Sarah placed a collection of red blood cells into a container filled with an
unknown solution. Once in the container, Sarah noticed that the red blood cells
swelled and some of them burst. What type of solution were the cells placed in?
a. A hypotonic solution
b. A hypertonic solution
c. An isotonic solution
d. None of the above - ✅✅A hypotonic solution
Which of the following molecules passes through a semipermeable membrane
during the process of osmosis?
a. Proteins
b. Glucose
c. Sodium
d. Water - ✅✅water
A+
A wristwatch suddenly stops working. After replacing the battery, the watch starts
working again. Which of the following statements correctly describes the
situation from the perspective of the scientific method?
A)This leads to the prediction that a battery is required for wristwatch operation.
B)This supports the hypothesis that a dead battery caused the wristwatch to stop
working.
C)This rejects the hypothesis that batteries last forever.
D)This substantiates the theory that all wristwatches require functional batteries.
E)This proves that a dead battery was the reason the wristwatch stopped
working. - ✅✅This supports the hypothesis that a dead battery caused the
wristwatch to stop working.
The cell membrane contains channels and pumps that help move materials from
one side to the other. What are these channels and pumps made of?
a. carbohydrates
b. lipids
c. bilipids
d. proteins - ✅✅proteins
Which of the following is true of osmosis?
a. Osmosis moves against the water concentration gradient
b. Osmosis is the movement of oxygen across a membrane
c. Osmosis is a type of passive transport
, d. Osmosis requires the use of the energy molecule ATP - ✅✅Osmosis is a type
of passive transport (Passive transport=no energy)
Which of the following statements about passive transport is true?
a. Membrane proteins are always needed to take place
b. Substances move from areas of high concentration to areas of low
concentration
c. The input of ATP is required to facilitate transportation
d. Passive transport refers only to the movement of water molecules -
✅✅Substances move from areas of high concentration to areas of low
concentration
Sarah placed a collection of red blood cells into a container filled with an
unknown solution. Once in the container, Sarah noticed that the red blood cells
swelled and some of them burst. What type of solution were the cells placed in?
a. A hypotonic solution
b. A hypertonic solution
c. An isotonic solution
d. None of the above - ✅✅A hypotonic solution
Which of the following molecules passes through a semipermeable membrane
during the process of osmosis?
a. Proteins
b. Glucose
c. Sodium
d. Water - ✅✅water
