Question 1

If an egg is soaked in vinegar for two days then salt water for two days, what factor explains why the egg's size changed during the experiment?

Accepted Answer

The egg was selectively permeable, and liquids diffused in and out of the egg by osmosis.

Answer

The egg was slightly shriveled on day 5 because it was placed in a hypotonic solution.

Answer

The egg could not undergo osmosis because it was placed in different solutions.

Answer

On day 3 the egg was the smallest because the shell had dissolved off of the egg

Question 2

Phagocytosis, or cellular eating, occurs when the dissolved materials enter the cell.

Pinocytosis, or cellular drinking, occurs when the plasma membrane folds inward to form a channel allowing dissolved substances to enter the cell. BOTH THESE ARE EXAMPLES OF ___.

Accepted Answer

Endocytosis

Answer

Diffusion

Answer

Mitosis

Answer

Exocytosis

Question 3

The image shows plant cells. What is represented by plant cell C?

Accepted Answer

Plant cell C was most likely placed in a hypertonic solution and underwent osmosis where it plasmolyzed.

Answer

Plant cell C was most likely placed in a hypotonic solution and underwent osmosis where it became turgid.

Answer

Plant cell C was likely placed in a isotonic solution and is perfect.

Answer

Plant cell C was most likely placed in a hypotonic solution and took in lots of water.

Question 4

Beaker B shows a red blood cell placed in a solution that is causing the water to leave the cell. Why is this happening?

Accepted Answer

This is osmosis and the red blood cells are releasing water because they have been placed in a hypertonic solution.

Answer

This is endocytosis and the red blood cells are releasing water because they have been placed in a hypertonic solution.

Answer

This is osmosis and the red blood cells are releasing water because they have been placed in a hypotonic solution.

Answer

This is diffusion and the red blood cells are releasing water because they have been placed in a hypertonic solution.

Question 5

Observe beaker A, what is the best explanation for what is happening?

Accepted Answer

The red blood cell is undergoing osmosis and is in a isotonic solution which means both the concentration of solute and water are equal.

Answer

The red blood cell is undergoing diffusion and is about to burst.

Answer

The red blood cell is undergoing osmosis and is in a hypotonic solution which means both the concentration of solute and water are equal.

Answer

The red blood cell is undergoing osmosis and is in a hypertonic solution.

Question 6

Looking at the image, explain what is happening in Beaker C.

Accepted Answer

Water is absorbed through osmosis which does not require energy

Answer

Water is released out of the cell because it is in a hypertonic solution through osmosis

Answer

Water is released through osmosis which does require energy

Answer

Water is absorbed because it is in a hypertonic solution through osmosis

Question 7

What is represented by the diagram?

Accepted Answer

Active Transport which requires energy

Answer

Active Transport which does not require energy

Answer

Passive Transport which requires energy

Answer

Passive Transport which does not require energy

Question 8

In the diagram, the cell on the right is plasmolyzed and the cell on the left is turgid. What does this mean and under what conditions would it be in this condition?

Accepted Answer

The cell on the right was placed in a hypertonic solution so it released water and shrank; the cell on the left was placed in a hypotonic solution so it absorbed water

Answer

The cells have all been placed in a hypertonic solution and they are dying.

Answer

The cell on the left was placed in a hypertonic solution so it released water and shrank; the cell on the right was placed in a hypotonic solution so it absorbed water

Answer

The cell on the right was placed in a isotonic solution so it released water and shrank; the cell on the left was placed in a hypertonic solution so it absorbed water

Question 9

The movement of solute molecules from an area of high concentration to low concentration is an example of

Accepted Answer

Diffusion which is Passive Transport

Answer

Diffusion which is Active Transport

Answer

Osmosis which is Passive Transport

Answer

Osmosis which is Active Transport

Question 10

A biologist observed a plant cell in a drop of water as shown in diagram A. The biologist added a 10% salt solution to the slide and observed the cell as shown in diagram B. The change in appearance of the cell resulted from

Accepted Answer

more water moving out of the cell than into the cell

Answer

more salt moving out of the cell than into the cell

Answer

more salt moving into the cell than out of the cell

Answer

more water moving into the cell than out of the cell

Question 11

When a molecule enters a cell with the help of proteins of its membrane, it has undergone

Accepted Answer

facilitated diffusion which is passive transport

Answer

Adhesion which is passive transport

Answer

Osmosis which is active transport

Answer

facilitated diffusion which is active transport

Question 12

In the diagram, the dark dots indicate small molecules. These molecules are moving out of the cells, as indicated by the arrows. The number of dots inside and outside of the two cells represents the relative concentrations of the molecules inside and outside of the cells.

ATP is being used to move the molecules out of the cell by

Accepted Answer

Cell A, only

Answer

both Cell A and Cell B

Answer

Neither Cell A nor Cell B

Answer

Cell B, only

Question 13

When placed in water wilted plants regain their leaf turgor because of the

Accepted Answer

osmosis of water into the plant cells

Answer

active transport of salts from the water into the plant cells

Answer

active transport of salts from the plant cells into the water

Answer

osmosis of water out of the plant cells

Answer

diffusion of water out of the plant cells

Question 14

The picture shows a wilted plant. What can be assumed about the cells of this plant?

Accepted Answer

Many cells within the plant have lost water and are no longer turgid

Answer

The stems of the plant have broken and can no longer support the weight of the leaves.

Answer

The plant has taken in too much water and its cells have plasmolyzed

Answer

Many cells within the plant have died and are no longer multiplying.

Question 15

Look at the U-tube below, the left side is a hypotonic solution and the right side is a hypertonic solution. What can you predict will happen after a period of time?

Accepted Answer

Osmosis will occur, the water on the left will flow through the semi-permeable membrane toward the higher concentration of solute.

Answer

The water is equal on both sides and will never change

Answer

The water will stay the same, but the solute molecules will move through the semi-permeable membrane.

Answer

The hypertonic solution will move from low to high concentration because this represents diffusion

Question 16

This diagram represents osmosis of water across a semipermeable membrane. The U-tube on the right shows the results of osmosis. What could you do to level the solutions in the two sides of the right hand U-tube?

Accepted Answer

Add more solute to the left hand side

Answer

Add more solute to the right hand side

Answer

Add more water to the left hand side

Answer

Add more water to the right hand side

Question 17

Observe the two beakers, which of the following statements is true.

Accepted Answer

Beaker A has a high concentration of solute and Beaker B has a low concentration of solute.

Answer

Beaker A has a low concentration of solute and Beaker B has a high concentration of solute.

Answer

Beaker A has a no solute and Beaker B has a low concentration of solute.

Answer

Beaker A and Beaker B have the same amount of solute, but Beaker B has more water.

Question 18

The diagram below represents osmosis, What type of the solution has the cell been placed in causing the water to move out of the cell?

Accepted Answer

hypertonic

Answer

isotonic

Answer

lyses

Answer

hypotonic

Question 19

The diagram below represents movement of a large molecule across a membrane. Which process is best represented in this diagram?

Accepted Answer

active transport

Answer

gene manipulation

Answer

diffusion

Answer

protein building

Question 20

The diagram below represents a section of a plasma membrane. What does structure X represent?

Accepted Answer

a lipid

Answer

glucose

Answer

a protein

Answer

glycogen

Question 21

Which statement regarding the functioning of the cell membrane of all organisms is not correct?

Accepted Answer

The cell membrane forms a barrier that keeps all substances that might harm the cell from entering the cell

Answer

The cell membrane controls the movement of molecules into and out of the cell.

Answer

The cell membrane is capable of receiving and recognizing chemical signals

Answer

The cell membrane forms a boundary that separates the cellular contents from the outside environment

Question 22

A red blood cell placed in distilled water will swell and burst (lyse) due to the diffusion of

Accepted Answer

water into the red blood cell

Answer

water from the blood cell into its environment

Answer

salt from the red blood cell into the water

Answer

salt from the water into the red blood cell

Question 23

The diagram below represents a cell in water. Formulas of molecules that can move freely across the cell membrane are shown. Some molecules are located inside the cell and others are in the water outside the cell