Category Archives: Quiz/Flashcard Sets

Mitosis Quiz from sciencemusicvideos

Mitosis Quiz: Key Concepts. A quiz from sciencemusicvideos

This quiz tests you about the significance of cell division. Among other things, it tests you on this diagram. Let your cursor hover over it to see a key.

majorEventsInMitosis

Major events in cell division

[qwiz random = “true” qrecord_id=”sciencemusicvideosMeister1961-mitosisKeyConcepts”]

[h] Quiz: key mitosis concepts

[i] Here’s how these quizzes work:

  • Each question is multiple choice, but the entire quiz is like a series of flashcards.
  • If you get the question right, it comes off the deck.
  • If you get the question wrong, it goes to the bottom of the deck, so you can try it again.

[!]QUESTION 1+++++++++++++++[/!]

[q] 1. Which of the following is NOT a function that cell division plays in multicellular organisms?

[c] repairing damaged tissues

[c] providing additional cells for growth

[c*] sending signals throughout your body.

[f] No. Note that this question is asking you ‘which is NOT a function of cell division.’ The way that your body repairs damaged tissues is by replacing the damaged cells, and that happens through cell division. Next time you see this question, try to identify a function that’s NOT connected to cell division.

[f] No. Note that this question is asking you ‘which is NOT a function of cell division.’ The primary way that you grew from being a single celled zygote (fertilized egg) to the person with trillions of cells that you are now was through adding additional cells, and that happens through cell division. Next time you see this question, try to identify a function that’s NOT connected to cell division.

[f] Yes! Signaling happens either through waves of ions flowing along nerve cell membranes, or through release of hormones into the bloodstream. In other words, cell division doesn’t play any direct role in these processes.

[!]QUESTION 2+++++++++++++++[/!]

[q] 2. Which of the following diseases is most directly related to abnormal cell division?

[c*] cancer

[c] cystic fibrosis

[c] Heart attack

[c] Diabetes

[f] Exactly. Cancer is a disease of abnormal cell division.

[f] No. Cystic fibrosis is a genetic disease caused by the malfunction of a chlorine ion transporter in the cell membranes of  cells in your lungs and other organs. Next time, choose a disease that is directly related to cell division.

[f] No. Heart attacks are caused by blocked arteries in the heart, which cause the cells downstream of the blockage to become damaged (or even die). Next time, choose a disease that is directly related to cell division.

[f] No. Diabetes is a metabolic disease involving the body’s inability to control blood sugar levels. Next time, choose a disease that is directly related to cell division.

[!]QUESTION 3+++++++++++++++[/!]

[q] 3. Genetically, what’s the relationship between the daughter cells that result from cell division, and the parent cell?

[c] The relationship is exactly like the relationship between the mother and a daughter in a human family.

[c*] The daughter cells from mitosis and cell division are exact duplicates, or clones of each other, and of the parent cell.

[c] The daughter cells are identical to each other, but only half-way related to the mother (just like identical twins in a human family).

[f] No. In a human family, a daughter receives half of her DNA from her mother, and half from her father. In mitosis and cell division, the daughter cells receive all of their DNA from the parent cell. In fact, the parent cell, after cell division, no longer exists. It has become the daughter cell, each of which is half new, and half old.

[f] That’s exactly right. Each daughter cell is identical to the other daughter cell, and to the parent cell.  In fact, the parent cell, after cell division, no longer exists. It has become the daughter cells, each of which is half new, and half old.

[f] No. Unlike human identical twins, the cells that result from mitosis and cell division are not only exact genetic copies of one another. They’re also exact copies of the parent cell (who no longer really exists, having become the two daughter cells).

[!]QUESTION 4+++++++++++++++[/!]

[q] 4. In the diagram below (showing the major events in cell division), which number is showing the separation of sister chromatids?

[c] 1

[c] 2

[c*] 3

[c] 4

[f] No. In this first step, single chromosomes are becoming doubled chromosomes, each consisting of two sister chromatids. Next time, look for a step where these sister chromatids are being separated into single chromosomes

[f] No. After step 1, the chromosomes are doubled, consisting of two sister chromatids. In step 2, the spindle apparatus is being constructed. Next time, look for a step where these sister chromatids are being separated into single chromosomes.

[f] Awesome! After step 1, the chromosomes are doubled, consisting of two sister chromatids. In step 2, the spindle apparatus is being constructed. In step 3, the sister chromatids are being pulled apart.

[f] No. By step four, the sister chromatids have already been pulled apart into single chromosomes, and the cell is splitting in half, a process called cytokinesis. Next time, look for a step where doubled chromosomes (also known as sister chromatids) are being separated into single chromosomes.

[!]QUESTION 5+++++++++++++++[/!]

[q]5. In the diagram below (showing the major events in cell division), which number is showing chromosome duplication?

[c*] 1

[c] 2

[c] 3

[c] 4

[f] Exactly. In step 1, single chromosomes are being duplicated, becoming doubled chromosomes consisting of two sister chromatids.

[f] No. In step 2, the spindle apparatus is being constructed. The chromosomes are already doubled, and have a characteristic ‘X’ shaped form. Next time, look for a step where single chromosomes (which don’t look like an ‘X,’ are being doubled so that they do look like an ‘X.’

[f] No. In step 3, the sister chromatids are being pulled apart. Next time, look for a step where single chromosomes (which don’t look like an ‘X,’ are being doubled so that they do look like an ‘X.’

[f] No. In step 4,  the cell is splitting in half, a process called cytokinesis. Next time, look for a step where single chromosomes (which don’t look like an ‘X,’ are being doubled so that they do look like an ‘X.’

[!]QUESTION 6+++++++++++++++[/!]

[q]6. In the diagram below (showing the major events in cell division), which number is showing cytokinesis?

[c] 1

[c] 2

[c] 3

[c*] 4

[f] No. In step 1, single chromosomes are being duplicated, becoming doubled chromosomes consisting of two sister chromatids. Next time, look for a step that shows one cell becoming two cells.

[f] No. In step 2, the spindle apparatus is being constructed. Next time, look for a step that shows one cell becoming two cells.

[f] No. In step 3, the sister chromatids are being pulled apart. Next time, look for a step that shows one cell becoming two cells.

[f] Perfect! In step 4,  the cell is splitting in half, a process called cytokinesis.

[!]QUESTION 7+++++++++++++++[/!]

[q]7. In the diagram below (showing the major events in cell division), which number is showing the creation of the spindle apparatus, which is the mechanism for pulling doubled chromosomes (also known as sister chromatids) apart?

[c] 1

[c*] 2

[c] 3

[c] 4

[f] No. In step 1, single chromosomes are being duplicated, becoming doubled chromosomes consisting of two sister chromatids. Next time, look for a step that shows the appearance of an array of fibers in the cell. These fibers make up the spindle apparatus, and their function is to pull apart the sister chromatids.

[f] Terrific! In step 2, the spindle apparatus is being constructed.

[f] No. In step 3, the sister chromatids are being pulled apart. Next time, look for a step that shows the appearance of an array of fibers in the cell. These fibers make up the spindle apparatus, and their function is to pull apart the sister chromatids.

[f] No. In step 4,  the cell is splitting in half, a process called cytokinesis. Next time, look for a step that shows the appearance of an array of fibers in the cell. These fibers make up the spindle apparatus, and their function is to pull apart the sister chromatids.

[!]QUESTION 8+++++++++++++++[/!]

[q]8. In the diagram below (showing the major events in cell division), which number shows replication of DNA?

[c*] 1

[c] 2

[c] 3

[c] 4

[f] Nice! In step 1, single chromosomes are being duplicated, becoming doubled chromosomes consisting of two sister chromatids. Doubling of chromosomes comes about through replication of DNA.

[f] No. In step 2, the spindle apparatus is being constructed. DNA replication occurs as single chromosomes (which don’t look like an ‘X’) become doubled chromosomes (which do look like an ‘X’). Next time, find a step where this change in chromosome appearance occurs.

[f] No. In step 3, the sister chromatids are being pulled apart. DNA replication occurs as single chromosomes (which don’t look like an ‘X’) become doubled chromosomes (which do look like an ‘X’). Next time, find a step where this change in chromosome appearance occurs.

[f] No. In step 4,  the cell is splitting in half, a process called cytokinesis. DNA replication occurs as single chromosomes (which don’t look like an ‘X’) become doubled chromosomes (which do look like an ‘X’). Next time, find a step where this change in chromosome appearance occurs.

[x]
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[/qwiz]

For more mitosis quizzes, please go to http://www.sciencemusicvideos.com/mitosis-quizzes/

Conceptual chemistry quiz

[qwiz]

[h] Chemistry concepts

[i] The 22 questions in this quiz are usually given to first-year college students beginning a general Chemistry class.  It measures their understanding of general Chemistry concepts.  Students taking this test averaged only about 45% correct.  When you understand why the right answers to these questions are the right answers you have excellent Chemistry knowledge!

[!!!] ————— 1 ————- [/!!!]
[q] Which of the following must be the same before and after a chemical reaction?
[c] a. The sum of the masses of all substances involved.
[c] b. The number of molecules of all substances involved.
[c] c. The number of atoms of each type involved.
[c*] d. Both (a) and (c) must be the same.
[c] e. (e) Each of the answers (a), (b), and (c) must be the same.

[!!!] ————— 2 ————- [/!!!]
[q] Assume a beaker of pure water has been boiling for 30 minutes. What is in the bubbles in the boiling water?
[c] a. Air.
[c] b. Oxygen gas and hydrogen gas.
[c] c. Oxygen.
[c*] d. Water vapor.
[c] e. Heat.

[!!!] ————— 3 ————- [/!!!]
[q] A glass of cold milk sometimes forms a coat of water on the outside of the glass (Often referred to as ‘sweat’). How does most of the water get there?
[c] a. Water evaporates from the milk and condenses on the outside of the glass.
[c] b. The glass acts like a semi-permeable membrane and allows the water to pass, but not the milk.
[c*] c. Water vapor condenses from the air.
[c] d. The coldness causes oxygen and hydrogen from the air combine on the glass forming water.

[!!!] ————— 4 ————- [/!!!]
[q] What is the mass of the solution when 1 pound of salt is dissolved in 20 pounds of water?
[c] a. 19 Pounds.
[c] b. 20 Pounds.
[c] c. Between 20 and 21 pounds.
[c*] d. 21 pounds.
[c] e. More than 21 pounds.

[!!!] ————— 5 ————- [/!!!]
[q] The diagram represents a mixture of S atoms and O2 molecules in a closed container.

Which diagram shows the results after the mixture reacts as completely as possible according to the equation:

2S + 3O2 → 2SO3

[c] a. [c] b. [c] c. [c*] d. [c] e.

[!!!] ————— 6 ————- [/!!!]
[q] The circle on the left shows a magnified view of a very small portion of liquid water in a closed container.

What would the magnified view show after the water evaporates?

[c] a. [c] b. [c] c. [c] d. [c*] e.
[!!!] ————— 7 ————- [/!!!]
[q] True or False: When a match burns, some matter is destroyed.
[c] a. True
[c*] b. False

[!!!] ————— 8 ————- [/!!!]
[q] What is the reason for your answer to the previous question? (True or False: When a match burns, some matter is destroyed.)
[c] a. This chemical reaction destroys matter.
[c] b. Matter is consumed by the flame.
[c] c. The mass of ash is less than the match it came from.
[c*] d. The atoms are not destroyed, they are only rearranged.
[c] e. The match weighs less after burning.
[!!!] ————— 9 ————- [/!!!]
[q] Heat is given off when hydrogen burns in air according to the equation

2H2 + O2 → 2H2O

Which of the following is responsible for the heat?
[c] a. Breaking hydrogen bonds gives off energy.
[c] b. Breaking oxygen bonds gives off energy.
[c*] c. Forming hydrogen-oxygen bonds gives off energy.
[c] d. Both (a) and (b) are responsible.
[c] e. (a), (b), and (c) are responsible.
[!!!] ————— 10 ————- [/!!!]
[q] Two ice cubes are floating in water:

After the ice melts, will the water level be:
[c] a. higher?
[c] b. lower?
[c*] c. the same?
[!!!] ————— 11 ————- [/!!!]
[q] What is the reason for your answer to the previous question?
(Two ice cubes are floating in water. After the ice melts, will the water level be…)
[c*] a. The weight of the water displaced is equal to the weight of the ice.
[c] b. Water is more dense in its solid form (ice).
[c] c. Water molecules displace more volume than ice molecules.
[c] d. The water from the ice melting changes the water level.
[c] e. When ice melts, its molecules expand.

[!!!] ————— 12 ————- [/!!!]
[q] A 1.0-gram sample of solid iodine is placed in a tube and the tube is sealed after all of the air is removed. The tube and the solid iodine together weigh 27.0 grams.

The tube is then heated until all of the iodine evaporates and the tube is filled with iodine gas. Will the weight after heating be:
[c] a. less than 26.0 grams.
[c] b. 26.0 grams.
[c*] c. 27.0 grams.
[c] d. 28.0 grams.
[c] e. more than 28.0 grams.

[!!!] ————— 13 ————- [/!!!]
[q] What is the reason for your answer to the previous question?

(A 1.0-gram sample of solid iodine is placed in a tube and the tube is sealed after all of the air is removed. The tube and the solid iodine together weigh 27.0 grams.

The tube is then heated until all of the iodine evaporates and the tube is filled with iodine gas. The weight after heating is…)
[c] a. A gas weighs less than a solid.⋅
[c*] b. Mass is conserved.
[c] c. Iodine gas is less dense than solid iodine.
[c] d. Gases rise.
[c] e. Iodine gas is lighter than air.

[!!!] ————— 14 ————- [/!!!]
[q] What is the approximate number of carbon atoms it would take placed next to each other to make a line that would cross this dot? ⋅
[c] a. 4
[c] b. 200
[c*] c. 30,000,000
[c] d. 6.02 x 1023

[!!!] ————— 15 ————- [/!!!]
[q] Figure 1 represents a 1.0 L solution of sugar dissolved in water. The dots in the magnification circle represent the sugar molecules. In order to simplify the diagram, the water molecules have not been shown.

Which response represents the view after 1.0 L of water was added (Figure 2).

[c] a. [c*] b. [c] c. [c] d. [c] e.

 

[!!!] ————— 16 ————- [/!!!]
[q] 100 mL of water at 25°C and 100 mL of alcohol at 25°C are both heated at the same rate under identical conditions. After 3 minutes the temperature of the alcohol is 50°C. Two minutes later the temperature of the water is 50°C. Which liquid received more heat as it warmed to 50°C?
[c*] a. The water.
[c] b. The alcohol.
[c] c. Both received the same amount of heat.
[c] d. It is impossible to tell from the information given.

[!!!] ————— 17 ————- [/!!!]
[q] What is the reason for your answer to the previous question?
(100 mL of water at 25°C and 100 mL of alcohol at 25°C are both heated at the same rate under identical conditions. After 3 minutes the temperature of the alcohol is 50°C. Two minutes later the temperature of the water is 50°C. Which liquid received more heat as it warmed to 50°C?)
[c] a. Water has a higher boiling point then the alcohol.
[c*] b. Water takes longer to change its temperature than the alcohol.
[c] c. Both increased their temperatures 25°C.
[c] d. Alcohol has a lower density and vapor pressure.
[c] e. Alcohol has a higher specific heat so it heats faster.

[!!!] ————— 18 ————- [/!!!]
[q] Iron combines with oxygen and water from the air to form rust. If an iron nail were allowed to rust completely, one should find that the rust weighs:
[c] a. less than the nail it came from.
[c] b. the same as the nail it came from.
[c*] c. more than the nail it came from.
[c] d. It is impossible to predict.

[!!!] ————— 19 ————- [/!!!]
[q] What is the reason for your answer to the previous question?
(Iron combines with oxygen and water from the air to form rust. If an iron nail were allowed to rust completely, one should find that the rust weighs…)
[c] a. Rusting makes the nail lighter.
[c*] b. Rust contains iron and oxygen.
[c] c. The nail flakes away.
[c] d. The iron from the nail is destroyed.
[c] e. The flaky rust weighs less than iron.

[!!!] ————— 20 ————- [/!!!]
[q] Salt is added to water and the mixture is stirred until no more salt dissolves. The salt that does not dissolve is allowed to settle out. What happens to the concentration of salt in solution if water evaporates until the volume of the solution is half the original volume? (Assume temperature remains constant.)

The concentration
[c] a. increases.
[c] b. decreases.
[c*] c. stays the same.

[!!!] ————— 21 ————- [/!!!]
[q] What is the reason for your answer to the previous question?
(Salt is added to water and the mixture is stirred until no more salt dissolves. The salt that does not dissolve is allowed to settle out. What happens to the concentration of salt in solution if water evaporates until the volume of the solution is half the original volume?)
[c] a. There is the same amount of salt in less water.
[c*] b. More solid salt forms.
[c] c. Salt does not evaporate and is left in solution.
[c] d. There is less water.
[!!!] ————— 22 ————- [/!!!]
[q] Following is a list of properties of a sample of solid sulfur:

i. Brittle, crystalline solid.
ii. Melting point of 113oC.
iii. Density of 2.1 g/cm3.
iv. Combines with oxygen to form sulfur dioxide

Which, if any, of these properties would be the same for one single atom of sulfur obtained from the sample?
[c] a. i and ii only.
[c] b. iii and iv only.
[c*] c. iv only.
[c] d. All of these properties would be the same.
[c] e. None of these properties would be the same.

[/qwiz]

An article from the Journal of Chemical Education describing the development of the test and results is here.