DNA Extraction Warm Up 2
Welcome to the electronic biology classroom of the 21st Century. This warm-up or bell ringer will test your background knowledge using the Wheat/Human DNA Extraction Experiment, karyotype Lessons, and karyotype Studies. You are permitted to have any of those documents out during the warm-up activity. This warm up permits you an unlimited number of attempts to increase learning and test-taking skills. As a bonus, each attempt randomly generates new questions and answers.
- 1.
After performing various DNA extraction experiments. Which sample produced a high yield of DNA?
- A.
Animal (non-human)
- B.
Human
- C.
Plant
- D.
Bacteria
- E.
Fungus
Correct Answer
C. PlantExplanation
The plant sample likely produced a high yield of DNA because plants typically have larger cells and more DNA compared to other organisms such as animals, humans, bacteria, and fungi. Additionally, plants often have higher amounts of secondary metabolites and protective compounds that can inhibit DNA extraction, so if a high yield was obtained from the plant sample, it suggests that the extraction method used was effective in breaking down these compounds and releasing the DNA.Rate this question:
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- 2.
After step 7 on the wheat/human DNA extraction experiment. If you prepared a microscope slide of your DNA strains. You would be able to observe the actual DNA molecule at 400X.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
After step 7 of the wheat/human DNA extraction experiment, preparing a microscope slide of the DNA strains would not allow you to observe the actual DNA molecule at 400X. This is because the DNA molecules are extremely small and cannot be directly seen under a light microscope at that magnification. To observe the actual DNA molecule, a more powerful microscope such as an electron microscope would be required. Therefore, the statement is false.Rate this question:
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- 3.
Which chemical did you use during the Extract and Observe DNA experiment caused the cell wall of the wheat germ to break down?
- A.
Warm water
- B.
Cold Alcohol
- C.
Salt Solution
- D.
Detergent
- E.
Hot Salt Solution
Correct Answer
D. DetergentExplanation
Detergent is used during the Extract and Observe DNA experiment to break down the cell wall of the wheat germ. Detergents are capable of breaking down lipids and proteins, which are components of the cell wall. This allows for the release of DNA from the cells, making it accessible for further experimentation and observation.Rate this question:
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- 4.
Which chemical did you use during the Extract and Observe DNA experiment caused the DNA of the human epithial and wheat germ DNA to condense?
- A.
Warm water
- B.
Cold Alcohol
- C.
Salt Solution
- D.
Detergent
- E.
Hot Salt Solution
Correct Answer
B. Cold AlcoholExplanation
Cold alcohol was used during the Extract and Observe DNA experiment to cause the DNA of the human epithelial and wheat germ DNA to condense.Rate this question:
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- 5.
What color were the human epithelial cells before undergoing the centrifuge?
- A.
Red
- B.
White
- C.
Yellow
- D.
Clear
Correct Answer
D. ClearExplanation
Before undergoing the centrifuge, human epithelial cells do not have any specific color. They are transparent or clear in appearance. The centrifuge is a process used to separate different components of a mixture based on their density, not their color. Therefore, the color of the cells before the centrifuge is not relevant to the process.Rate this question:
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- 6.
Extract and Observe DNA experiment; if you had toasted the wheat germ in the microwave oven in the experiment. You will have produced more volume of DNA.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Toasting the wheat germ in the microwave oven in the Extract and Observe DNA experiment would not result in producing more volume of DNA. The volume of DNA obtained in this experiment is determined by the extraction process and not by toasting the wheat germ. Toasting the wheat germ might affect the quality or integrity of the DNA, but it would not increase the volume of DNA obtained. Therefore, the statement is false.Rate this question:
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- 7.
If you performed this experiment on bananas and onions instead of the wheat germ. You would have produced no DNA molecules.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
If you performed the experiment on bananas and onions instead of wheat germ, it is unlikely that you would produce no DNA molecules. This is because all living organisms, including bananas and onions, contain DNA. While the DNA extraction process may vary slightly depending on the source, it is still possible to extract DNA from these organisms. Therefore, the statement is false.Rate this question:
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- 8.
When you gargle the saline solution to extract the human epithelial cells from your cheeks. Which type of osmosis did you create?
- A.
Hypotonic solution
- B.
Isotonic solution
- C.
Hypertonic solution
- D.
Active Diffusion
- E.
Passive Diffusion
Correct Answer
C. Hypertonic solutionExplanation
When you gargle the saline solution to extract the human epithelial cells from your cheeks, you create a hypertonic solution. This is because the saline solution has a higher concentration of solutes compared to the inside of the cheek cells. As a result, water molecules will move out of the cells through osmosis, causing the cells to shrink and detach from the cheeks.Rate this question:
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- 9.
Individuals with trisomy - 16 displays no effects and will may live a normal and healthy life from the extra copy of chromosome 16.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Individuals with trisomy 16, a condition where there is an extra copy of chromosome 16, do not typically live a normal and healthy life. Trisomy 16 is associated with various developmental and health issues, such as intellectual disability, growth delays, heart defects, and other abnormalities. It is often incompatible with life, and many affected individuals do not survive past infancy. Therefore, the statement that individuals with trisomy 16 may live a normal and healthy life is false.Rate this question:
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- 10.
Food coloring is added to detergent and saline solution in the DNA extraction experiment of human cheek cells.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Food coloring is not added to detergent and saline solution in the DNA extraction experiment of human cheek cells. The purpose of adding detergent is to break down the cell membrane and release the DNA, while saline solution is used to create an isotonic environment for the cells. Food coloring is not necessary for this experiment and is not typically used. Therefore, the answer is false.Rate this question:
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- 11.
_____is used to precipitate the DNA. Because DNA is soluble in water, _____causes the DNA to precipitate and come out of the solution. DNA will rise into the _____ layer. (Please note all three blanks are the same answer.)
- A.
Alcohol
- B.
Dawn Detergent
- C.
Salt solution
- D.
Water
Correct Answer
A. AlcoholExplanation
Alcohol is used to precipitate the DNA. Because DNA is soluble in water, alcohol causes the DNA to precipitate and come out of the solution. DNA will rise into the alcohol layer.Rate this question:
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- 12.
Strawberries are octoploid, which means they have _____ sets of chromosomes.
- A.
Two
- B.
Four
- C.
Six
- D.
Eight
- E.
Ten
Correct Answer
D. EightExplanation
Strawberries are octoploid, meaning they have eight sets of chromosomes. This indicates that the cells of strawberries contain eight complete copies of their genetic material.Rate this question:
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- 13.
What color are the strands of DNA within the pink solution of strawberry juice?
- A.
Pink
- B.
Red
- C.
White
- D.
Clear
- E.
Green
Correct Answer
C. WhiteExplanation
The strands of DNA within the pink solution of strawberry juice are white. This is because DNA is a colorless molecule and cannot be seen with the naked eye. The pink color of the solution is due to other pigments present in the strawberry juice, such as anthocyanins.Rate this question:
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- 14.
What chemical compound (see image) is added to the 200 mL of gargle water?
- A.
Dish soap
- B.
Alcohol
- C.
Salt
- D.
Food coloring
- E.
Water
Correct Answer
C. SaltExplanation
Salt is added to the 200 mL of gargle water.Rate this question:
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- 15.
The NOVA video presentation displayed DNA in which form(s)?
- A.
String (only)
- B.
Clumps (only)
- C.
Clumps + string
- D.
Entire layer
Correct Answer
C. Clumps + stringExplanation
The NOVA video presentation displayed DNA in the form of both clumps and strings. This suggests that the DNA was shown in its natural state, where it can exist as both tightly packed clumps and elongated strings. The combination of clumps and strings allows for a better understanding of the structure and organization of DNA.Rate this question:
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- 16.
The detergent and salt solution is used to break down the ___ and _____ that make up the cell membrane.
- A.
Oils and fats
- B.
Fats and proteins
- C.
Proteins and sugars
- D.
Sugars and fats
- E.
Oils and sugars
Correct Answer
B. Fats and proteinsExplanation
The cell membrane is composed of a phospholipid bilayer, which consists of two layers of phospholipids. Phospholipids have a hydrophilic (water-loving) head and a hydrophobic (water-repelling) tail. The hydrophobic tails of the phospholipids are made up of fats, while the hydrophilic heads are made up of proteins. The detergent and salt solution is used to break down the fats and proteins in the cell membrane, allowing for the breakdown of the membrane itself.Rate this question:
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Current Version
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Mar 18, 2023Quiz Edited by
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Mar 29, 2012Quiz Created by
John Mitchell