Questions and Answers
Chambers A and B are placed next to each other, but are separated by a film similar to a cell membrane. Chamber A contains 80% carbon dioxide and Chamber B contains 20% carbon dioxide. Which of the following will occur? (Select all that apply)
In simple diffusion, molecules move from an area of ____ concentration to an area of ____ concentration.
What is the boiling point of water on the Celsius temperature scale?
100 C
What is the freezing point of water on the Celsius temperature scale?
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The liter is the metric base unit of measurement for what?
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What is the freezing point of water on the Fahrenheit temperature scale?
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The lens on the microscope that is primarily responsible for the magnification of the specimen is the _____ lens.
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Which of the image quality factors is usually expressed in a number such as 40x?
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You have successfully focused on an object with the 10x and 40x objective lenses. You have rotated the 100x objective lens into position but are unable to obtain a sharp image by rotating the fine focus adjustment knob. Which of the following is most likely to correct this problem?
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A change in what component of microscopy influences the apparent size of the objects being viewed?
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The objective lenses of the compound light microscope are attached to the _____
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Using oil immersion is useful because
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The total magnification of an image is determined by ______ the magnification power of the ocular lens and the magnification power of the objective lens used.
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The _______ lenses further magnify the image produced by the objective lens.
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Which part of the microscope will be used first to adjust the focus when starting with the lowest power lens?
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The fine adjustment knob on the microscope
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Which of the following molecules is produced in the oxidation of NADH during fermentation?
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Which of the following processes will occur in the presence or absence of oxygen?
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In the yeast fermentation experiment, what is being produced to cause the air bubble at the top of the tube to increase over time?
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Which of the following substrates is fermented most easily by yeast?
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A device that can be used to measure the rate of exchange of oxygen and carbon dioxide during energy-acquiring pathways is called a
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During the experiment measuring energy production in plants, the highest rate of cellular respiration occurred in
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During the soybean experiment, the nongerminating soybeans consumed around 0.02 mL/min of oxygen. What does this tell you about the cellular respiration of the nongerminating soybeans?
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Study Notes
Gas Diffusion and Concentration
- Chambers A and B separated by a membrane with 80% CO2 in A and 20% CO2 in B.
- Some carbon dioxide will move from chamber B to chamber A due to concentration gradient.
Simple Diffusion
- In simple diffusion, molecules move from high concentration to low concentration.
Boiling and Freezing Points of Water
- Boiling point of water is 100°C.
- Freezing point of water is 0°C.
Measurement Units
- The liter is the metric base unit for measuring volume.
Freezing Points in Fahrenheit
- Freezing point of water is 32°F.
Microscopy Fundamentals
- The objective lens is responsible for magnification in microscopy.
- Image quality is often expressed in magnification (e.g., 40x).
Focusing Techniques
- Inability to obtain a sharp image with the 100x objective lens may be corrected by applying immersion oil.
- Total magnification is calculated by multiplying the magnification powers of ocular and objective lenses.
- Coarse focus is used first when adjusting focus with the lowest power lens.
Oil Immersion Benefits
- Oil immersion increases the resolving power of the specimen.
Additional Lens Functions
- Ocular lenses further magnify the image produced by the objective lens.
- Fine adjustment knob fine-tunes the focus of the microscope.
Fermentation and Metabolism
- Lactate is produced in the oxidation of NADH during fermentation.
- Glycolysis occurs in the presence or absence of oxygen.
Yeast Fermentation Experiment
- Carbon dioxide (CO2) production causes air bubbles to increase in the fermentation tube.
- Glucose is the substrate that is most easily fermented by yeast.
Measuring Respiration
- A respirometer measures the exchange rate of oxygen and carbon dioxide in energy-acquiring pathways.
- Highest rate of cellular respiration observed in tubes with germinating seeds.
Cellular Respiration Observations
- Non-germinating soybeans consumed approximately 0.02 mL/min of oxygen, indicating a minimal level of cellular respiration.
Studying That Suits You
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Description
Test your understanding of gas exchange principles in cellular environments with these flashcards. The quiz covers various scenarios involving carbon dioxide movement between chambers separated by a membrane. Perfect for biology students needing a quick review.
