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Q. No.Rudolf Virchow modified Schleiden and Schwann’s cell theory by adding a crucial principle. What key addition did he make?
1.
Cells arise spontaneously from non-living matter.
2.
Cells are only composed of non-cellular products.
3.
Cells can be created artificially under laboratory conditions.
4.
All cells arise from pre-existing cells.
Subtopic: Cell Theory |
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Integral and peripheral proteins differ in their placement in the membrane. Why can integral proteins not be easily extracted from the membrane?
| 1. | They are partially or completely embedded in the membrane. |
| 2. | They are loosely attached to the lipid bilayer. |
| 3. | They form ionic bonds with membrane lipids. |
| 4. | They are attached only to carbohydrate chains. |
Subtopic: Cell Membrane |
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The number of mitochondria per cell varies depending on the cell’s metabolic activity. What could be inferred about a cell with an unusually high number of mitochondria?
| 1. | It is likely engaged in high energy-demanding processes. |
| 2. | It relies primarily on glycolysis for energy production. |
| 3. | It has a decreased rate of oxidative phosphorylation. |
| 4. | It is undergoing rapid mitotic division. |
Subtopic: Mitochondria |
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Which of the following are cell surface structure in a typical prokaryotic cell but do not play a role in motility?
I: Flagella
II: Pili
III: Fimbriae
1. Only I and II
2. Only II and III
3. Only I and III
4. I, II and III
I: Flagella
II: Pili
III: Fimbriae
1. Only I and II
2. Only II and III
3. Only I and III
4. I, II and III
Subtopic: Prokaryotic Cell Organisation |
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Identify the organelle, the function of which is not coordinated with the other three given organelles:
1. Endoplasmic reticulum
2. Mitochondria
3. Golgi apparatus
4. Lysosomes
1. Endoplasmic reticulum
2. Mitochondria
3. Golgi apparatus
4. Lysosomes
Subtopic: Endomembrane System |
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What is tonoplast?
1. The membrane surrounding the vacuole
2. A type of plastid involved in pigment synthesis
3. The double membrane of the nucleus
4. The outer membrane of the chloroplast
1. The membrane surrounding the vacuole
2. A type of plastid involved in pigment synthesis
3. The double membrane of the nucleus
4. The outer membrane of the chloroplast
Subtopic: Vacuole |
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Prokaryotic ribosomes:
| 1. | are 70 S with smaller 30 S subunit and larger 50 S subunit |
| 2. | are 70 S with smaller 30 S subunit and larger 40 S subunit |
| 3. | are 80 S with smaller 30 S subunit and larger 50 S subunit |
| 4. | are 80 S with smaller 40 S subunit and larger 60 S subunit |
Subtopic: Details of Prokaryotic Cell Structure |
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The cell membrane is primarily composed of lipids and proteins. The major lipids are phospholipids, arranged in a bilayer. Regarding the structure and arrangement of lipids in the membrane:
| 1. | Phospholipids are arranged with the hydrophobic heads facing the outer side and the polar tails facing the inner part. |
| 2. | Phospholipids are arranged in a bilayer with polar heads towards the outer side and hydrophobic tails towards the inner part. |
| 3. | The membrane contains only saturated hydrocarbons. |
| 4. | Cholesterol is absent from the membrane structure. |
Subtopic: Cell Membrane |
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Bacteria contain all of the following EXCEPT:
| 1. | membrane bound organelles |
| 2. | double stranded DNA |
| 3. | ribosomes |
| 4. | circular DNA |
Subtopic: Introduction to Cell | Details of Prokaryotic Cell Structure |
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Which of the following structures are found in prokaryotes?
I. A cell wall containing peptidoglycan.
II. A plasma membrane lacking cholesterol.
III. Ribosomes
1. I only
2. II only
3. I and II only
4. I, II and III
I. A cell wall containing peptidoglycan.
II. A plasma membrane lacking cholesterol.
III. Ribosomes
1. I only
2. II only
3. I and II only
4. I, II and III
Subtopic: Introduction to Cell | Prokaryotic Cell Organisation | Details of Prokaryotic Cell Structure |
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