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Q. No.Given below are two statements:
Assertion (A):
It is important that the organisms should have cells.
Reason (R):
A cell keeps its chemical composition steady within its boundary.
1.
Both (A) and (R) are true and (R) is the correct explanation of (A).
2.
Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.
(A) is true but (R) is false.
4.
Both (A) and (R) are false.
Subtopic: Introduction to Cell |
Level 3: 35%-60%
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Mesosomes in a bacterial cell:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | are formed by the extensions of plasma membrane into the cell. |
| II: | help in cell wall formation, DNA replication and distribution to daughter cells. |
| III: | contain pigments in cyanobacteria. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Prokaryotic Cell Organisation | Details of Prokaryotic Cell Structure |
63%
Level 2: 60%+
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In eukaryotic cells, the term "nuclear envelope" is more correct than the term "nuclear membrane" for the enclosure around nucleus because:
| 1. | the enclosure has pores which membranes do not |
| 2. | the enclosure is made up of two membranes |
| 3. | the chemical composition is inconsistent with cellular membranes |
| 4. | the enclosure does not enclose the nucleolus |
Subtopic: Nucleus |
Level 3: 35%-60%
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In the following diagrams, each shows a section of the cell surface membrane to illustrate the fluid mosaic model. Which diagram is the most accurate?
(The black shape represents cholesterol, and the gray shape represents protein.)
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Evidence for Fluidic Nature of Membrane |
61%
Level 2: 60%+
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Which type of substances would face difficulty in passing through the cell membrane?
| 1. | Substances with hydrophobic moiety |
| 2. | Substances with hydrophilic moiety |
| 3. | All substances, irrespective of hydrophobic and hydrophilic moiety |
| 4. | Substances which are soluble in lipids |
Subtopic: Cell Membrane |
55%
Level 3: 35%-60%
NEET - 2022
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Which of the following statement(s) is/are not correct regarding lysosomes?
Choose the correct answer from the options given below:
| A. | The hydrolytic enzymes of lysosomes are active under alkaline pH |
| B. | Lysosomes are membrane-bound structures |
| C. | Lysosomes are formed by the process of packaging in the endoplasmic reticulum |
| D. | Lysosomes have numerous hydrolytic enzymes |
| 1. | A only | 2. | B, D Only |
| 3. | A, D Only | 4. | A, C Only |
Subtopic: Lysosomes |
62%
Level 2: 60%+
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Consider the given two statements:
| Statement I: | In 1838, Matthias Schleiden, a German botanist, examined a large number of plants and observed that the presence of cell wall is a unique character of the plant cells. |
| Statement II: | In 1839, Theodor Schwann, a British Zoologist, studied different types of animal cells and reported that cells had a thin outer layer which is today known as the ‘plasma membrane’. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Cell Theory |
Level 4: Below 35%
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Read carefully: Select the location with respect to a eukaryotic cell where ribosomes are not expected to be found?
| 1. | in the cytoplasm |
| 2. | within the chloroplasts (in plants) |
| 3. | within the mitochondria |
| 4. | within the rough ER. |
Subtopic: Eukaryotic Cell Orgenelle |
Level 3: 35%-60%
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Regarding the genetic material in prokaryotes:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The main chromosomal DNA is linear |
| II: | Plasmid DNA is circular |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Details of Prokaryotic Cell Structure |
67%
Level 2: 60%+
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Consider the two statements:
| Statement I: | Besides flagella, Pili and Fimbriae are also surface structures of the bacteria but do not play a role in motility. |
| Statement II: | Pili and fimbriae help attach the bacteria to rocks in streams and also to the host tissues. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Details of Prokaryotic Cell Structure |
Level 3: 35%-60%
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