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Q. No.Most prokaryotic cells, particularly the bacterial cells, have a chemically complex cell envelope, where:
1. the outermost layer is the cell wall
2. all three layers act together as a single protective unit
3. the cell membrane staining properties make some bacteria Gram positive
4. carbohydrate is the biomolecule absent in all three layers
Subtopic: Prokaryotic Cell Organisation | Details of Prokaryotic Cell Structure |
74%
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Which layer of the plant cell wall will be outer-most [away from membrane]?
1. Glycocalyx
2. Middle lamella
3. Primary cell wall
4. Secondary cell wall
1. Glycocalyx
2. Middle lamella
3. Primary cell wall
4. Secondary cell wall
Subtopic: Cell Wall |
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Select the alternative giving correct identification and function of the organelle 'A' in the diagram:
| 1. | Mitochondria - produce cellular energy in the form of ATP |
| 2. | Golgi body - provides packaging material |
| 3. | Lysosomes - secrete hydrolytic enzymes |
| 4. | Endoplasmic reticulum - synthesis of lipids |
Subtopic: Eukaryotic Cell Architecture: Types | Eukaryotic Cell Orgenelle |
94%
From NCERT
NEET - 2013
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The term 'glycocalyx' is used for:
| 1. | a layer present between cell wall and membrane of bacteria |
| 2. | cell wall of bacteria |
| 3. | bacterial cell glyco-engineered to possess N-glycosylated proteins |
| 4. | a layer surrounding the cell wall of bacteria |
Subtopic: Prokaryotic Cell Organisation | Details of Prokaryotic Cell Structure |
73%
From NCERT
NEET - 2013
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Gram staining differentiates bacteria into Gram Positive and Gram negative by the chemical and physical properties of their:
1. 70 S ribosomes
2. Cell membrane
3. Cell wall
4. Chloroplasts
1. 70 S ribosomes
2. Cell membrane
3. Cell wall
4. Chloroplasts
Subtopic: Bacterial Staining & Shape |
67%
From NCERT
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Which layer, consisting of calcium pectate, is the first formed after cytokinesis in a plant cell?
1. The primary cell wall
2. The middle lamella
3. The secondary cell wall
4. Plasmodesmata
1. The primary cell wall
2. The middle lamella
3. The secondary cell wall
4. Plasmodesmata
Subtopic: Cell Wall |
84%
From NCERT
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Which of the following observations cannot be credited to Schleiden and Schwann?
1. All plants are composed of different kinds of cells which form the tissues of the plant.
2. Animal cells have a thin outer layer which is today known as ‘plasma membrane’.
3. Cells divide and new cells are formed from pre-existing cells.
4. The presence of cell wall is a unique character of the plant cells.
1. All plants are composed of different kinds of cells which form the tissues of the plant.
2. Animal cells have a thin outer layer which is today known as ‘plasma membrane’.
3. Cells divide and new cells are formed from pre-existing cells.
4. The presence of cell wall is a unique character of the plant cells.
Subtopic: Cell Theory |
86%
From NCERT
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Identify the correct statement:
I. Both the cilium and flagellum emerge from centriole-like structure called the centrosome.
II: Centrosome is an organelle usually containing two cylindrical structures called centrioles.
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
I. Both the cilium and flagellum emerge from centriole-like structure called the centrosome.
II: Centrosome is an organelle usually containing two cylindrical structures called centrioles.
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Centrosomes | Cilia & Flagella |
52%
From NCERT
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Assertion(A): Cell is the fundamental structural and functional unit of all living organisms.
Reason(R): Anything less than a complete structure of a cell does not ensure independent living.
Choices for Assertions and reasons:
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. (A) is false, but (R) is true.
Reason(R): Anything less than a complete structure of a cell does not ensure independent living.
Choices for Assertions and reasons:
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. (A) is false, but (R) is true.
Subtopic: Introduction to Cell |
89%
From NCERT
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Assertion(A): ER divides the intracellular space into two distinct compartments, i.e., luminal (inside ER) and extra luminal (cytoplasm) compartments.
Reason(R): The network of ER is scattered in the cytoplasm.
Choices for Assertions and reasons:
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. (A) is false, but (R) is true.
Reason(R): The network of ER is scattered in the cytoplasm.
Choices for Assertions and reasons:
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. (A) is false, but (R) is true.
Subtopic: Endomembrane System (Endoplasmic Reticulum) |
55%
From NCERT
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