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
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 |
87%
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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Assertion(A): Endoplasmic reticulum (ER), golgi complex, lysosomes and vacuoles are grouped together as endomembrane system.
Reason(R): The functions of endoplasmic reticulum (ER), golgi complex, lysosomes and Vacuoles are coordinated.
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 functions of endoplasmic reticulum (ER), golgi complex, lysosomes and Vacuoles are coordinated.
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 |
92%
From NCERT
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Assertion(A): The concentration of ions is significantly higher in the cytoplasm than in the vacuole.
Reason(R): The tonoplast facilitates the transport of a number of ions actively into the vacuole.
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 tonoplast facilitates the transport of a number of ions actively into the vacuole.
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: Vacuole |
67%
From NCERT
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Assertion(A): Mitochondria are called ‘power houses’ of the cell.
Reason(R): They produce cellular energy in the form of ATP.
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): They produce cellular energy in the form of ATP.
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: Mitochondria |
97%
From NCERT
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Assertion(A): Cells vary in their shape, size and functions based on the presence or absence of a membrane bound nucleus and other organelles.
Reason(R): A typical eukaryotic cell consists of a cell membrane, nucleus and 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): A typical eukaryotic cell consists of a cell membrane, nucleus and 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: Introduction to Cell |
58%
From NCERT
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Assertion (A): Mitochondria, ER are largest organelle in an animal’s cell.
Reason (R): Mitochondria, Chloroplast are semiautonomous cell organelles.
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.
Reason (R): Mitochondria, Chloroplast are semiautonomous cell organelles.
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: Plastids | Mitochondria | Endomembrane System (Endoplasmic Reticulum) |
77%
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