If the pH in lysosomes is increased to alkaline, what will be the outcome?
1.
Hydrolytic enzymes will function more efficiently
2.
Hydrolytic enzymes will become inactive
3.
Lysosomal enzymes will be released into the cytoplasm
4.
Lysosomal enzymes will be more active
Subtopic: Lysosomes |
82%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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Read the following statements and choose the option which is true for them.
Statement-I: Telocentric chromosomes have no centromere.
Statement-II: The satellite chromosomes have secondary constriction.
1. Only statement-I is correct
2. Only statement-II is correct
3. Both statements are correct
4. Both statements are incorrect
Statement-I: Telocentric chromosomes have no centromere.
Statement-II: The satellite chromosomes have secondary constriction.
1. Only statement-I is correct
2. Only statement-II is correct
3. Both statements are correct
4. Both statements are incorrect
Subtopic: Nucleus |
79%
From NCERT
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Identify the correct statements:
1. I and II only
2. Only I, II and III
3. Only III and IV
4. I, II, III and IV
| I: | Robert Hooke first used the word cell to name the microscopic honeycomb cavities in cork. |
| II: | Anton Von Leeuwenhoek first saw and described a living cell. |
| III: | Robert Brown discovered the nucleus. |
| IV: | George Palade first observed centrosomes in animal cells. |
1. I and II only
2. Only I, II and III
3. Only III and IV
4. I, II, III and IV
Subtopic: Introduction to Cell |
79%
From NCERT
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NEET 2025 - Target Batch
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The type of mictotubule arrangement shown in the given diagram can be present in:
I. Centriole
II. Cilia/flagella
III. Basal body
1. Only II
2. Only I
3. Both I and II
4. Both I and III
I. Centriole
II. Cilia/flagella
III. Basal body
1. Only II
2. Only I
3. Both I and II
4. Both I and III
Subtopic: Cytoskeleton | Centrosomes | Cilia & Flagella |
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Consider the following statements:
I. Secondary constrictions are found at variable locations in few chromosomes.
II. Acrocentric chromosome has a terminal centromere.
III. Chromosomes are visible only in dividing cells.
IV. All chromosomes have a shorter ‘p’ arm and a longer ‘q’ arm.
V. Human cell has about two meters of DNA located on each of the twenty three homologous pairs of chromosomes.
VI. Kinetochore is made up of spindle and is present around the secondary constriction.
VII. Secondary constrictions are most easily stained portions of a chromosome.
The number of correct statements is:
1. 0
2. 1
3. 2
4. 3
I. Secondary constrictions are found at variable locations in few chromosomes.
II. Acrocentric chromosome has a terminal centromere.
III. Chromosomes are visible only in dividing cells.
IV. All chromosomes have a shorter ‘p’ arm and a longer ‘q’ arm.
V. Human cell has about two meters of DNA located on each of the twenty three homologous pairs of chromosomes.
VI. Kinetochore is made up of spindle and is present around the secondary constriction.
VII. Secondary constrictions are most easily stained portions of a chromosome.
The number of correct statements is:
1. 0
2. 1
3. 2
4. 3
Subtopic: Nucleus: Chromosomes |
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A | Chloroplasts | P | Oxidative Phosphorylation |
| B | Mitochondria | Q | Photophosphorylation |
| C | Golgi Apparatus | R | Synthesis of glycoproteins and glycolipids |
| D | Ribosomes | S | Peptide synthesis |
Codes:
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | P | R | S |
| 3. | Q | P | S | R |
| 4. | P | Q | S | R |
Subtopic: Plastids | Mitochondria | Golgi Apparatus | Ribosome and Inclusion Bodies |
81%
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What will be true for endoplasmic reticulum?
I. They are not included in the endomembrane system.
II. Rough ER is the major site for synthesis of lipids.
III. They are not bound by a membrane
1. Only II
2. Only I
3. Both I and III
4. None
I. They are not included in the endomembrane system.
II. Rough ER is the major site for synthesis of lipids.
III. They are not bound by a membrane
1. Only II
2. Only I
3. Both I and III
4. None
Subtopic: Intro to Endomembrane System: Endoplasmic Reticulum |
74%
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In a plasma membrane of a typical animal cell:
I. The major lipids are phospholipids
II. Peripheral proteins are only partially buried in the membrane
III. Lateral movement of lipids in protein bilayer is measured as its fluidity
1. Only I is correct
2. Only III is correct
3. Only II and III are correct
4. Only I and III are correct
I. The major lipids are phospholipids
II. Peripheral proteins are only partially buried in the membrane
III. Lateral movement of lipids in protein bilayer is measured as its fluidity
1. Only I is correct
2. Only III is correct
3. Only II and III are correct
4. Only I and III are correct
Subtopic: Cell Membrane |
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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
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 |
77%
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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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