Identify the correct statements:
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 only2.Only I, II and III
3.Only III and IV4.I, II, III and IV

Subtopic: Ā Introduction to Cell |
Ā 78%
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

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
 
Subtopic: Ā Cytoskeleton |Ā Centrosomes |Ā 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

 
Subtopic: Ā 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:
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: Ā Plastids |Ā Mitochondria |Ā Golgi Apparatus |Ā Ribosome and Inclusion Bodies |
Ā 80%
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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
 
Subtopic: Ā Intro to Endomembrane System: Endoplasmic Reticulum |
Ā 72%
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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
 
Subtopic: Ā 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
 
Subtopic: Ā Prokaryotic Cell Organisation |Ā Details of Prokaryotic Cell Structure |
Ā 73%
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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
 
Subtopic: Ā 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: Ā Eukaryotic Cell Architecture: Types |Ā Eukaryotic Cell Orgenelle |
Ā 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: Ā Prokaryotic Cell Organisation |Ā Details of Prokaryotic Cell Structure |
Ā 73%
From NCERT
NEET - 2013
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