Choose incorrect statement regarding cells

1. Mycoplasma, the smallest cell, is only 0.3 μm in length while bacteria could be 3 to 5 μm
2. Hemoglobin associated human cells are about 7μm in diameter
3. The shape of the cell may not vary with the function they perform
4. Nerve cells are longest cells

Subtopic:  Introduction to Cell |
 84%
From NCERT
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Which of the following cell organelle is closely associated with ER & helps in formation of plasma membrane during cytokinesis?

1.  Centrosome

2.  Sphaerosomes

3.  Golgi bodies

4.  Ribosomes 

Subtopic:  Golgi Apparatus |
 74%
From NCERT
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The ability of proteins to move laterally within the overall bilayer lipid molecules of plasma membrane is measured as its

1.  Stability

2.  Thickness

3.  Degree of permeability

4.  Fluidity 

Subtopic:  Cell Membrane |
 90%
From NCERT
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Neutral solutes directly pass through the lipid bilayer of plasma membrane because

1. Plasma membrane has special carrier for them

2. They are lipid soluble

3. They have specific hydrophilic areas for their passage

4. They consume ATP 

Subtopic:  Cell Membrane |
 65%
From NCERT
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Find the incorrect statement

1.  Middle lamella is mainly made up of calcium and magnesium pectate

2.  Cell wall is formed on the inner side of the cell therefore secondary wall formed first

3.  Middle lamella glues the neighbouring cells together

4.  Cell wall helps in cell to cell interaction and provides barrier to undesirable macromolecules 

Subtopic:  Cell Wall |
 78%
From NCERT
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According to fluid mosaic model of plasma membrane the quasifluid nature of

1.  Protein enables lateral movement of lipids within in the overall bilayer

2.  Lipid and protein enable the lateral movement of carbohydrates

3.  Lipid enables lateral movement of proteins within the overall bilayer

4.  Lipid enables the flip-flop movement of proteins 

Subtopic:  Cell Membrane |
 68%
From NCERT
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Cell theory formulated by Schleiden and Schwann does not explain which one of the following features?

1.  Organisms are composed of cells and their products

2.  All cells are basically alike in their structure and metabolism

3.  New cells originate from pre-existing cells 

4.  The function of an organism is an outcome of activities and interactions of its constituent cells

Subtopic:  Cell Theory |
 77%
From NCERT
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Cilia and flagella resemble in the 

1.  Microtubular structure

2.  Presence of basal granules

3.  Mode of action

4.  More than one option is correct 

Subtopic:  Cilia & Flagella |
 75%
From NCERT
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The outer as well as inner membrane of mitochondria 

1. Form a number of infoldings towards the matrix

2. Both have a similar amount of  cardiolipin

3. Have more lipids than proteins

4. Have their own specific enzymes

Subtopic:  Mitochondria |
 68%
From NCERT
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Select the incorrect statement with respect to Golgi apparatus 

1.  The cis and trans faces of the organelle are similar but interconnected

2.  The Golgi cisternae are concentrically arranged near the nucleus

3.  It remains in close association with the endoplasmic reticulum

4.  The ER vesicles fuse with the cis face 

Subtopic:  Golgi Apparatus |
 80%
From NCERT
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