Biology - Mock Test 258

Question 2571

Spherical or tubular membranes which separate the material present in endoplasmic reticulum from that of cytoplasmic material are called?

A) Cytosol B) Cisternae C) Polysomes D) Cristae

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Question 2572

Strengthening material of prokaryotic cell wall is?

A) Cellulose B) Chitin C) Inorganic salts silica waxes and ligin D) Peptidoglycan or Murein.

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Question 2573

Cellulose is the major component of?

A) Primary wall B) Secondary wall C) Middle lamella D) all of the above

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Question 2574

The first layer of cell wall which is formed is?

A) Primary wall B) Secondary wall C) Middle lamella D) All of these

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Question 2575

Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called?

A) Active transport B) Passive transport C) Co-transport D) Counter transport

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Question 2576

Percentage of proteins in cell membrane is?

A) 20-40% B) 40-50% C) 60-80% D) 80-100%

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Question 2577

In cell fractionation various components of cells including its organelles can be isolated in different layers depending upon?

A) Their physical properties like size & weight. B) Physical properties of the medium like its density. C) Their electrical properties like their charges D) Both a and b

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Question 2578

Magnifying power of electron microscope as compared to eye is?

A) 500 X B) 250000X C) 500000X D) 250X

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Question 2579

Resolution power of a compound microscope is?

A) 2.0 ?m B) 2-4 A C) 24 ?m D) 24 A

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Question 2580

Who first observed and thus hypothesized that new cells are formed from previously existing living cell?

A) Theodor Schwann and Schleiden B) Rudolph Virchows C) Louis Pasteur D) Both b and c

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