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NEET

Explore popular questions from Cell Structure and Function for NEET. This collection covers Cell Structure and Function previous year NEET questions hand picked by experienced teachers.

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Physics

Chemistry

Biology

Cell Structure and Function

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Q 1. The part of a cell that can be seen with and electron microscope, but can’t with a light microscope is/are the -

A

nucleus

B

Golgi bodies

C

chloroplasts

membrane separating the nucleus from the cytoplasm

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Q 2. The organic compound present in traces in living cells can be detected and isolated by -

A

centrifugation

B

tracer technique

chromatography

D

microscopy

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Q 3. Which techique used for separation of immunoglobulins, cellular enzymes and m-RNA?

A

Ion exchange chromatography

Affinity chromatography

C

Paper chromatography

D

None of these

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Q 4. Electron microscope was invented by-

Knoll and Ruska

B

Rudolph and Kolliker

C

C.P. Swanson

D

None of the above

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Q 5. Phase contrast microscope is -

A

based on the scattering of light and using a dark field condenser

used for the study of living cells

C

related to retardation and thickness of object

D

the best method for studying non-living ultra structure.

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Q 6. The smallest size of a cell which can be seen with unaided eye is -

A

1 micron

B

10 micron

100 micron

D

1000 micron

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Q 7. Fuelgen reaction of DNA is due to -

aldehyde produced by acid hydrolysis

B

removal of RNA but not DNA

C

phosphoric acid carbohydrated and nitrogen based

D

phosporic acid

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Q 8. The resolving power of an electron microscope is -

A

0.000005 nm

B

0.0000005 {tex}\mu{/tex} n

C

2 {tex}\mu{/tex} n

0.025 Å

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Q 9. Which cell organelle is detected with the help of sudan black :-

A

Peroxisome

B

Glyoxysome

Sphaerosome

D

Rough E.R.

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Q 10. Magnification power of a light compound microscope depends on :-

A

Power of eye piece lens

B

Power of objective lens

C

Source of light

1 and 2 both

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Q 11. Feulgen reaction is used to stain :-

DNA

B

RNA-polymerase

C

DNA-polymerase

D

A and C both

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Q 12. Microsomes are obtained by -

A

Vital staining

B

Sonography

Fractionation of cell by ultrasonic sound waves

D

X-ray crystallography

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Q 13. Which dye is used to stain chromosomes:-

A

Acetocarmine

B

Haematoxylin

C

Feulgen

All the above

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Q 14. Toludene blue specifically stains :-

A

DNA

RNA

C

Chitin

D

Lignin

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Q 15. Which stain is used for electron microscopy-

A

PAS

B

Aurantia

C

Para Rosailin

Osmium tetraoxide

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Q 16. Which stain is commonly used in study of cell division :-

A

Feulgen reaction

Acetocarmine

C

Eosine

D

Saffranine

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Q 17. Which of the following are nuclear stains :-

A

Aceto Carmine

B

Haematoxylene

C

Saffranine

1 and 2 both

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Q 18. Cell organelles can be separated by method of :-

A

Autoradiogrphy

B

Microtomy

Differential centrifugation

D

X-ray diffraction

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Q 19. Structure of RNA can be studied by :-

A

Feulgen

B

Toluene blue

X-ray crystallography

D

Chromatography

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Q 20. Chlor-zinc iodide (schultz solution) stains :-

Cellulose

B

Protein

C

Chitin

D

Lipid

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Q 21. Light compound microscope with 15 x eye piece lense and 45 x objective lens will have a magnification of -

A

2000

675

C

1000

D

500

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Q 22. In light compound microscope the power of oil immersion lens is :-

A

10 X

B

20 X

C

45 X

100 X

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Q 23. A __________is a biocatalyst that increases the rate of the reaction without being changed.

A

Aluminum oxide

B

Silicon dioxide

Enzyme

D

Hydrogen peroxide

Explanation

Among these options, an enzyme is an only option which is a biocatalyst that catalyzes the chemical reaction without being changed while all other options are of the catalyst which increases or decrease the rate of reaction based on their concentration.

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Q 24. Enzyme increases the rate of reaction by _________ the activation energy.

lowering

B

increasing

C

keeping same

D

none of these

Explanation

Activation energy is the difference in free energy between the reactants and transition state. To complete a reaction, enzyme lowers the activation energy and crosses the transition state.

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Q 25. What is the nature of an enzyme?

A

Vitamin

B

Lipid

C

Carbohydrate

Protein

Explanation

All enzymes are protein except Catalytic RNA molecule. The native protein conformation of an enzyme defines its catalytic activity. Once the enzyme is denatured, its catalytic activity is also lost.