Tag: bio-chemistry

Questions Related to bio-chemistry

The smallest measuring unit of cytology is

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. Nanometre, nm.

  2. Angstrom, A$^o$.

  3. Micrometre, $\mu$m.

  4. Micron $\mu$.

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Correct Option: A

Angstrom ($A{^o}$) is equal to

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. $0.01\mu$m.

  2. $0.001\mu$m.

  3. $0.0001\mu$m.

  4. $0.00001\mu$m.

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Correct Option: C

$1$m$\mu$ (millimicron) is equal to

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. $10^{-5}$mm.

  2. $10^{-6}$mm.

  3. $10^{-7}$mm.

  4. $10^{-8}$mm.

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Correct Option: B

Which of the following statements is false?

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. Electrophoresis can help separate proteins.

  2. Image formed by compound microscope is vertical and erect.

  3. An angstrom is one-hundredth of a micron.

  4. Unstained living cells can be studied with the help of a phase-contrast microscope.

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Correct Option: C

Angstrom is equal to

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. $10^{-10}$m.

  2. $10^{-12}$m.

  3. $10^{-6}$m.

  4. $10^{-3}$m.

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Correct Option: A

What is the unit for measuring the size of a cell?

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. nm

  2. mm

  3. $\overset{o}{A}$

  4. $\mu$m

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Correct Option: D

A nanogram is equivalent to

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. $10^{-9}$g.

  2. $10^{-9}$mg.

  3. $10^9$mg.

  4. $10^9$g.

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Correct Option: A

Which one combination of eye piece and objective would have widest field

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. 5 X, 5 X

  2. 5 X, 10 X

  3. 10 X, 45 X

  4. 10 X, 100 X

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Correct Option: A
Explanation:

The objective with a low number will have the widest field.

So, the correct option is '5 X, 5 X'.

Bacteria cell divides once in every two min and it takes 1 hr to fill half the cup. How much time it will take to fill the cup ? 
Tell me the correct answer with explanation ____________.

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. A-58 min

  2. B-62 min

  3. C-120 min

  4. D-59 min

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Correct Option: D
Explanation:
It is given that the doubling time of the given bacteria is 1 minute. It means the generation time of given bacterial cells is 60 seconds. If it takes 60 minutes to fill a cup, it will take 59 minutes to fill half the cup.
At 59th minute, the cup will be half-filled and in the 60th minute, the bacterial cell will double up and cup will be full filled.
Thus, the correct answer is '59 min.'

In condensed state of mitochondria

bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

  1. ATP Synthesis is reduced

  2. Oxidative phosphorylation and ETS occurs at faster rate

  3. Intermembrane space becomes smaller

  4. Core or matrix is enlarged

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Correct Option: B
Explanation:

One of the two morphological forms of a mitochondrion is 'condensed' form observed in mitochondria with high respiratory rates (ATP formation is high with increased rates of Kreb's cycle, ETS, and oxidative phosphorylation). In this type of confirmation, the matrix volume inside inner membrane is not very large causing the inner membrane to move away from outer membrane causing the intermembrane space to swell except at the site of where two are connected. Thus considering all the details about this form of the mitochondrion.

The correct answer is 'Oxidative phosphorylation and ETS occur at a faster rate'.