Tag: bio-chemistry

Quizzes (82) Questions (1918)

Questions Related to bio-chemistry

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

Which of the following statements is false?

  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.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An angstrom is 10^-10 meters, while a micron is 10^-6 meters. Therefore, an angstrom is 10^-4 of a micron, not one-hundredth. The other statements are standard biological/microscopy facts.

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

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 ____________.

  1. A-58 min

  2. B-62 min

  3. C-120 min

  4. D-59 min
Reveal answer Fill a bubble to check yourself
D Correct answer
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.'
Multiple choice bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

In condensed state of mitochondria

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.