Tag: cell membrane

Quizzes (6) Questions (56)

Questions Related to cell membrane

Multiple choice bio-chemistry lipids derived lipids biomolecules: chemical constituents of living cells cell membrane

CPPP which is the important component of sterol is mainly stood for?

  1. Cyclopentanoperhydrophenanthrene

  2. Pentanoperhydrophenanthrene

  3. Cycloperhydrophenanthrene

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

CPPP is the abbreviated form of Cyclopentanoperhydrophenanthrene. It is an important component of sterol. Thus the correct answer is option A.

Multiple choice bio-chemistry lipids derived lipids biomolecules: chemical constituents of living cells cell membrane

Steroids are

  1. Tetraterpenes

  2. Polyterpenes

  3. Triterpenes and their derivative

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

Steroids are hormonal substances in animals, but they are components of membranes in most organisms. Triterpenes are precursors to steroids in both plants and animals. Steroids are derivatives of triterpenes with 26 or more carbon atoms that have undergone a characteristic type of rearrangement. So, the correct answer is option C.

Multiple choice bio-chemistry lipids derived lipids biomolecules: chemical constituents of living cells cell membrane

Two important processes in a cell, which take place outside the membrane bound organelles, are

  1. Enzyme synthesis and DNA replication

  2. Nucleotide synthesis and mutation

  3. Fatty acid synthesis and spindle assembly

  4. Glycolysis and photophosphorylation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The process of fatty acid synthesis takes place in the cytoplasm and not in a membrane-bound organelle. Also, spindle assembly takes place in the centrioles which also lack a membrane.

So, the correct answer is 'fatty acid synthesis and spindle assembly'.
Multiple choice bio-chemistry cell membrane active transport and passive transport types of plant transport atp

When a molecule moves across a membrane independent of other molecules, the process is called (i) Uniport (ii) Symport (iii) Antiport?

  1. i

  2. i and ii

  3. i and iii

  4. ii and iii

  5. iii
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When a molecule moves across a membrane independent of other molecule, it is called uniport.

When two molecules move simultaneously across the membrane in the same direction, it is called symport.
When two molecules move in opposite direction to each other across the membrane, it is called antiport. Thus, the correct answer is A.

Multiple choice bio-chemistry cell membrane active transport and passive transport types of plant transport atp

When a molecule moves across a membrane independent of other molecules, the process is called

  1. Uniport

  2. Symport

  3. Antiport

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A uniporter is an integral membrane protein that transports a single type of substrate species (charged or uncharged) across a cell membrane. It may use either facilitated diffusion and transport along a diffusion gradient or transport against one with an active transport process. They can be either ion channels or carrier proteins. In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers.

So the correct option is 'None of the above'