The common organelle present in both eukaryotes and prokaryotes is

1. Vacuole

2. cell membrane

3. ribosome

4. centrosome

Which of the following is the characteristic of  prokaryotes

(1)mesosome

(2)naked DNA

(3)plasmid

(4)All of the above

Arrange the following in the increasing of their size

(1)virus< PPLO< typical bacteria< typical eukaryotic cell

(2) PPLO< virus< typical bacteria< typical eukaryotic cell

(3) virus< PPLO< typical eukaryotic cell< typical bacteria

(4) virus> PPLO> typical bacteria> typical eukaryotic cell

The detailed structure of the cell membrane was studied only after the advent of the

(1)compound microscope

(2)cryo-electron microscopy

(3)X-ray crystallography

(4)electron microscope

The lipid component of the membrane mainly consists of

(1)phosphoglycerides

(2)triglycerides

(3)monoglycerides

(4)Both B and C

In membranes, the lipids are arranged within the membrane with the ______heads towards the outer sides and the _________ tails towards the inner part.

(1)polar, charged

(2)polar, hydrophobic

(3)polar, nonpolar

(4)Both B and C

Which of the following biomolecules is not the part of membrane?

(1)Nucleic Acid

(2)Proteins

(3)Lipids

(4)Carbohydrates

Which one is true for the cell membrane

(1)The ratio of lipids and proteins is fixed in membranes

(2)The amount of carbohydrates is greater than other biomolecules

(3)In human erythrocytes amount of protein is more than that of lipids

(4)All of the above

Integral or Peripheral proteins classification is based on

The most improved model of the structure of the cell membrane is

(1)Fluid membrane model

(2)Fluid mosaic model

(3)Sandwich model

(4)unit membrane model