According to the widely accepted "fluid mosaic model", cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect:
 

1.	Proteins can also undergo flip-flop movements in the lipid bilayer
2.	Many proteins remain completely embedded within the lipid bilayer
3.	Proteins in cell membranes can travel within the lipid bilayer
4.	Proteins can remain confined within certain domains of the membrane

The main organelle involved in the modification and routing of newly synthesized proteins to their destinations is -

1. Endoplasmic Reticulum

2. Lysosome

3. Mitochondria

4. Chloroplast 

Chlorophyll in chloroplasts is located in:

1. Grana

2. Pyrenoid

3. Stroma

4. Both (1) and (3)

Role of microtubules is:
1.  To help in cell division
2.  Cell membrane formation
3.  Respiration
4.  Pinocytosis

Difference between eukaryotes and prokaryotes is in:
1.  Circular ss DNA in prokaryotes
2.  Histone with prokaryotic DNA
3.  Operon in eukaryotes
4.  Membrane bound organelles in eukaryotes

Flagella of prokaryotic and eukaryotic cells differ in:

In chloroplasts, chlorophyll is present in the:
1. Inner membrane
2. Thylakoids
3. Stroma
4. Outer membrane

Double unit membrane is absent in:
1.  Ribosomes
2.  Nucleus
3.  Plastids
4.  E.R

In the fluid mosaic model of a plasma membrane:
 

Ribosomes are produced in:
1. Nucleolus
2. Cytoplasm
3. Mitochondria
4. Golgibody