A common characteristic feature of plant sieve tube cells and most mammalian erythrocytes is

1. absence of mitochondria

2. presence of cell wall

3. presence of haemoglobin

4. absence of nucleus

Select which one is not true for ribosome

1. Made up of two sub-units

2. Form polysome

3. May attach to mRNA

4. Have no role in protein synthesis

Which one of these is not a eukaryote?

1.  Euglena

2.  Anabaena

3.  Spirogyra

4.  Agaricus

Which of the following stain is not used for staining chromosomes?

1.  Basic fuchsin

2.  Safranin

3.  Methylene blue

4.  Carmine

Different cells have different sizes. Given are the following cells:
I. Mycoplasma 
II. Ostrich eggs
III. Human RBC
IV. Bacteria
The correct ascending order of their size of the cells given above will be : 
1.  I, IV, III, II   
2.  I, I, IIL, IV
3.  II, I, III, IV 
4.  III, II, I, IV

Which of the following features is common to prokaryotes and many eukaryotes?

1.  Chromatin material present

2.  Cell wall present

3.  Nuclear membrane present

4.  Membrane bound sub-cellular organelles present

Who proposed the fluid mosaic model of plasma membrane?

1.  Camillo Golgi

2.  Schleiden and Schwann

3.  Singer and Nicolson

4.  Robert Brown

Which of the following statement is true for a secretory cell?

What is a tonoplast?

1.  outer membrane of mitochondria 

2.  inner membrane of mitochondria

3.  membrane boundary of the vacuole of plant cell

4.  cell membrane of plant cell

Which of the following is not true of a eukaryotic cell?