Polysome is formed by

1. several ribosomes attached to a single mRNA

2. many ribosomes attached to a strand of endoplasmic reticulum

3. a ribosome with several subunits 

4. ribosomes attached to each other in a linear arrangement

DNA is not present in:

Which one of the following is not an inclusion body found in prokaryotes?

1. Phosphate granule

2. Cyanophycean granule

3. Glycogen granule

4. Polysome

Which of the following are not membrane-bound?

1. Vacuoles

2. Ribosomes

3. Lysosomes

4. Mesosomes

What is true about ribosomes?

1. The prokaryotic ribosomes are 80 S, where S stands for sedimentation coefficient

2. These are composed of ribonucleic acid and proteins

3. These are found only in eukaryotic cells

4. These are self-splicing introns of some RNAs

Peptide synthesis inside a cell takes place in

1. mitochondria

2. chromoplast

3. ribosomes

4. chloroplast

Inclusion bodies of blue-green, purple, and green photosynthetic bacteria are:

1. Contractile vacuoles

2. Gas vacuoles

3. Centrioles

4. Microtubules

Eukaryotic cells contain

1.  70 'S' ribosomes 

2.  70 'S' and 80 'S' ribosome

3.  80 'S' ribosomes

4.  70 'S' and 60 'S' ribosomes

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