Ribosomes are the nonmembranous, smallest organelle of the cell. They are present in both prokaryotes and eukaryotes except mature sperm and RBCs. In prokaryotes, they scattered in the cytoplasm called Cytoribosome and in eukaryotes they are present freely in the cytoplasm or are attached with ER. They are also present in the plastids and mitochondria and are named as Plastidribosome and Mitoribosome respectively. Each ribosome has two-part, the smaller one is caplike and larger one is dome-shaped. They are the site of protein synthesis. They provide the site for the attachment of mRNA and tRNA and give them protection from cytoplasmic nucleases. So, take this quiz check that how much you know about ribosome.
1. Who discovered ribosome?
A. Miller
B. Porter
C. Morgan
D. George Emil Palade
2. When many ribosome are attached with the same mRNA, the complex formed is called ......
A. Polysome
B. Polyribosome
C. Both of them
D. None of them
3. The 70s ribosome has two subunits as.....
A. 35s + 35s
B. 50s + 30s
C. 30s + 40s
D. 60s + 40s
4. 70s ribosome found in .....
A. Bacteria
B. Choloroplast
C. Mitochondria
D. All of the above
5. Palade granules are.....
A. Ribosome
B. Pigment granules
C. Excretory vesicles
D. RER
6. If ribosomes are destroyed then _______ synthesis of the cell is blocked.
A. Peroxisome
B. Glyoxysome
C. Ribosome
D. Lysosome
7. Which of the following is enzyme rich organelle?
A. Nucleus
B. Lysosome
C. Mitochondria
D. Ribosome
8. Ribosome contain which of the following enzyme?
A. Peptide isomerase
B. Peptidyl transferease
C. Aminoacyl synthetase
D. Aminoacyl transferase
9. The prime location of attachment of ribosome with ER in eukaryotes is ....
A. 60s unit of ribosome
B. 40s unit of ribosome
C. Between 60s and 40s units
D. Between 50s and 30s units
10. The ribosome is often called ....
A. Micosome
B. RNA particle
C. Dictyosome
D. Oxisome
11. Which microscope has revealed the presence of ribosomes?
A. Compound Microscope
B. Stereo Microscope
C. Electron Microscope
D. Confocal Microscope
12. The basophilic ergastoplasm in gland cells indicate the richness of ......
A. Mitochondria
B. Centriole
C. Nucleus
D. Ribosome
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