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Ribosomes are essential for protein synt...

Ribosomes are essential for protein synthesis, but they are present in mitochondria and plastids, the sites of respiration and photosynthesis. What is the role of ribosomes in these organelles?

A

Ribosomes transport ATP formed in respiration and photosynthesis to cytoplasm through ER

B

Subunits of some required proteins are synthesised in these organelles

C

Ribosomes transport RNA and DNA to cytoplasm

D

All of these

Text Solution

Verified by Experts

The correct Answer is:
B
Ribosomes are found inside the chloroplast and mitochondria, besides nucleus. It is mainly, these organelles are semiautonomous, i.e., some of the proteins that are utilised for organelle functioning are synthesised in these organelles as well as in nucleus, e.g. large subunit of RuBisCO is synthesised in chloroplast while small in nucleus.
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  2. Cellular organelles with membranes are

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  3. Ribosomes are essential for protein synthesis, but they are present in...

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  4. Which one of the following is correct for transmembrane proteins in li...

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  5. What kind of microscopy uses acridine orange?

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  6. In order to ssediment free ribosomes, centrifugation required is

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  7. The following is generally used for creating density gradient during c...

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  8. The technique separates proteins according to their molecular weight.

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  9. At what speed, the mitochondria can be separated out by differential c...

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  10. Which of the following is always absent in prokaryotic cells?

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  11. The primary cell wall is mainly made up of

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  12. Match the following columns

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  13. Which structures perform the function of mitochondria in bacteria ?

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  14. Which of these organelles does not contain ribosomes I. Rough endopl...

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  15. A major site for synthesis of lipids is

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  16. The solid linear cytoskeletal elements having a diameter of 6 nm and m...

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  17. The osmotic expansion of cell kept in water is chiefly regulated by :

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  18. The Golgi complex plays a major role

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  19. Who gave the term 'plasmalemma'?

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  20. The difference between rough endoplasmic reticulum and smooth endoplas...

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