Chapter 165 of 2363 min read
Mitochondria, plastids, ribosomes, cytoskeleton, nucleus
Why this is asked: Mitochondria and plastids are the two organelles carrying their own circular DNA and their own 70S ribosomes — the same size class as a bacterial ribosome, not the 80S kind on the rest of the eukaryotic cell's machinery — which is exactly the evidence the endosymbiotic theory is built on.
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- •From the statements given below choose the correct option: A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S. B. Each ribosome has two sub-units. C. The two sub-units of the 80S ribosome are 60S and 40S while those of the 70S are 50S and 30S. D. The two sub-units of the 80S ribosome are 60S and 20S and those of the 70S are 50S and 20S. E. The two sub-units of the 80S are 60S and 30S and those of the 70S are 50S and 30S.
- •Match List I with List II.
Choose the correct answer from the options given below:List I List II A. Centromere I. Mitochondrion B. Cilium II. Cell division C. Cristae III. Cell movement D. Cell membrane IV. Phospholipid bilayer - •The DNA present in the chloroplast is:
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