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Which one of the cell organelles is not enclosed by any membrane?
Options
(a) lysosome
(b) ribosome
(c) mitochondria
(d) plastid
Correct Answer:
ribosome
Explanation:
Ribosomes are naked ribonucleoprotein protoplasmic particles which function as the site for protein synthesis. Therefore they are popularly known as protein factories. Ribosomes are produced in nucleolus and occur on nuclear membrane & RER. It is also present in cytoplasm in prokaryotes and eukaryotes. Chemically ribosome is made up of rRNA (60%) protein (40%). As ribosomes, nucleolus and centrioles are also membrane less cell organelles.
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Topics: Cell Structure and Functions
(413)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Best type of pyramid which is always true is
- Filiform apparatus is characteristic of
- Thorn of Bougainvillea and tendril of cucurbita are example of
- Flavr savr variety of Tomato is
- A single strand of nucleic acid tagged with a radioactive molecule is called :
Topics: Cell Structure and Functions (413)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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