CELL STRUCTURES AND FUNCTION
CELL STRUCTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -The nucleolus is a round body located inside the nucleus of a eukaryotic cell. It is not surrounded by a membrane but sits in the nucleus.
Detailed explanation-2: -The nucleolus is located inside the nucleus of the eukaryotic cell. It is surrounded by a membrane inside the nucleus.
Detailed explanation-3: -The nucleolus, which is not surrounded by a membrane, is organized around the chromosomal regions that contain the genes for the 5.8S, 18S, and 28S rRNAs. Eukaryotic ribosomes contain four types of RNA, designated the 5S, 5.8S, 18S, and 28S rRNAs (see Figure 7.4).
Detailed explanation-4: -Nuclear Membrane The nuclear membrane is a double layer that encloses the cell’s nucleus, where the chromosomes reside. The nuclear membrane serves to separate the chromosomes from the cell’s cytoplasm and other contents.
Detailed explanation-5: -The nucleus is surrounded by a system of two concentric membranes, called the inner and outer nuclear membranes. The outer nuclear membrane is continuous with the endoplasmic reticulum, so the space between the inner and outer nuclear membranes is directly connected with the lumen of the endoplasmic reticulum.