Textbook Question
Mark the following statements about the cytoskeleton as true or false. If a statement is false, correct it to make a true statement.
Centrioles are part of the centrosome from which microtubules originate.
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2. Cell Chemistry & Cell Components
Introduction to Eukaryotic Organelles
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Which statement correctly describes the nuclear envelope of a eukaryotic cell?
A
It is a rigid structure that prevents any material from entering or leaving the nucleus.
B
It is a single membrane that surrounds the nucleus.
C
It is composed of a single lipid bilayer with embedded ribosomes.
D
It consists of two lipid bilayers with nuclear pores.
Verified step by step guidance1
Understand the structure of the nuclear envelope: The nuclear envelope is a double membrane structure that surrounds the nucleus in eukaryotic cells.
Recognize the composition: Each membrane of the nuclear envelope is a lipid bilayer, similar to other cellular membranes.
Identify the function of nuclear pores: The nuclear envelope contains nuclear pores, which are complex structures that allow the transport of molecules between the nucleus and the cytoplasm.
Clarify the incorrect statements: The nuclear envelope is not a rigid structure; it allows selective transport through nuclear pores. It is not a single membrane, nor does it have embedded ribosomes.
Conclude with the correct description: The nuclear envelope consists of two lipid bilayers with nuclear pores, facilitating communication between the nucleus and the rest of the cell.
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