16 Questions
Which of the following cells are anucleate?
Mammalian erythrocytes
Which process occurs within the nucleus?
DNA replication
What stains the nucleus purple?
Hematoxylin
During which process is gene sequence copied into mRNA within the nucleus?
Transcription
Which structure separates the contents of the nucleus from the cytoplasm?
Nuclear envelope
What is the function of nuclear lamina?
Provide structural support and serve as linkers between the nuclear envelope and chromatin fibers
What is the composition of nuclear lamina?
Lamins
What is the role of nuclear pores in the nucleus?
Regulate the transport of molecules into and out of the nucleus
What is the approximate diameter of the water-filled cylindrical channel in the nuclear pore complex?
9nm
What is the function of nuclear pore complexes (NPC)?
Allow the regulated exchange of molecules
What is the total number of pore complexes in a typical nucleus?
3000-4000
What kind of molecules can freely enter the nucleus through the nuclear pores?
Molecules of about 5000 daltons
What is the approximate number of pore complexes per µm2 in the nucleus of an oocyte?
50 million
Which proteins are found in the nuclear pore complex?
Nucleoporins
What is the role of nucleoporins in the nuclear pore complex?
Form the structure of the pore complex and enable regulated exchange of molecules
What is the function of the nuclear lamina in relation to chromatin fibers?
Serve as linkers between the nuclear envelope and chromatin fibers
Test your knowledge of medical biology with this quiz on the nucleus, nuclear envelope, and nuclear pore. Learn about exceptional anucleate cells and their limitations. Perfect for students and professionals in the medical field.
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