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Cell Biology: The Nucleus

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Questions and Answers

What is the primary function of the nucleus?

To store genetic information and regulate gene expression (correct)
To maintain cellular structure and shape
To generate energy for the cell
To synthesize proteins

What is the typical percentage of cell volume occupied by the nucleus?

20%
30%
10% (correct)
5%

What is the term for the ratio of the size of the nucleus to the size of the cytoplasm?

Cytoplasmic index
Nuclear-to-cytoplasmic ratio (correct)
Cellular density
Nuclear volume fraction

What type of chromatin is more condensed and less accessible to gene expression machinery?

Heterochromatin (D) Signup and view all the answers

In which type of cells is the nucleus often found in a peripheral position?

Adipocytes and skeletal muscle cells (A) Signup and view all the answers

What is the approximate diameter of the nucleus in human cells?

6 µm (C) Signup and view all the answers

What is the purpose of the nuclear envelope?

To distinguish the cytoplasm from the nucleus (B) Signup and view all the answers

Which of the following is a characteristic of the nucleus in animal cells?

It is the largest organelle in the cell (D) Signup and view all the answers

What is the significance of the nuclear-cytoplasmic ratio?

It is an indicator of cell malignancy (C) Signup and view all the answers

What is the function of euchromatin regions?

To regulate gene expression (D) Signup and view all the answers

Which of the following is a characteristic of the nucleus in some epithelial cells?

It is basally located in the cell (A) Signup and view all the answers

What is the shape of the nucleus in some cells?

Multilobed or flattened (A) Signup and view all the answers

Which of the following cells can have multiple nuclei?

Some eukaryotic cells (C) Signup and view all the answers

What is the location of the nucleus in adipocytes?

Peripheral (D) Signup and view all the answers

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