Question

cell explorer: the animal cell
the nucleus
why is the nucleus important?
a. it is useful for making cell energy.
b. it contains and protects the cell’s dna.
c. it is the site of protein synthesis.
d. both a and c

Explanation:

• Option A: Making cell energy is the role of mitochondria, not the nucleus.
• Option B: The nucleus is the organelle that stores, organizes, and protects the cell's genetic material (DNA), which is its core function.
• Option C: Protein synthesis occurs at ribosomes, not the nucleus.
• Option D: Since A and C are incorrect, this is not valid.

Answer:

B. It contains and protects the cell's DNA.