Which of the following is a function of the nucleus?

a. stores DNA
b. stores sugars
c. builds proteins
d. packages proteins

Stores DNA

The correct answer is a. stores DNA.

To answer this question, we need to understand the basic functions of the nucleus. Let's break down the options:

a. stores DNA - This is a correct function of the nucleus. The nucleus contains the cell's genetic material, which is in the form of DNA (deoxyribonucleic acid). The DNA contains the instructions for making proteins and other important molecules in the cell.

b. stores sugars - This is an incorrect option. The storage of sugars primarily occurs in other parts of the cell, such as the cytoplasm or specialized structures called vacuoles.

c. builds proteins - This is an incorrect option. The process of building proteins is primarily carried out by ribosomes, which are either located on the rough endoplasmic reticulum or floating freely in the cytoplasm.

d. packages proteins - This is an incorrect option. The packaging of proteins mainly happens in the Golgi apparatus, a separate cellular structure.

So, based on the given options, the correct answer is a. stores DNA.

The correct answer is a. stores DNA.