DNA in eukaryotic cells is contained in the

Analyze the question: The question asks where DNA is found in eukaryotic cells. Eukaryotes are cells with a true, membrane-bound nucleus, such as plant, animal, fungal and protist cells.

Explain the concept: DNA (deoxyribonucleic acid) carries the genetic information of the cell. In eukaryotes, most of it is organised into chromosomes and enclosed inside the nucleus by the nuclear envelope. (A small amount is also found in mitochondria and chloroplasts, but those aren't among the options.)

Go through the options:

• A. Central vacuole: This stores water, salts and other substances and helps keep the cell firm (turgid). It holds no DNA.
• B. Nucleus: This contains the chromosomes (DNA and proteins) and controls the cell's activities. Correct.
• C. Lysosome: This contains digestive enzymes that break down waste materials and worn-out organelles. It holds no DNA.
• D. Golgi body: This modifies, packages and secretes proteins and other substances. It holds no DNA.

Answer: The DNA is contained in the nucleus, which is option B.

Exam tip: Remember "Eu = true": eukaryotes have a true nucleus. Whenever JAMB asks where DNA or chromosomes are located in a eukaryotic cell, think nucleus first. In prokaryotes (such as bacteria), DNA floats freely in the cytoplasm in a region called the nucleoid.