Chromosomes are found in the

Step 1: Analyze the question The question asks where chromosomes are located in a cell.

Step 2: Explain the concept Chromosomes are thread-like structures made of DNA and proteins (histones). They carry genes, the units of heredity. In eukaryotic cells (plants and animals), the main DNA is organised into chromosomes and kept inside the nucleus, which is surrounded by a nuclear envelope. During cell division, the chromosomes condense and become visible under a microscope.

Step 3: Check each option

• A. Cell membrane: This controls what enters and leaves the cell. It does not hold chromosomes.
• B. Centriole: This helps form the spindle fibres during animal cell division. It does not contain chromosomes.
• C. Mitochondrion: This is the site of respiration. It has a small amount of its own DNA, but the chromosomes of the cell are not found there.
• D. Nucleus: This is the control centre of the cell and contains the chromosomes. ✔
• E. Lysosome: This contains digestive enzymes. It has no chromosomes.

Step 4: Answer The correct answer is D. nucleus.

Tip: Remember "Nucleus = Not just a Core, it's the Library of genes." Chromosomes, DNA and genes all live in the nucleus. If a question asks where genetic information is stored in a eukaryotic cell, think nucleus first.