Which of the given options is rod-shaped, carries genetic information, is visible only at cell division and is present in the nucleus?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. Chromosomes.
The structure described is a chromosome. Chromosomes are rod-shaped structures found in the nucleus of eukaryotic cells. They carry genetic information in the form of DNA, which is tightly coiled and organised with the help of proteins called histones. Chromosomes become visible under a microscope primarily during cell division (mitosis or meiosis), when the chromatin condenses into distinct, rod-like forms. They play a crucial role in inheritance, ensuring that genetic information is accurately transmitted from one generation to the next. In non-dividing cells, they exist as a less visible, uncoiled form called chromatin.