Select the INCORRECT statement.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Chromosomes are composed of DNA and carbohydrates.
The incorrect statement is: 'Chromosomes are composed of DNA and carbohydrates.' This is inaccurate because chromosomes are made up of DNA and proteins, primarily histones, not carbohydrates. Histone proteins help in tightly packaging the long DNA strands into a compact, organized structure called chromatin, which further condenses to form chromosomes during cell division. The other statements are correct: functional segments of DNA are indeed called genes, chromatin material condenses into rod-shaped chromosomes before cell division, and DNA carries the genetic instructions necessary for constructing and organizing cells. Therefore, the only false statement among the options is the one mentioning carbohydrates.