NEET BIOLOGY

Detailed explanation-1: -DNA is the hereditary material in humans and almost all other organisms. The DNA fragments have Phosphate ions which are negatively charged due to additional electrons and due to that, the whole DNA fragment is imparted a negative charge. So, the correct answer is, “Negatively charged.”

Detailed explanation-2: -DNA is negatively charged, therefore, when an electric current is applied to the gel, DNA will migrate towards the positively charged electrode. Shorter strands of DNA move more quickly through the gel than longer strands resulting in the fragments being arranged in order of size.

Detailed explanation-3: -DNA is negatively charged because of the presence of phosphate groups in nucleotides. The phosphate backbone of DNA is negatively charged, which is due to the presence of bonds created between the phosphorus and oxygen atoms.

Detailed explanation-4: -Due to the negatively charged phosphate group, the DNA fragment also has the same negative charge.

Detailed explanation-5: -Through the process of protein synthesis, DNA regulates the metabolic processes of the cell. Hence, DNA is negatively charged and not positively charged.