Which of the following statements are correct? 1. The DNA Technology (Use and Application) Regulation Bill, 2019 provides for the regulation of use of DNA technology for establishing the identity of certain persons. 2. DNA is made up of 26 pairs of chromosomes and provides instructions for building an entire organism and proteins. 3. DNA is composed of two chains, which coil around each other to form a double helix carrying the genetic instructions used in the growth. 4. Under the Bill, DNA profiling is allowed only in respect of criminal matters. Select the correct answer using the code given below: Correct Answer Only 1 and 3 The correct answer is Only 1 and 3. Key Points The DNA Technology (Use And Application) Regulation Bill, 2019 was introduced in the Lok Sabha. The bill which is also known as the DNA profiling bill tries to check the use of DNA technology to establish the identity of a person. Hence 1 statement is correct. According to the government, the DNA technology bill aims to establish the identity of missing persons, victims, offenders, under trials, and unknown deceased persons. Hence 4 statement is incorrect. Under the Bill, DNA testing is allowed only in respect of matters listed in the Schedule to the Bill. These include offenses under the Indian Penal Code, 1860, and civil matters such as paternity suits. Additional Information Deoxyribonucleic acid, commonly known as DNA, is the hereditary complex molecule present in humans and almost all other organisms. Most DNA molecules consist of two biopolymer strands coiled around each other to form a double helix. Hence 3 statement is correct. The two strands are called polynucleotides since they are composed of simpler monomeric units called nucleotides. It is a polymer of nucleotides that is made up of ribose sugar, a phosphate, and bases such as adenine (A), guanine (G), cytosine (C), and uracil (U). Humans have 23 pairs of chromosomes. 22 pairs of autosomes chromosomes and one pair of sex chromosomes, X and Y. Hence 2 statement is incorrect.