LIFE SCIENCE

Detailed explanation-1: -DNA (or deoxyribonucleic acid) is a long molecule that contains our unique genetic code. Like a recipe book, it holds the instructions for making all the proteins in our bodies.

Detailed explanation-2: -The sequence of bases in DNA can be thought of as the “letters” that provide the basis for the genetic code for all of the proteins synthesized by our bodies, and these, in turn, provide the basis for the structure of all of our cells, all of our enzymes, and all of our inherited traits and characteristics.

Detailed explanation-3: -Transcription begins when an enzyme called RNA polymerase attaches to the DNA template strand and begins assembling a new chain of nucleotides to produce a complementary RNA strand.

Detailed explanation-4: -Only about 1 percent of DNA is made up of protein-coding genes; the other 99 percent is noncoding. Noncoding DNA does not provide instructions for making proteins.