LIFE SCIENCE

Detailed explanation-1: -Answer and Explanation: Hereditary information (with the exception of some viruses) is preserved in: A. deoxyribonucleic acid.

Detailed explanation-2: -The relationship between genetic information carried in DNA and proteins. The complete set of information in an organism’s DNA is called its genome, and it carries the information for all the proteins the organism will ever synthesize. (The term genome is also used to describe the DNA that carries this information.)

Detailed explanation-3: -Deoxyribonucleic acid (abbreviated DNA) is the molecule that carries genetic information for the development and functioning of an organism. DNA is made of two linked strands that wind around each other to resemble a twisted ladder-a shape known as a double helix.

Detailed explanation-4: -In living organisms, the genome is stored in long molecules of DNA called chromosomes. Small sections of DNA, called genes, code for the RNA and protein molecules required by the organism. In eukaryotes, each cell’s genome is contained within a membrane-bound structure called the nucleus.

Detailed explanation-5: -We now know that the DNA carries the hereditary information of the cell (Figure 4-2). In contrast, the protein components of chromosomes function largely to package and control the enormously long DNA molecules so that they fit inside cells and can easily be accessed by them.