Question

Scientists have been able to splice the eukaryotic gene for the production of human insulin into the genome of bacterial cells and induce those bacteria to express the gene and produce insulin. This suggests which of the following?

• A. Prokaryotic cells many have evolved from eukaryotic cells
• B. DNA is a universal molecular carrier of genetic information for all life on the planet
• C. Bacteria cells naturally produce and use insulin
• D. Humans have a symbiotic relationship with certain species of bacteria living in their intestines that produce insulin

Answer 1

The correct option is B DNA is a universal molecular carrier of genetic information for all life on the planet

DNA as a molecule is same in all organisms only the coding pattern differs, that is all organisms have A-T, G-C in varying proportions, following Chargaff's rule. Therefore, a small desired segment of DNA fragment can be introduced into the bacterial DNA as a process of genetic engineering, like human insulin gene.

So, the correct answer is 'DNA is a universal molecular carrier of genetic information for all life on the planet'