What living materials are used in preclinical testing?

What are the four basic classes of organic molecules how do they differ structurally and functionally

2. what process do mrna and trna work together to complete? (3 points)

Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.