Which of the following proteins is on the surface of viruses and play an important role in allowing the virus to recognize and bind to the host cell?
a D and B coat proteins
b C and G coat proteins
c H and N coat proteins
d P and T coat proteins

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.

Several billion years ago which gas was the least prevailant in the atmosphere

Which of the following is required of a new drug?me