There are 20 amino acids that form peptide bonds in proteins. Which of the following identifies the specific feature that makes one amino acid different from another?

Which prevent errors in dna replication? a. helicase enzyme checks the dna for errors. b. each base can attach to only one other type of base. c. ribosome enzymes prevent errors from happening. d. dna contains no complementary base pairs.

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

Jason adds the antibiotic penicillin to a bacterial culture. the bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. what caused this genetic modification?