【单选题】In the DNA sequence for sickle cell anaemia, adenine replaces thymine in a CTT triplet, forming the triplet CAT. During synthesis of the sickle cell haemoglobin molecule, the amino acid valine is inco...
【单选题】Some chemotherapeutic drugs alter the ability of DNA polymerase to faithfully replicate. For the DNA sequence 5 ′– ATCGATCGATCGATCG – 3 ′ , which one of the following represents the sequence and polar...