How many total polypeptide chains would be present in a single nucleosome core particle?

What would be the most likely result if the ph of the stomach were increased to 5

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen

What is the next step in muscle contraction after the actin changes shape? (apex)