If a scientist observes an enzyme polypeptide chain arranged in spiral turns that rise upward and are held in place by hydrogen bonds he/she is looking at a tertiary structural arrangement.
The answer isssss c:):):):
Answer:
First one
Explanation:
Only answer that makes sense.
Answer:
Cellular respiration that proceeds in the absence of oxygen is anaerobic respiration. Cellular respiration that proceeds in the presence of oxygen is aerobic respiration. Anaerobic respiration evolved prior to aerobic respiration.
Biological evolution is the process through which the characteristics of organisms change over successive generations, by means of genetic variation and natural selection. hope that helps
