Q1. E.coli was incubated with aeration in a nutrient medium contain two carbon sources, and the following growth curve was made from this culture.

a.) Describe what happened at the time marked “x”.

b.) Which substrate provided “better” growth conditions for the bacteria? How could you tell?

Q2. Mary is in an automobile accident and injures her spinal cord. She has lost feeling in her right hand and her doctor tells her it is the result of swelling compressing a portion of her spinal cord. Which part of her cord is possible to be compressed?