Review the experiments by Kohler and Lipton described in Figure 9.5. What is the key difference between blood serum and blood plasma that affects their ability to help fibroblasts grow in culture?
A)Serum contains more platelet cells than plasma, and platelet cells promote cell growth.
B)Molecules found in serum promote cell growth; these molecules are not found in plasma.
C)Plasma contains more platelet cells than serum, and platelet cells inhibit cell growth.
D)Molecules found in plasma inhibit cell growth; these molecules are not found in serum.

Question

Review the experiments by Kohler and Lipton described in Figure 9.5. What is the key difference between blood serum and blood plasma that affects their ability to help fibroblasts grow in culture?  
A)Serum contains more platelet cells than plasma, and platelet cells promote cell growth. 
B)Molecules found in serum promote cell growth; these molecules are not found in plasma. 
C)Plasma contains more platelet cells than serum, and platelet cells inhibit cell growth. 
D)Molecules found in plasma inhibit cell growth; these molecules are not found in serum.

Quizplus · Accepted Answer

The key difference between blood serum and blood plasma is that serum contains molecules that promote cell growth, which are not found in plasma. This is demonstrated by the experiments conducted by Kohler and Lipton, where fibroblasts grown in serum-containing medium had higher growth rates than those grown in plasma-containing medium.

Review the Experiments by Kohler and Lipton Described in Figure