Discussion Questions — -Part D 381 



12. Describe the enzymes active in the oxidation of fatty acids. Include 

 a discussion of the methods of observing changes in these enzymes and also 

 of the energy changes which occur. 



13. Describe the changes in the mechanical properties of several high 

 polymers following exposure to ionizing radiations. Correlate these changes 

 with other changes in the polymer properties. 



14. Catalase activity is altered in various fashions by ionizing radiations, 

 depending on the temperature at which dry catalase films are irradiated. 

 Discuss the form of the temperature curve and its significance. 



15. Review the evidence indicating that all forms of ionizing radiations 

 have effects on single films of proteins which can be described by the equations 

 for target theory. Cite specific examples. 



16. Describe the difficulties of assigning a specific inactivation cross section 

 to virus particles. 



17. Describe the metabolic and morphological changes which occur in 

 euglena when they are transferred from a well-lighted environment to a dark 

 one. 



18. Review the history of the development of our knowledge of chloroplast 

 structure and function. 



19. Describe the evidence for the existence of free radicals during photo- 

 synthesis. What role do these free radicals play in the photosynthetic process ? 



20. Review in detail the experiments which have led to the present ideas 

 about the path of carbon in photosynthesis. 



21. How was the photosynthetic phosphorylation shown to be one of the 

 major parts of the photosynthetic processes occurring in the chloroplast ? 



22. Review the interpretation of the evolution of fishes and higher verte- 

 brates necessary to explain the distribution of retinal pigments. What other 

 lines of evidence also support this interpretation ? 



23. Describe the current theories concerning the role of the carotenoid oil- 

 droplets in the vision of snakes and birds. What is the evidence supporting 

 these theories? 



24. How and where is retinene synthesized in the human body? How is 

 this demonstrated ? 



25. What is the evidence that the red eye-spot in euglena actually functions 

 as a visual receptor? 



