Free energy vs activation energy

I'm having a diffucult time understanding free energy vs activation energy are they the same? I know free energy is the portion of a system's energy that is available for work but what is this compared to the activiation energy?

Various questions on cells

1. Most cells are very small. What physical and metabolic contrainsts limit cell size? 2. What problems would an enormous cell encounter? 3. What adaptions might help a very large cell to survive?

Cellular Survival

The integrity of the plasma membrane is essential for cellular survival. Could the immune system utilize this fact to destroy foreign cells that have invaded the body? How might cells of the immune system disrupt membranes of foreign cells? (Two hints: virtually all cells can secrete proteins, and some proteins form pores in membranes.) Most cells are very small. What physical and metabolic constraints limit cell size? What problems would an enormous cell encounter? What adaptations might help a very large cell to survive? When a brown bear eats a salmon, does the bear acquire all the energy contained in the body of the fish? Why or why not? What implications do you t... click for more

Eukaryotic Cells

Often, prokaryotic cells exist as simple unicellular organisms, but in some species, prokaryotic cells can grow together in colonies or filaments. In addition, some species, such as Cynaobacteria or Myxobacteria, demonstrate intercellular communication, or might even produce specialized cells and structures. However, only eukaryotic cells form the bodies of multicellular organisms with complex internal specialization. Develop one or two hypotheses explaining why only eukaryotic cells are found in multicellular organisms.

DNA

Today, scientific advances are being made at an astounding rate, and nowhere is this more evident than in our understanding of the biology of heredity. Using DNA as a starting point, do you believe there are limits to the knowledge people should acquire? Defend your answer. Because genetics is important to so many aspects of human behavior, defense attorneys might consider using a defendant's genetic constitution as a strategy to excuse criminal behavior. Take one of the two sides listed below: 1) Present an argument about why a defendant's genes should be considered as a factor in the criminal behavior. or 2) Present an argument about why a defendant's genes do not excuse ... click for more