3 Questions

1.Some species of bacteria that live at the surface of sediment on the bottom of lakes are facultative anaerobes; that is, they are capable of either aerobic or anaerobic respiration. How will their metabolism change during the summer when the deep water becomes anoxic (deoxygenated)? If the bacteria continue to grow at the same ...continues

Eukaryotic cells

I am trying to figure why the eukaryotic cells can be found in the multicellular organisms?

Categorize organisms

I need the following using the scientific method that would detail the following for each, viruses in soil, bacteria in soil, fungi in soil and or parasitic worms in soil Should be a Hypothesis, Experimentation and Conclusion for each one. Can be simple. Soil could be from anywhere in the world. Hypothesis - Experimentati ...continues

Physical and metabolic contraints

I need guideness on the physical and metabolic constraints limit cells size? And how an enormous cell encounter and adapations would help large cells survive?

The Building Blocks of Biology

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 euk ...continues

Discussion Questions

Pull a problem from today's headlines and describe how you would apply the scientific method to solve the problem. Your problem can be scientific or touch on another area, but remember that the scientific method must be applicable. Label and discuss each step. Explain how an understanding of basic chemistry may help scienti ...continues

Glucose breakdown, Glycolysis, and ATP Depletion

Imagine that a starving cell reached the stage where every bit of its ATP was depleted and converted to ADP plus phosphate. If that cell were placed in fresh nutrient broth at this point, would it recover and survive? Explain your answer on the basis of what you know of glucose breakdown.

Free energy vs activation energy is contrasted.

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 are included.

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

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 ...continues