Explore BrainMass

Biological Chemistry

Energy Span of the Respiratory Chain

Please see the attached document. Thanks. Energy Span of the Respiratory Chain: Electron transfer in the mitochondrial respiratory chain may be represented by the net reaction equation: NADH + H+ + ½ O2 H2O + NAD+ (a) Calculate the value of ∆E'0 for the net reaction of mitochondr

Carbonic Anhydrase: Calculate Turnover Number

Please help with the following problem. Provide step by step calculations. Carbonic anhydrase of red blood cells, which has a molecular weight of 30,000, is among the most active known enzymes. It catalyzes the reversible hydration of CO2, which is important for the transport of carbon dioxide from the tissues to the lungs.

Single enzyme that will breakdown all proteins,lipids, and carbs??

A friend of yours has just received a new dietary supplement purchased online. The bottle states that the single enzyme it contains will break down all proteins, lipids, and carbohydrates in food we eat into smaller easily digestible pieces. the bottle also states that the enzyme is an "organic protein." has your friend been mis

Cleaning Products, Proteins and Macromolecules

Please help with the following problem. You are the owner of a company that sells cleaning products. The people in research and development have two new products for you to review. The first is a type of hand soap that they say cuts grease because "it is from lipid and like dissolves like." The second is a laundry detergent

Estimating total body weight

If I had a body mass of 56 kg how would I get an estimate of my total body weight? I need a full calculation and what the method is called. Also, I have read that D2O IS used in some experiments to calculate tbw in kgs. Can you explain this process fully to me? The article I have read is 'Rapid measurement of deuterium conten

Biochemical Synthesized Pathways

"A branched biochemical pathway synthesizes two related essential amino acids D and F. A mutant defective for enzyme 2 will grow on minimal medium supplemented with which compounds?" The picture drawn with this problem looks something like this (I'll also attach a Word file in case this is unclear: 1

Tetrazolium test for determining viability of seeds

The performance of a seed can be determined by studying its germination and viability potential. One of the most significant advances in seed testing technology in recent years is the topographical tetrazolium method.

Question about Cell signaling

CA2+, IP3, and cAMP have all been described as second messengers. In what ways are their mechanisms of action similar? In what ways are they different? If you were comparing the molecular structure of kinesin and dynein, which part (heads or tails) would you expect to be most similar between them? Why?

An explanation of NAD and FAD

Please help answer the following questions. Provide at least 300 words in the solution. What are NAD and FAD? How do their roles differ? Which is found in greater amounts?