organic molecules

If an unknown solution is known to have Protein, Amino Acid & Starch in it but, does not have carbohydrate or lipid in it what is it?

Chemistry behind Alzheimers disease

I need to know the chemistry behind the possible causes of Alzheimer's including bonding and molecular structure of any molecules involved in its progression or treatment. I would greatly appreciate any help you can give regarding this matter.

how do I set up an equation for this problem

If a satellite orbits the earth at a velocity of 3.2x10 to the fourth powerkm/hr, this would be the same as how many ft/min?

how to set up an equation for this problem

a bird is flying around the world at a rate of 14.5ft/sec. how may days will it take to complete its journey?(circumference of earth=25000 miles)

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the edge of the universe is expanding at the speed of the light. How fast is this in km/hr?

AN EQUATION FOR THIS PROBLEM

a DEEP SPACE PROBE IS TRAVELING AT A VELOCITY OF 18.8KM/S. WHAT IS IT VELOCITY IN MILES/MINUTES? ASTRONOMERS HAVE MEASURED A FAINT GALAXY TO BE AT DISTANCE OF 200 MEGAPARSECS FROM EARTH. hOW FAR IS THIS IN MILES?(1PARASEC=3.26LIGHT-YEARS, MEGA=1X10 TO THE SIXTH POWER). A PERFUME COMPANY WANTS TO DESPENSE 13.9 QUARTS OF A ...continues

GRE Subject Biochem problem (Chromatography Elution)

Sketch the expected chromatographic elution profile (protein concentration vs elution volume) if a mixture of these proteins is applied to a weak anion exchange resin such as DEAE-cellulose at pH 7. Label and show the salt gradient used for elution Sketch the expected chromatographic elution profile (protein concentra ...continues

Biophysics -Calculating ^G (^=delta)

In one day the average person secretes about 2.5 litres of gastric juice into the stomach. The pH of the cells in the stomach lining that perform the secretion is about 7 (the same as for all cells) and the pH of the stomach is about 1. Thus, H+ ions must be moved against an H+ gradient. The free energy change for moving molecul ...continues

GRE Biochem Question (Ligand Binding)

Plot the following data using a Sacatchard type plot. The change in fluorscence is proportional to binding. A) Determine the max binding constant for the protein complex Realtive Fluorescence (Response) [Protein] nM (concentration of added protein) 5.70E+04 0 5.73E+04 0.1 5.78 ...continues

GRE Subject Question

How many different primary sequences are possible for a pentapeptide made from natrually occurring amino acids? Considering that most proteins are composed of one hundred or more what conclusions can be drawn from the calculation?