Conversion of pyruvate to glucose by reversal of glycolysis has a ?Go’ of +84 kJ/mol, whereas gluconeogenesis occurs with a ?Go’ of ?38 kJ/mol. Where does the energy come from that drives gluconeogenesis? Show the three enzyme reactions where this energy is consumed.
In: Biology
In: Biology
In: Chemistry
Explain why nitrogen is shuttled from peripheral tissues to liver in the form of amino acids instead of being released into the blood as free ammonium ions for the liver to scavenge?
In: Biology
mRNA molecules carry _______ from the nucleus to the cytoplasm.
a. ribosomal subunits b. amino acids c. protein assembly instructions d. introns e. all of the above
In: Biology
In: Biology
Draw three-dimensional representations of the
following amino acids. Explain their
structures.
(a) L-phenylalanine
(b) L-histidine
(c) D-serine
(d) L-tryptophan
In: Nursing
Compare and contrast the Cori Cycle and the Alanine-Glucose Cycle. How does the use of alanine in the muscle differ from the use of the branched chain amino acids in the muscle?
In: Biology
Myoglobin and the individual subunits of hemoglobin are similar in both size and structure. Of the two, which would you predict contains a greater percentage of hydrophobic amino acids, and why?
In: Biology
Describe the process of protein synthesis starting with DNA in the nucleus and ending with proteins released from the ribosomes. Include the role of the DNA, mRNA, tRNA, rRNA and amino acids.
In: Chemistry