Biochemistry Answers

Below is the concentration of lactic acid in the blood of an athlete before, immediately after and one hour after completing a 400 m sprint.

Before race 25 M Immediately after race 197 M One hour after race 26 M

How can you explain the large increase in lactic acid (25 M versus 197 M) at the completion of the race?

b) You have identified a mutant yeast whose glycolytic pathway is shorter due to the presence of a new enzyme catalysing the following reaction:

Glyceraldehyde-3-Phosphate + H2O + NAD+ →

3-phosphoglycerate + NADH + H+

What would the effect of this mutation have on this mutant yeast’s ability to grow under i) aerobic, and ii) anaerobic conditions?

Why does blood clot inside a syringe? What is the mechanism of it?

How many ATPs are produced from xylose by B.subtilis aerobically ?

What is the possible connection between Urea cycle and other metabolic pathways? Can intermediates of urea cycle can serve as precursors for amino acid, carbohydrate, fatty acid and/or nucleotide metabolism (anabolism/catabolism). Give examples

Pyruvate dehydrogenase complex activates:

What are synthetic hormones?

What is the meaning of Floccules?

A. A dosage form that has the skin as a target organ

B. A hydrocarbon bass that is greasy or oily

C. Little flakes

D. They are made of adhesive sprayed on a backing of paper, fabric, moleskin or plastic

Calculate the amount of ATP generated from the complete oxidation of a triglyceride with a X, Y, and Z acyl chain of carbons; include an accounting of the electron carriers and molecules of ATP produced at each stage of metabolism. Compare the ratio of ATP:C to that achieved by the complete oxidation of glucose muscle cells. Describe how the acetyl units would be used during [normal/low] [glucose] periods.

The peptide sequence that corresponds to the substrate sequence that binds [name of enzyme] will be provided. Titrate the sequence to determine the pI of the sequence. Indicate the range of pH that one would find the sequence to be (+), (0), and (-). 

Indicate the impact on metabolic processes, super high [regulatory molecule] will have on: glycolysis, gluconeogenesis, pyruvate oxidation, citric acid cycle, electron transport chain, oxidative phosphorylation, glycogen, lipid, and amino acid metabolism. Support your response by summarizing why this impact would be observed.