Biochemistry Answers

how does the process of excitation-contraction-coupling and relaxation help body movement?

1. Is the blood–brain barrier permeable to insulin? Explain.

2. Caffeine is a diuretic. What effect will drinking a lot of coffee have on the specific gravity of your urine?

3. What happens to the oxygen-carrying capacity of hemoglobin when the pH is lowered? What is the name of this effect?

What are 20 examples of organisms species that show the wide variety of life

1.A nucleic acid has 13% of adenine. Determine the composition of guanine, cytosine

and thymine.

2. What are the forces that stabilize the double stranded DNA?

3. Name the type of bond that links

a. A nucleotide to another nucleotide in a DNA molecule

b. A nitrogenous base to a ribose sugar in an RNA molecule

4. Give the structural differences between RNA and DNA

5. Under aerobic catabolism of glucose, in which compartment of the eukaryotic cell does

the following reactions occur?

a. Conversion of pyruvate to acetyl CoA.

b. Conversion of succinyl-CoA to succinate

c. Conversion of NADH to ATP

d. Conversion of phosphoglycerate to phosphoenolpyruvate

6. Describe various mechanisms for regulation of blood glucose.

7. Give an account of β – oxidation of saturated even carbon fatty acid (Palmitic acid)

along with the total ATPs obtained. 

1. Under aerobic catabolism of glucose, in which compartment of the eukaryotic cell does 

the following reactions occur?

a. Conversion of pyruvate to acetyl CoA.

b. Conversion of succinyl-CoA to succinate

c. Conversion of NADH to ATP

d. Conversion of phosphoglycerate to phosphoenolpyruvate

2. Describe various mechanisms for regulation of blood glucose.

3. Give an account of β – oxidation of saturated even carbon fatty acid (Palmitic acid)

along with the total ATPs obtained. 

Calculate the salt to acid ratio ([Aˉ]/[HA]) of a solution of an amino acid at pH 2 and 

pKa of 8.95

You have prepared a 0.11 M acetate buffer solution in a volume of 1 L at pH 5.76. You then added 80 mL of 0.1 M HCl to the solution. What is the final pH?

pKa of acetic acid: 4.76

How is the initiation codon, identified by the ribosomes during translation in prokaryotes and Eukaryotes?

Describe how genetic information is expressed as proteins. In you answer, describe DNA replication, transcription and translation. 

1.    Which of the following mechanisms cannot be used to regulate metabolic pathways?

a)    Allosteric activators and inhibitors.

b)   Covalent modifications of enzymes.

c)    Regulation of the genes for the enzymes used in the pathway.

d)   Use of different enzymes at a given point in the forward and reverse metabolic pathways.

e)    None of these. They are all mechanisms used to regulate metabolic pathways.