Biology Answers

Answer the blank: A particular chemical reaction will only proceed if the particles of its reactants possess energy that is greater than 250 kilojoules (kJ/mol). 250 kJ/mol is the ________________________ for this reaction.

Answer the blank: The binding of ATP with the enzyme pyruvate kinase results in this enzyme's failure to catalyze the last step in the breakdown of glucose during the process of glycolysis. In this situation, ATP acts as the ______________________________ of pyruvate kinase.

Answer the blank: The unstable compound that is formed when the disaccharide maltose binds with the active site of the enzyme maltase is called ___________________________.

Answer the blank: Pepsin is an enzyme present in gastric juice. In the stomach, it catalyzes the breaking down of proteins into shorter polypeptides. Therefore, proteins are the _________________ of pepsin.

Answer the blank: Destruction of the ozone layer takes place when its component ozone (O3) is converted into oxygen gas (O2) as shown by the following chemical equation O3 + O = 2O2

Although degradation of O3 happens naturally, there are some man-made substances that cause this process to take place at a rate which is harmful to the environment. One such substance is chlorofluorocarbon or CFC. In the presence of ultraviolet (UV) radiation, a chlorine (Cl) atom from CFC reacts with O3 and converts its to O2 at a faster rate. This is shown by the 2 equations below.

Cl + O3 = ClO + O2

ClO + O = Cl + O2

In this process, the chlorine atom acts as _________________________

What are precaval veins

Explain the biodeterioration of the following structures:

1. Museum buildings

2. Aircrafts (in transportation)

3. Railways, rail lines and coaches.

You are a team of biochemists, botanists, and microbiologists who were tasked to isolate and identify antimicrobial peptides (AMPs) from endemic plants in the Philippines. In one of your studies, you were able to isolate 4 AMPs from a certain shrub in the mountainous area of Cebu, where 3 of them consists of amino acids only while the last one has a carbohydrate moiety. The AMPs were tested using amino acid analyzer and found out the following sequences for the 4 peptides

Amino Acid Sequence

1. Val-Gly-Leu-Phe-Asp-Phe-Val-Phe-Tyr-Gly-Ser-Phe (VGLFDFVFYGSF)
2. Asn-Pro-Cys-His-Glu-Ala-Cys-Cys-Ser-Cys-Leu-Cys (NPCHEACCSCLC)
3. Gly-Gly-Leu-Trp-His-Ala-Val-Trp-Thr-Trp-Phe-Ala-Trp (GGLWHAVWTWFAW)
4. (with carbohydrate moiety) Ser-Leu-Glu-Lys-Gly-Leu-Asp-Gly-Ala-Lys-Lys-Ala (SLEKGLDGAKKA)

Now create a procedure using different color reactions that would easily distinguish the four peptides from one another

II. Hypothesis-Testing Method Design

A. Problem

B. Theory

C. Hypothesis

D. Procedure

E. Results and Discussion

F. Conclusion

Predict the migration of the amino acid tryptophan in an electrophoresis matrix using buffer at pH 10. Illustrate it by placing a spot indicating the amino acid at each electrophoresis diagram below labeled with the corresponding pH. Show the ionization of tryptophan and the calculation of its pI below

Predict the migration of the amino acid tryptophan in an electrophoresis matrix using buffer at pH 7. Illustrate it by placing a spot indicating the amino acid at each electrophoresis diagram below labeled with the corresponding pH. Show the ionization of tryptophan and the calculation of its pI below