What is the difference between a first messenger and a second messenger? Give an example of each. What will be an ideal response?
The first messenger binds the inital receptor. Second messengers relay signals inside the cell and
thereby amplify the signal from the first messenger. An example of a first messenger is prostaglandin
with its second messenger being cAMP
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Which of the following is a reason why bioconversions are replacing chemical synthesis of certain compounds?
A. Bioconversions yield specific and biologically active stereoisomers. B. Enzyme catalyzed reactions in the bioconversion process proceed much more rapidly. C. Enzymes catalysts are not destroyed in the bioconversion process. D. Bioconversions facilitate the scaling up of reactions.
Before a type II hypersensitivity can proceed, three immune components must be in place: complement, IgG, and IgM.
Answer the following statement true (T) or false (F)
Which substance is normally found in the glomerular filtrate but not in urine?
A. salts B. glucose C. water D. uric acid E. All are components of glomerular filtrate and urine.
Which of the following can serve as an energy source and as structural support in plant cells?
A) Nucleic acids B) Lipids C) Carbohydrates D) Proteins