Which of the following acts as lipid soluble radical trapping antioxidant? A. Ascorbate B. Uric acid C. Polyphenol D. Ubiquinone
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Which of the following acts as lipid soluble radical trapping antioxidant?
A. Ascorbate
B. Uric acid
C. Polyphenol
D. Ubiquinone
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- Which of these is an advantage of phosphate buffer solutions in biological research? Select one: a. It is non-toxic to cells b. It is isotonic to the cellular environment c. It helps to maintain a constant pH in a chemical reaction d. All of the aboveChoose compound with donor-acceptor chemical bond. Select one: a. HCl b. CO2 c. P2O5 d. COSilvadene, a topical treatment for burns, contains 1% silver. What category of chemical antimicrobial agent is in Silvadene? Select one: a.antibiotics b.None of the Above c.halogens d.aldehydes e.oxidizing agents
- Explain the property of free radicals that makes them dangerousChoose the combination of answers that most accurately completes the statement.The primary mode of action of nonionizing radiation is to a. produce superoxide ions c. denature proteins b. make pyrimidine dimers d. break disulfi de bondsBubbles of CO2 are formed during the reaction between vinegar, water and Alka Seltzer. Provide an argument for why the CO2 molecules do not remain in the solution.
- Scenario You have a polypeptide chain that is linked by disulfide bond. If beta-mercaptoethanol is applied, there is no disulfide bond anymore. What has happened to the polypeptide chain after the detergent abovehas been applied. Does it increase, decrease or remain the same?Which exchange resin can be used to separate two tripeptides (MDEA and CKRF)?A. Both B and C B. Anion exchange resins C. Cation exchange resins. D. None of the abovewhich of the following solvents would NOT dissolve lipids and why? a. Hot ethanol - because this solvent is polar b. Chloroform - because this solvent is polar c. Water - because this solvent is polar d. hexane - because this solvent is non-polar
- What is the difference between hydrophobic and hydrophilic surface, when it comes to wetting? Use a schematic diagram to illustrate your answer.This highly unstable agent can react strongly with DNA and proteins. a. ethylene oxide b. formaldehyde c. calcium hypochlorite d. triclosan e. hydrogen peroxideWhich of the following is not an inhibitor? a. CO b. Magnesium ion c. sulfa drugs d. cyanide e. penicilin