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2 Feb 2019

Mineral associated with cytochrome is

(a) Cu

(b) Mg

(c) Cu and Mg

(d) Fe.

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Related questions

Mg is a component of

(a) chlorophyll

(b) cytochrome

(c) haemoglobin

(d) haemocyanin.

Determine which of these statements describing the cytochrome P450 family of enzymes or the mechanism of action are true.

a) The iron in cytochrome P450s can exist in both Fe2 and Fe3 states in a single catalytic cycle.

b) The coenzyme NADPH can serve as a source of electrons for cytochrome P450s.

c) Fe3 acts as a general base during the catalytic cycle.

d) Each cytochrome P450 isoform can act on only one specific organic substrate.

e) Cytochrome P450 uses molecular oxygen (O2) as a reactant.

f) The activity of cytochrome P450 generally results in carboxylated products.

Please include an explanation with your answer! Thank you.

Welding fumes are a common occupational exposure. Several different welding fumes can cause similar adverse health effects. Personal sampling of a welding operation at a manufacturing facility produced the following 8-hour time-weighted average (TWA) results for individual metal fumes. Metal Fume Result OSHA PEL ACGIH TLV Antimony 0.05 mg/m³ 0.5 mg/m³ 0.5 mg/m³ Beryllium 0.00001 mg/m³ 0.002 mg/m³ 0.00005 mg/m³ (I) Cadmium 0.025 mg/m³ 0.1 mg/m³ 0.01 mg/m³ Chromium 0.02 mg/m³ 1 mg/m³ 0.5 mg/m³ Copper 0.03 mg/m³ 0.1 mg/m³ 0.2 mg/m³ Iron Oxide 0.5 mg/m³ 10 mg/m³ 5 mg/m³ (R) Magnesium Oxide 0.02 mg/m³ 15 mg/m³ 10 mg/m³ Molybdenum 0.003 mg/m³ 15 mg/m³ 10 mg/m³ (I) BOS 4301, Industrial Hygiene 3 Nickel 0.25 mg/m³ 1 mg/m³ 1.5 mg/m³ (I) Zinc Oxide 0.3 mg/m³ 5 mg/m³ 2 mg/m³ (R) (R) Respirable fraction (I) Inhalable fraction Briefly summarize the primary health effects associated with overexposure to each type of metal fume, including both acute and chronic health effects. Explain what analytical methods you would use for evaluating health hazards in the workplace. Identify the types of metal fumes that would produce similar health effects on an exposed worker. Assume that each listed metal can cause respiratory irritation. Use the equation in 1910.1000(d)(2)(i) to calculate the equivalent exposure (in relation to OSHA PELS) for the metal fumes with similar health effects based on the “Result” column in the table above. Discuss whether you believe any of the individual metal fume exposures or the combined exposure exceeds an OSHA PEL or an ACGIH TLV.

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