Chapter 11 Multiple-choice questions

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. Zinc finger motifs are a particular characteristic of proteins with which one of the following functions?

Biochemical catalysis. (The proteins are enzymes) correct incorrect

Formation of the cell cytoskeleton. (The proteins are structural proteins.) correct incorrect

Gene regulation. (The proteins are DNA-binding proteins.) correct incorrect

Signal transduction across the cell membrane. (The proteins are transmembrane proteins.) correct incorrect

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. Metals are unable to exhibit metallic bonding in biological systems. True or false?

True correct incorrect

False correct incorrect

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. Which of the following elements are classed as metals? Please select all that apply.

Oxygen correct incorrect

Iron correct incorrect

Calcium correct incorrect

Chlorine correct incorrect

Lithium correct incorrect

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. Which of the following metals are involved in the transmission of nerve impulses? Please select all that apply.

Lithium correct incorrect

Iron correct incorrect

Potassium correct incorrect

Zinc correct incorrect

Sodium correct incorrect

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. Which metal forms part of the haem group, to which oxygen binds in haemoglobin?

Zinc correct incorrect

Copper correct incorrect

Manganese correct incorrect

Iron correct incorrect

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. Only iron-containing proteins can bind oxygen. True or false?

True correct incorrect

False correct incorrect

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. In the active sites of many enzymes, metals are coordinated by the amino acid histidine. Which element in histidine donates the electrons that form the coordinate bond?

Carbon correct incorrect

Oxygen correct incorrect

Nitrogen correct incorrect

Sulfur correct incorrect

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. Metal-containing enzymes are collectively known by which of the following names?

Metallic enzymes correct incorrect

Organometallic enzymes correct incorrect

Cofactors correct incorrect

Metalloenzymes correct incorrect