Question 1

Which of the following statements correctly describe the behaviour of metals as components of metalloenzymes? Please select all that apply.

Accepted Answer

A)  The metal ions in a metalloenzyme may be coordinated to a variable number of atoms during the course of a reaction 
B)  Metal ions in a metalloenzyme do not participate chemically in the reaction being catalyzed by the enzyme 
C)  Metals are often located in the active site of metalloenzymes 
D)  Metals in metalloenzymes may not obey the octet rule 
A)  The metal ions in a metalloenzyme may be coordinated to a variable number of atoms during the course of a reaction 
B)  Metal ions in a metalloenzyme do not participate chemically in the reaction being catalyzed by the enzyme 
C)  Metals are often located in the active site of metalloenzymes 
D)  Metals in metalloenzymes may not obey the octet rule A,C,D

Question 2

Which metal forms part of chlorophyll, the light-harvesting pigment found in the chloroplasts of plants?

Accepted Answer

A)  Zinc 
B)  Copper 
C)  Manganese 
D)  Magnesium 
E)  Iron 
A)  Zinc 
B)  Copper 
C)  Manganese 
D)  Magnesium 
E)  Iron D

Question 3

A metalloprotein may contain atoms of more than one metallic element.

Accepted Answer

A) True 
 B)False  True

Question 4

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

Accepted Answer

A)  Sulfur 
B)  Iron 
C)  Calcium 
D)  Potassium 
E)  Carbon 
A)  Sulfur 
B)  Iron 
C)  Calcium 
D)  Potassium 
E)  Carbon

Question 5

The zinc atom at the centre of the zinc finger motif is held in place by which one of the following?

Accepted Answer

A)  Hydrogen bonds between the zinc atom and neighbouring amino acid side-chains 
B)  Disulfide bonds between the zinc atom and neighbouring amino acid side-chains. 
C)  Ionic bonds between the zinc atom and neighbouring amino acid side-chains. 
D)  Coordinate bonds between the zinc atom and neighbouring amino acid side-chains. 
A)  Hydrogen bonds between the zinc atom and neighbouring amino acid side-chains 
B)  Disulfide bonds between the zinc atom and neighbouring amino acid side-chains. 
C)  Ionic bonds between the zinc atom and neighbouring amino acid side-chains. 
D)  Coordinate bonds between the zinc atom and neighbouring amino acid side-chains.

Question 6

Elements whose characters fall partway between being a metal and a non-metal are called which of the following?

Accepted Answer

A)  Semi-metals 
B)  Pseudo-metals 
C)  Hemi-metals 
D)  Metalloids 
E)  Demi-metals 
A)  Semi-metals 
B)  Pseudo-metals 
C)  Hemi-metals 
D)  Metalloids 
E)  Demi-metals

Question 7

The endoplasmic reticulum is involved in the sequestering of which of the following metals to help mediate its role in cell signaling?

Accepted Answer

A)  Iron 
B)  Sodium 
C)  Potassium 
D)  Calcium 
A)  Iron 
B)  Sodium 
C)  Potassium 
D)  Calcium

Question 8

Which of the following amino acids are most likely to participate the coordination of metals at the active site of an enzyme? Please select all that apply.

Accepted Answer

A)  Valine 
B)  Proline 
C)  Histidine 
D)  Cysteine 
E)  Asparagine 
A)  Valine 
B)  Proline 
C)  Histidine 
D)  Cysteine 
E)  Asparagine

Which of the following statements correctly describe the behaviour of metals as components of metalloenzymes? Please select all that apply.

Which metal forms part of chlorophyll, the light-harvesting pigment found in the chloroplasts of plants?

A metalloprotein may contain atoms of more than one metallic element.

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

The zinc atom at the centre of the zinc finger motif is held in place by which one of the following?

Elements whose characters fall partway between being a metal and a non-metal are called which of the following?

The endoplasmic reticulum is involved in the sequestering of which of the following metals to help mediate its role in cell signaling?

Which of the following amino acids are most likely to participate the coordination of metals at the active site of an enzyme? Please select all that apply.

Chemical Analysis: Characterizing Chemical Compounds

Acids, Bases, and Buffer Solutions: Life in an Aqueous Environment

Kinetics: What Affects the Speed of a Reaction

Equilibria: How Far Do Reactions Go

Energy: What Makes Reactions Go

Reaction Mechanisms: The Chemical Changes That Drive the Chemistry of Life

Chemical Reactions, Oxidation, and Reduction: Bringing Molecules to Life

Biological Macromolecules: The Infrastructure of Life

Isomerism: Generating Chemical Variety

Molecular Shape and Structure: Life in Three Dimensions

Functional Groups: Adding Function to the Framework of Life

Hydrocarbons: The Framework of Life

Moles, Concentrations, and Dilutions: Making Sense of Chemical Numbers

Molecular Interactions: Holding It All Together

Compounds and Chemical Bonding: Bringing Atoms Together

Atoms: The Foundations of Life

Introduction: Why Biologists Need Chemistry

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Exam 11: Metals in Biology: Life Beyond Carbon

Which of the following statements correctly describe the behaviour of metals as components of metalloenzymes? Please select all that apply.

Which metal forms part of chlorophyll, the light-harvesting pigment found in the chloroplasts of plants?

A metalloprotein may contain atoms of more than one metallic element.

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

The zinc atom at the centre of the zinc finger motif is held in place by which one of the following?

Elements whose characters fall partway between being a metal and a non-metal are called which of the following?

The endoplasmic reticulum is involved in the sequestering of which of the following metals to help mediate its role in cell signaling?

Which of the following amino acids are most likely to participate the coordination of metals at the active site of an enzyme? Please select all that apply.

Chemical Analysis: Characterizing Chemical Compounds

Acids, Bases, and Buffer Solutions: Life in an Aqueous Environment

Kinetics: What Affects the Speed of a Reaction

Equilibria: How Far Do Reactions Go

Energy: What Makes Reactions Go

Reaction Mechanisms: The Chemical Changes That Drive the Chemistry of Life

Chemical Reactions, Oxidation, and Reduction: Bringing Molecules to Life

Biological Macromolecules: The Infrastructure of Life

Isomerism: Generating Chemical Variety

Molecular Shape and Structure: Life in Three Dimensions

Functional Groups: Adding Function to the Framework of Life

Hydrocarbons: The Framework of Life

Moles, Concentrations, and Dilutions: Making Sense of Chemical Numbers

Molecular Interactions: Holding It All Together

Compounds and Chemical Bonding: Bringing Atoms Together

Atoms: The Foundations of Life

Introduction: Why Biologists Need Chemistry

Filters