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| Metalloproteins are proteins that contain metal ions as integral parts of their structure and function. These metal ions play crucial roles in the biological activity of the protein, contributing to functions such as enzymatic catalysis, electron transfer, and metal ion transport. Examples of metalloproteins include hemoglobin, which contains iron ions and transports oxygen in red blood cells, and cytochrome c, which contains heme and plays a role in electron transport in cellular respiration.
The incorporation of metal ions into metalloproteins is often essential for their specific biological functions. Metalloproteins exhibit a diverse range of structural motifs and coordination geometries that allow them to bind and utilize metal ions effectively. The metal ions within metalloproteins can undergo reversible oxidation-reduction reactions or act as Lewis acids or bases, facilitating biochemical reactions that are crucial for cellular processes. |
Metalloproteins Online Quiz
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- Test Name: Metalloproteins MCQ Quiz Practice
- Type: Quiz Test
- Total Questions: 40
- Total Marks: 40
- Time: 40 minutes
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Metalloproteins Flashcards
Which metal ion is commonly found in metalloproteins and plays a crucial role in electron transfer reactions?
Iron
What is the term for the specific site within a metalloprotein where the metal ion is coordinated by amino acid residues?
Metal binding site
Which type of metalloproteins contain iron-sulfur clusters and participate in electron transfer reactions?
Ferredoxins
Which metal ion is found in the heme group of hemoglobins and is responsible for binding oxygen?
Iron
What is the term for the metalloprotein involved in oxygen storage and transport in muscle tissues?
Myoglobin
Which metalloprotein acts as an antioxidant by scavenging free radicals and protecting cells from oxidative damage?
Superoxide dismutase
What is the term for the metalloprotein involved in electron transfer reactions in the respiratory chain?
Cytochrome c
What is the function of metalloproteins known as cytochromes in cellular respiration?
Electron transport
What is the term for the metalloprotein responsible for transporting copper in the bloodstream?
Ceruloplasmin
Which metal ion is present in the active site of metalloenzymes called copper-dependent enzymes?
Copper
Which metal ion is essential for the activity of metalloproteins involved in oxygen transport and storage?
Iron
What is the term for the metalloprotein responsible for binding and transporting oxygen in the bloodstream?
Hemoglobin
Which metal ion is commonly found in metalloproteins involved in oxygen sensing and regulation?
Iron
What is the term for the metalloprotein involved in oxygen sensing and regulation in cells?
Hypoxia-inducible factor
What is the term for the metalloprotein involved in electron transfer reactions in photosynthesis?
Cytochrome b6f
What is the term for the metalloprotein involved in the transport of oxygen from the lungs to tissues?
Hemoglobin
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