Question

Which five statements about hemoglobin and myoglobin structure are true? Each iron atom can form six coordination bonds. One of these bonds is formed between iron and oxygen. By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron atom. Molecular oxygen binds irreversibly to Fe2+ in heme. Heme is composed of an organic protoporphyrin component and a metal atom. Hemoglobin and myoglobin are heterotetramers. Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron atom. Each hemoglobin molecule can bind four oxygen molecules; each myoglobin can bind only one oxygen molecule.

Answer 1

Answer:

Here's what I get  

Explanation:

Each iron atom can form six coordination bonds. One of these bonds is formed between iron and oxygen.  

TRUE

By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron atom.  

TRUE

Molecular oxygen binds irreversibly to Fe²⁺ in heme.  

False. It binds reversibly with heme.

Heme is composed of an organic protoporphyrin component and a metal atom.  

TRUE

Hemoglobin and myoglobin are heterotetramers.

False. Hemoglobin is a tetramer. Myoglobin a monomeric protein.

Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron atom.

TRUE

Each hemoglobin molecule can bind four oxygen molecules; each myoglobin can bind only one oxygen molecule.

TRUE

Answer 2

Answer:

1.  Each iron atom can form six coordination bonds. One of these bonds is formed between iron and oxygen

2.By itself heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron atom.

3.Each hemoglobin molecule can bind four oxygen molecules; each myoglobin can bind only one oxygen molecule.

4. Heme is composed of an organic protoporphyrin component and a metal atom.

5.  Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron atom.

Explanation:

Myoglobin is a protein that is muscle tissues, it functions as an oxygen storage unit. Hemoglobin is found in the fed blood dells, it functions as an oxygen transporter. It transport oxygen from the lungs to the rest of the body.