8. A molecule of hemoglobin __ 1. is shaped like a biconcave disk packed almost entirely with iron 2. contains four glycoprotein units studded with oxygen 3. consists of four globin proteins, each bound to a molecule of heme 4. can carry up to 120 molecules of oxygen

Question

8. A molecule of hemoglobin __ 1. is shaped like a biconcave disk packed almost entirely with iron 2. contains four glycoprotein units studded with oxygen 3. consists of four globin proteins, each bound to a molecule of heme 4. can carry up to 120 molecules of oxygen

Answer 1

The correct answer is option 3.

Answer 2

## Step 1Hemoglobin is a protein found in red blood cells that carries oxygen from the lungs to the rest of the body. It is not shaped like a biconcave disk packed almost entirely with iron, so option 1 is incorrect.## Step 2Hemoglobin does not contain four glycoprotein units studded with oxygen. Instead, it consists of four globin proteins, each bound to a molecule of heme. This makes option 2 incorrect.## Step 3Hemoglobin consists of four globin proteins, each bound to a molecule of heme. This is the correct description of the structure of hemoglobin, making option 3 correct.## Step 4Hemoglobin can carry up to four molecules of oxygen, not 120. This makes option 4 incorrect.

Problemas

8. A molecule of hemoglobin __ 1. is shaped like a biconcave disk packed almost entirely with iron 2. contains four glycoprotein units studded with oxygen 3. consists of four globin proteins, each bound to a molecule of heme 4. can carry up to 120 molecules of oxygen

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