Multiple Choice
An ion has 109 electrons, 110 neutrons, and 108 protons. What is the mass number of this ion?
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2. Atoms & Elements
The Atom
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Iron is an essential component of which biological molecule responsible for oxygen transport in the blood?
A
Insulin
B
Hemoglobin
C
DNA
D
Chlorophyll
Verified step by step guidance1
Identify the biological molecules listed: Insulin, Hemoglobin, DNA, and Chlorophyll.
Recall the function of each molecule: Insulin regulates blood sugar, DNA stores genetic information, Chlorophyll is involved in photosynthesis, and Hemoglobin transports oxygen in the blood.
Understand that iron is a key component of hemoglobin, specifically in the heme group, which binds oxygen molecules.
Recognize that hemoglobin's ability to carry oxygen is due to the iron atoms within its structure.
Conclude that the biological molecule responsible for oxygen transport in the blood containing iron is hemoglobin.
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