This is because iron is used to make a protein called hemoglobin. This protein helps blood cells carry oxygen around the body.
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The<u> repressor </u>is a type of regulator protein that binds to a region of DNA in the promoter of a gene called the operator and prevents transcription from taking place.
In the field of science, a regulator protein can be described as a kind of protein that affects the transcription of a gene by having an influence on particular DNA sites. The rate of synthesis of various proteins is controlled by the regulator proteins.
A repressor is a kind of regulator protein that prevents the transcription of a particular gene. When the rate of a protein in the body has reached normal, the transcription of the protein needs to be stopped in order for more protein of that kind to be formed. The repressor binds itself to the operator region for the gene, hence stopping the transcription process until the protein is required again.
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A community for different living organisms that support each other is called an ecosystem. The answer is (A) an ecosystem.
Diffusion is the correct answer. Air freshening molecules spread through the room through random diffusion.
