Answer the following questions about hemoglobin: A. What determines the type and order of amino acids in the hemoglobin molecule? B. Where do these amino acids come from? C. How ma... Answer the following questions about hemoglobin: A. What determines the type and order of amino acids in the hemoglobin molecule? B. Where do these amino acids come from? C. How many polypeptide chains are present in hemoglobin? D. Where are the polypeptide chains produced in the cell? E. How many genes are needed to produce hemoglobin? F. What happens when hemoglobin loses its shape?
Understand the Problem
The question is about hemoglobin structure and function. It requires answering several questions related to the composition, origin, synthesis, and consequences of structural changes in hemoglobin molecules. Specifically, the questions ask about:
- The determinant of the type and order of amino acids in hemoglobin.
- The origin of these amino acids.
- The number of polypeptide chains in hemoglobin.
- The location of polypeptide chain production in the cell.
- The number of genes needed to produce hemoglobin.
- The consequences of hemoglobin losing its shape.
Answer
A. DNA sequence. B. Diet. C. Four. D. Ribosomes. E. Multiple. F. Loses function.
Here are the answers to the questions about hemoglobin: A. The DNA sequence of the gene. B. Diet (ingested and then synthesized, or directly ingested). C. Four. D. Ribosomes. E. Multiple (at least 3). F. It loses its function.
Answer for screen readers
Here are the answers to the questions about hemoglobin: A. The DNA sequence of the gene. B. Diet (ingested and then synthesized, or directly ingested). C. Four. D. Ribosomes. E. Multiple (at least 3). F. It loses its function.
More Information
Each hemoglobin molecule contains four polypeptide chains (two alpha and two beta chains), and the sequence of amino acids in these chains is determined by genes. Amino acids are obtained through diet. Polypeptide chains are produced in ribosomes. When hemoglobin loses its shape (denatures), it can no longer bind to oxygen. Therefore multiple genes are needed to produce hemoglobin.
Tips
It's important to remember that protein structure is determined by its amino acid sequence, which in turn is determined by the DNA sequence of the gene.
Sources
- Hemoglobin - Wikipedia - en.wikipedia.org
- Hemoglobin Chain - an overview | ScienceDirect Topics - sciencedirect.com
- Biochemistry, Essential Amino Acids - StatPearls - NCBI Bookshelf - ncbi.nlm.nih.gov
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