The gene that encodes Factor VIII, a protein that functions in the blood-clotting pathway, contains ___ exons. Mutations in this large gene are responsible for the most prevalent form of the blood disorder hemophilia.
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举一反三
- Among the following genes, ( ) is the housekeeping gene. A: Ribosomal protein gene B: Hemoglobin gene C: Insulin protein gene D: Ovalbumin gene
- In patients with thrombocytopenia, spontaneous bleeding spots and<br/>purpura often appear on the skin and mucosa, mainly due to () A: Not easy to form antithrombus<br/>[B].<br/>Blood vessels do not constrict easily B: Failure to maintain the integrity of vascular endothelium C: Blood clot retraction disorder D: Blood clotting disorders
- The researchers found that______. A: the gene therapy could be verified by animal experiments B: the antitat gene may be artificially produced C: antitat protein functions without causing any side-effects D: antitat gene enhances the human immune system
- Deletion of 4 bases from the coding region of a gene will give _______. A: nonsense mutations B: missense mutations C: silent mutations D: frameshift mutations
- Monetary _____ is the most important factor in encouraging citizens’ blood donation in many countries. </p></p>
内容
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降解物基因活化蛋白（Catabolic gene activator protein）
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Normally, if a healthy cell acquires too many mutations to develop properly, the p53 gene will initiate cellular suicide. If this gene stops working, however, the cell keeps growing and can become malignant .
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Which is the major factor affecting the resistance of blood flow?() A: Velocity of blood flow B: The length of blood vessel C: Viscosity of blood D: The diameter of arteriole E: The compliance of aorta
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The base substitution in the coding region of the gene must lead to the change of protein structure
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The operator is A: Another name for the terminator of a gene B: A DNA site bound by repressor proteins C: A protein that coordinates gene expression D: A part in the leader region of mRNA