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.
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>