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1) The area where the urethra exits the bladder is surrounded by a thickened layer of smooth muscle known as the bladder neck. Male infertility can be caused by various conditions that prevent the normal contraction of the bladder neck during orgasm. Why would failure of bladder neck contraction during […]

A male who has an allele for HD (Huntingtons Disease) mates with a woman who is phenotypically normal. What proportion of thier children will carry the trait (meaning have it but not show the symptons at any time in their life) and what proportion of their children will actually have […]

1. Severe combined immunodeficiency disease (SCID) is fatal at an early age. SCID is caused by the lack of the enzyme adenosine deaminase, which is encoded by the gene ADA. Suppose you want to use a gene therapy method to treat the disease. You have DNA that contains the ADA […]

1. Ribozymes in the large ribosomal subunitcatalyze peptidyl transferase activity during elongation. What isthe immediate result? A. The elongation factor EF-Tu isrecycled.B. The tRNA in the p site fallsoff the ribosome.C. A new charged tRNA moves intothe A site.D. The bond broken between thetRNA at the P site and its […]