What is the cause of Tay—Sachs disease?
What will be an ideal response?
Tay—Sachs is a lethal disease resulting from a mutation in an essential gene. The mutation results in an enzyme deficiency (hexosaminidase A ) that prevents proper nerve function.
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What is a karyotype?
A. A complete sequence of our DNA B. A picture of all the chromosomes in one person's cell C. A list of all the genes on our chromosomes D. A list of all the mutations in our chromosomes
The contents of the xylem sap in plant roots are:
A. the same as the solute composition of the surrounding soil. B. always high in sugars. C. always higher in water than the surrounding soil. D. selectively maintained by endodermal cells. E. very acidic.
Staphylococcus aureus is the causative agent of
A. bacterial vaginosis. B. puerperal fever. C. toxic shock syndrome. D. gas gangrene. E. bacterial vaginosis AND puerperal fever.
When an organism (such as a ground squirrel) becomes hypothermic, are ONLY the respiratory reactions likely to be affected, or would the overall metabolism of the organism be depressed?
a. only the respiratory reactions are likely to be affected b. the overall metabolism of the organism would be depressed c. there is little affect on any of the organism's systems