What is the origin of restriction endonucleases?
A. They are part of DNA repair mechanisms in eukaryotic cells
B. They are a defense mechanism against viruses in bacteria
C. They are replication enzymes of yeast
D. They are transposable elements of Drosophila
B
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As a genetic counselor, you are constructing a human pedigree for a particular disease. You note that every generation shows the trait, suggesting that the trait is
A. sex-linked. B. recessive. C. dominant. D. polygenic. E. pleiotropic.
Name the three regions (or domains) of a typical transcriptional activator
What will be an ideal response?
What are amino acids?
a. subunits of lipids b. subunits of carbohydrates c. subunits of proteins d. subunits of nucleic acids
Which of the following is true of the adrenal medulla?
1.It controls sodium and water reabsorption in kidneys. 2.It releases norepinephrine into the blood. 3.It secretes sex hormones. 4.It decreases cortisol level in the blood.