How does an RFLP help identify sickle-cell anemia?
What will be an ideal response?
The normal globin gene is associated with three DdeI sites. The mutation that causes sickle-cell anemia changes one of those sites, leaving only two. This can be detected by PCR amplifying the globin gene and digesting with the DdeI restriction enzyme. A normal person yields two bands, while a person with sickle-cell anemia yields only one larger band.
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The adult form of which of the following animals is not capable of locomotion?
a. sponges b. jellyfish c. ctenophores d. planarians e. flukes
The human knee-jerk reflex requires an intact _____
A) spinal cord B) corpus callosum C) cerebellum D) medulla
Charles Darwin and his son experimented with which plant growth response?
A. phototropism B. circadian rhythms C. heat shock D. gravitropism E. thermotropism
Which of the following substances is mismatched with its role?
a. Most B vitamins - coenzymes b. Vitamin A - incorporated into visual pigments c. Iron - component of thyroid hormones d. Vitamin D - aids in calcium absorption e. Phosphorus - bone formation, nucleotide synthesis