Long structures used for cell movement are
A. centrioles.
B. cilia.
C. flagella.
D. granules.
C. flagella.
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Where is the response element found in eukaryotic genes?
A. 10 to 20 base pairs downstream from the transcriptional start site B. 50 to 100 base pairs downstream from the transcriptional start site C. 50 to 100 base pairs upstream from the transcriptional start site D. 10 to 20 base pairs upstream from the TATA box E. 500 to 10,000 base pairs from the enhancer site
Adrenoleukodystrophy (ALD) is a fatal disease that results from the inability of liver cells to transport very long chain fatty acids (VLCFAs) across the peroxisomal membrane. It is diagnosed by the presence of high levels of VLFCAs in the blood. The disease results in destruction of brain myelin leading to progressive cognitive impairment, coma, and death by the age of 14. ALD is an X-linked recessive condition, and there has never been a case of ALD described in girls. You have just started your internship at the Mayo clinic and a 10-year-old girl comes in who is in a coma and having seizures. Blood tests show she has extremely elevated levels of long-chain fatty acids. This looks like ALD, but a girl has never been afflicted. When you go to your supervisor to give your diagnosis, which
of the following hypotheses do you present to support it? A. The patient's mother and father are both recessive carriers of ALD. B. Most of the Barr bodies in the patient's liver have a normal peroxisome gene. C. The patient's mother is a carrier for ALD. D. The patient has Turner syndrome. E. The patient's mother is a carrier, and the young girl has either only genetically normal Barr bodies in the liver or the girl has Turner syndrome.
In the figure above, the two strands have
separated in step "b" because
a. the sugar-phosphate bonds were broken. b. the hydrogen bonds between bases were broken. c. energy from primers pushed the bases apart. d. the bases, being negatively charged, repelled each other. e. proteins were inserted between each pair of bases.
Please match the description to the correct group of microorganisms. Molds and yeasts
A) Algae B) Viruses C) Bacteria D) Protozoa E) Fungi F) Helminths