When a mutation disrupts or stops synthesis of a one of the globin chains of hemoglobin, the resulting disorder is called ________

a. iron-deficiency anemia
b. beta-thalassemia
c. polycythemia
d. leukemia


b

Biology & Microbiology

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Which of the following is NOT synthesized from a DNA template?

A) messenger RNA B) amino acids C) tRNA D) ribosomal RNA

Biology & Microbiology

Why are telomeres a necessary component of linear chromosomes?

A. They direct where DNA synthesis will begin. B. They fix mistakes that are made during DNA replication. C. They extend the life of cells because DNA is shortened every time it is replicated. D. They direct where DNA synthesis will end. E. None of the answer options are correct.

Biology & Microbiology

In the future, it may be possible to screen for a number of different types of cancer by a simple blood test. If a blood test indicates a very early stage of lung cancer, where is the most likely place that the tumor will be growing?  

A.  in the parietal pleural membrane B.  in the wall of a large bronchus C.  in the visceral pleural membrane D.  in the wall of an alveolus E.  in the wall of a pulmonary vein

Biology & Microbiology

What term is used to indicate the ability of a cancer to invade other parts of the body and to produce secondary tumors?

a. Angiogenesis b. Metastasis c. Carcinogenesis d. all of the above

Biology & Microbiology