Which is incorrect about histoplasmosis?
A. It is transmitted by inhalation of spores.
B. It never spreads to sites outside the respiratory tract.
C. Chronic cases have symptoms similar to tuberculosis.
D. It causes respiratory infections that range from mild to severe.
E. The pathogen grows inside macrophages.
Answer: B
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Although most metabolic reactions are freely reversible, a few irreversible catabolic steps are bypassed during biosynthesis with special enzymes that catalyze the reverse reaction in order to allow for independent regulation of catabolic and anabolic pathways.
Answer the following statement true (T) or false (F)
Many proto-oncogenes encode ____
a. growth inhibiting factors b. intracellular receptors
c. tumor suppressor proteins d. receptors for growth inhibiting factors e. growth factors
Analysis of DNA fragments in gel electrophoresis is based on
A. DNA having an overall negative charge and moving to the positive pole. B. DNA fragments being stained so that they can be seen. C. application of an electric current through the gel causing DNA fragments to migrate. D. larger fragments moving slowly and remaining closer to the wells. E. All of the choices are correct.
During cellular respiration:
a) oxygen is used to transport chemical energy throughout the body b) metabolic oxygen is produced c) light is converted to kinetic energy d) ATP is converted to water and sugar e) energy from the chemical bonds of food molecules is captured