Genetically speaking, humans share roughly what percent of DNA sequences with gorillas?
a. 99%
b. 98%
c. 95%
d. 90%
e. 88%
b
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A 76-year-old man with intermittent fevers has blood cultures drawn three times. The second set is positive and grew out of a Corynebacterium spp. This organism is considered:
a. pathogenic. b. virulent. c. a contaminant. d. normal flora.
If anaerobic pathways follow glycolysis,
a. CO2 will be one of the products as pyruvate is converted to lactate. b. the two NADH molecules produced during glycolysis will (depending on the organism) be used to reduce pyruvate to either lactate or ethanol and CO2. c. ATP will be required to convert pyruvate to either lactate or ethanol and CO2. d. oxidative phosphorylation occurs either on the plasma membrane or on derivatives of the plasma membrane. e. none of these will occur.
A change in a regulatory gene
A. can increase or decrease the expression of a structural gene. B. is always beneficial to the organism in which it occurs. C. is what happens in the production of sickle-cell hemoglobin. D. must be dominant to be effective.
Gaucher disease is the most common of lipid storage diseases in humans. It is caused by a deficiency of an enzyme necessary for lipid metabolism
This leads to a collection of fatty material in organs of the body including the spleen, liver, kidneys, lungs, brain, and bone marrow. Using your knowledge of the structure of eukaryotic cells, identify the statement below that best explains how internal membranes and the organelles of cells would be involved in Gaucher disease. A) The mitochondria are most likely defective and do not produce adequate amounts of ATP needed for cellular respiration. B) The rough endoplasmic reticulum contains too many ribosomes which results in an overproduction of the enzyme involved in carbohydrate catalysis. C) The lysosomes lack sufficient amounts of enzymes necessary for the metabolism of lipids. D) The Golgi apparatus produces vesicles with faulty membranes that leak their contents into the cytoplasm of the cell.