What is one problem associated with using retroviruses as human gene therapy vectors?
A) Their random integration into the host chromosome may result in detrimental mutations.
B) They need to integrate through an RNA intermediate.
C) The level of proteins produced from them is usually very low.
D) The level of proteins produced from them is usually very high.
A) Their random integration into the host chromosome may result in detrimental mutations.
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When oxygen is unavailable during heavy exercise what process do muscle cells use for energy generation?
A. Glycolysis coupled with alcohol fermentation B. Anaerobic respiration C. Aerobic respiration D. Glycolysis coupled with lactate fermentation
All of the following cell types are correctly matched with their functions except
a. mesophyll-photosynthesis. b. guard cell-regulation of transpiration. c. sieve-tube member-translocation. d. vessel element-water transport. e. companion cell-formation of secondary xylem and phloem.
The process of photosynthesis requires the raw materials
A. O2 and H2O. B. CO2 and H2O. C. sugar and CO2. D. H2O and sugar.
The conversion of amino acids to carbohydrates is an example of
A) amination. B) gluconeogenesis. C) substrate-level phosphorylation. D) beta-oxidation. E) electron transport.