Cancer of the colon is caused by
A) a single somatic cell gene mutation.
B) several somatic cell gene mutations.
C) a physical rupture of the colon.
D) a diet high in fiber and low in fat.
Answer: B) several somatic cell gene mutations.
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Which of the following statements about the bicarbonate-carbonic acid buffer system is false? a. Rapid, deep breathing makes the pH of the blood rise
b. Bicarbonate can bind to excess hydrogen ions, preventing blood pH from becoming too acidic. c. None of the choices. d. Carbon dioxide can dissolve in the blood as carbonic acid.
Morgan realized that Bateson and Punnett had detected genetic linkage but they couldn't explain their results because they performed the wrong cross
What type of cross did Morgan use for the analysis of genetic linkage of autosomal genes in Drosophila?
Which of the following is an energy-requiring mode of transport that brings substances into a cell?
A) Osmosis B) Simple diffusion C) Active transport D) Facilitated diffusion
__________ are fairly small organelles that provide a safe place within the cell to carry out certain biochemical reactions that generate harmful, highly reactive oxygen species
These chemicals are both generated and broken down in the same location. (a) Nucleosomes (b) Lysosomes (c) Peroxisomes (d) Endosomes