Which group of organisms is most likely to have mercury or some other organic pesticides in its tissues in a high quantity?
a. Moss
b. Clams
c. Algae
d. Polar bears
e. Sardines
d
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In eukaryotic cells, the oxidation of pyruvate occurs in:
A. the cytoplasm. B. the nucleus. C. the matrix of the mitochondria. D. the endoplasmic reticulum. E. vacuoles.
Which of the following is not correct concerning epistatic interactions?
A. They can be associated with enzymatic pathways. B. They produce variations in the expected 9:3:3:1 ratio of a dihybrid cross. C. They can result when a gene at one locus masks the expression of a gene at a different locus. D. They always result in a 9:7 ratio of a dihybrid cross. E. They are due to gene interactions.
The process in which the intercostal muscles contract, pulling the rib cage upward and outward and causing the lungs to inflate, is called ________
A) inspiration B) expiration C) exhalation D) deflation
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What is the key activity of panel II in the accompanying figure?
A. The enzyme is consumed as the products form. B. The substrate leaves the active site. C. The conversion of substrates to products occurs. D. The product leaves the enzyme. E. The product decomposes to the reactants.