What are alleles?
A. the dominant form of a gene
B. the locations of genes on a chromosome
C. genes for different traits, such as hair color or eye color
D. alternative forms of a gene for a single trait, such as blue eyes or brown eyes
E. the recessive form of a gene
Answer: D
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Bacterial and eukaryotic replication have many similarities. Which of the following is not a true comparison?
A. Both form loops with the lagging strand template to accommodate the antiparallel nature of DNA. B. Both incorporate a sliding clamp mechanism in their replication polymerase. C. Both the primase of bacteria and Pol ? of eukaryotes are responsible for primer synthesis and only incorporate ribonucleotides. D. Eukaryotic replication rates are slower than bacterial rates. E. The Okazaki fragments generated in eukaryotes are shorter than those in bacteria.
The addition of excess phosphorus causes lakes to become eutrophic because the nutrients trigger blooms of
photosynthetic cyanobacteria. Why do these blooms cause low oxygen levels in lakes?
a. Cyanobacteria use up more oxygen than they produce. b. Excess phosphorus binds to dissolved oxygen in the water. c. Cyanobacteria are net producers of oxygen while alive, but when they die aerobic bacteria use oxygen while decomposing them. d. Cyanobacterial blooms only occur in waters naturally low in oxygen. e. Cyanobacteria are aerobic heterotrophs, consuming oxygen and producing carbon dioxide.
When cells break down proteins, the main waste product is
a. acetic acid. b. phosphoric acid. c. amino acids. d. carbon dioxide. e. urea.
Common joint injuries
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