Metabolism is a unifying characteristic of all cellular organisms
Indicate whether the statement is true or false.
Answer: TRUE
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The enzyme phosphofructokinase-1 (PFK-1) is thought of as a metabolic "valve" that regulates the rate of glycolysis. Which of the following correctly identifies its allosteric activators and inhibitors and their actions?
A. ADPâ€"activator; ATPâ€"activator B. AMPâ€"activator; CoQâ€"inhibitor C. ATPâ€"activator; AMPâ€"inhibitor D. ADPâ€"activator; citrateâ€"inhibitor E. CoQâ€"activator; citrateâ€"inhibitor
How do cattle digest complex plant polysaccharides like cellulose?
A. They have specialized mammalian enzymes to degrade the bonds of cellulose. B. Bacterial populations in one of the four compartments of their stomachs are able to break the bonds between adjacent glucose units of cellulose. C. Mechanical forces of cud-chewing break the cell walls of plant fibers, enabling the cattle to extract the digestible contents of the cells. D. Acids produced in the stomach degrade cellulose.
Name two forms of recombination in bacteria
A) conjugation and transduction B) insertion and replication C) auxotrophic and prototrophic D) mixed and generalized E) lytic and lysogenic
Which of the following best defines microevolution?
A) Changes in genes between populations B) Changes in genes within a population over time C) Changes in genes that do not change the gene pool over time D) Changes across species but not in genes