Lactose is composed of _____________ joined by a _____________ linkage
A. glucose and galactose; glycosidic
B. two glucoses; peptide
C. glucose and fructose; glycosidic
D. two amino acids; peptide
E. two galactoses; glycosidic
Answer Key: A
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You are given 100 acres of land and asked to use the land for long-term reduction of atmospheric CO2 levels. Which of the following is the best use of the land for this purpose?
A. Plant a rapidly growing grass that can be harvested every year and used to make ethanol that is added to gasoline. B. Plant slow-growing, bristle-cone pine trees that are known to live for thousands of years and reach a height of about 6 feet. C. Plant corn that is used to feed pigs that are then harvested for sausage meat that is sold at the grocery store. D. Plant a regular lawn and use the land as a park to encourage the local population to exercise more. E. Plant trees that grow rapidly, reach a huge size, and live for a long time.
Which of the following is useful in the identification of bacteria?
A. Hemolytic, metabolic, and fermentative properties B. Source of the culture specimen C. Growth patterns on selective and differential media D. All of the choices are correct.
There is a range of color in mice from black to brown to gray to white. In a region of white sand there is a black volcanic deposit. The white mice survive better on the white sand and the black mice survive better on the black volcanic deposit. This could be an example of
A. sexual selection. B. disruptive selection. C. directional selection. D. stabilizing selection.
What happens to the CFTR gene in individuals who have cystic fibrosis?
a. the entire gene is duplicated b. three bases are duplicated, causing one amino acid to repeat about 40 times c. the entire gene is deleted d. three bases are deleted, causing one acid to be missing