Answer the following statements true (T) or false (F)
1. Friedrich Wöhler refuted the scientific concept of vitalism during the early 1800s by proving that organic molecules could be synthesized outside a living organism.
2. Because carbon and hydrogen share similar electronegativities, they will form nonpolar covalent bonds with each other.
3. Macromolecules such as lipids and carbohydrates are produced from monomers through condensation reactions.
4. The sole function of carbohydrates is to serve as energy stores.
1. TRUE
2. TRUE
3. TRUE
4. FALSE
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Molecules that have both hydrophilic and hydrophobic components are referred to as ____
Fill in the blank with the appropriate word.
In a series of field experiments, David Tilman and colleagues investigated biodiversity and ecosystem function. They found a relationship between
A. ecosystem diversity and species richness. B. ecosystem function and genetic diversity. C. species diversity and genetic diversity. D. species diversity and ecosystem function.
Which of the following is true about the bacterium P. aeruginosa?
a. It contains many mitochondria because it actively divides. b. It has a cell wall. c. All its genetic material is contained in a circular plasmid. d. It is a eukaryote
Which of the following describes the Lac operon in E. coli when both lactose and glucose are present in the culture medium?
A. The Lac repressor, but not CAP, is bound to the Lac operon's regulatory DNA, and the Lac operon is not expressed. B. Neither CAP nor the Lac repressor is bound to the Lac operon's regulatory DNA, and the Lac operon is not expressed. C. CAP and the Lac repressor are both bound to the Lac operon's regulatory DNA, and the Lac operon is not expressed. D. CAP binds to the Lac repressor, preventing it from binding to the Lac operon's regulatory DNA, and the Lac operon is expressed. E. CAP, but not the Lac repressor, is bound to the Lac operon's regulatory DNA, and the Lac operon is expressed.