What happens to the protons received from NADH in bacteria?
Answer: They are transported across the cytoplasmic membrane, setting up a proton motive force
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The double helix model of DNA structure was proposed by
A. Watson and Crick. B. Griffith. C. Avery. D. Franklin. E. Chargaff.
Answer the following statements true (T) or false (F)
1. When lactose becomes available the genes encoding b-galactosidase and lactose permease are upregulated in E. coli. 2. Different globin polypeptides are expressed at similar levels during the embryonic and fetal stages of mammalian development. 3. Small effector molecules directly bind the DNA they regulate. 4. Both eukaryotes and prokaryotes require a promoter region for gene transcription. 5. A cis-effect is a form of gene regulation that can occur between two DNA segments that are not physically adjacent.
Which system is considered a closed system?
a. a human b. a gas-powered automobile c. a single-celled organism d. a propane furnace e. the Earth
Match the nutritional category of microbe to its source of carbon and its energy source.
Photoautotroph A) Carbon dioxide and simple inorganic chemicals B) Organic carbon and metabolic conversion of the nutrients from other organisms C) Organic carbon and sunlight D) Carbon dioxide and sunlight