The manner in which a species obtains food, the relationship it has with other species and the services it provides to the community are all part of its ecological __________.
Fill in the blank(s) with the appropriate word(s).
Niche
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Consider the following two half reactions:NAD+ + H+ + 2e- ? NADH Eo (volts) = - 0.32Pyruvate- + 2H+ + 2e- ? lactate 2- Eo(volts) = - 0.19In a redox reaction involving NAD/NADH and pyruvate, ________ will be the electron donor and ________ will be the electron acceptor.
A. pyrvuate; lactate B. NADH; pyruvate C. lactate; pyruvate D. NAD+; pyruvate
Which group of organisms is thought to be responsible for the corrosion of submerged metal structures and oil pipelines?
A) fermentative microorganisms B) acidophilic iron-oxidizers C) sulfate reducers D) hydrocarbon-degrading anaerobes
Cellular structures that function in movement and consist of numerous short hairlike extensions from the cell are called ________
Fill in the blank(s) with correct word
Is the lac operon transcribed when lactose is present?
A. Yes, lactose is converted to another sugar that binds to the repressor, freeing the promoter region. B. Yes, lactose binds to RNA polymerase, allowing it to bind to the promoter and transcribe the operon. C. No, lactose is converted to another sugar that binds to the two operators preventing transcription. D. No, lactose has no effect on transcription of the lac operon. E. No, lactose binds to the second operator, blocking transcription by RNA polymerase.