passive transport requires metabolic energy

a. true
b. false


b. false

Biology & Microbiology

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In the absence of a repressor, where will RNA polymerase bind to a prokaryotic operon to initiate transcription?

a. transcriptional start site b. operator c. promoter d. coding region

Biology & Microbiology

Which macronutrient is the major source of energy for cell processes?

A) carbohydrates B) proteins C) fats D) water

Biology & Microbiology

During a drought on the Galapagos islands, finches with larger beaks were able to crack the large tough seeds produced by plants that survived the dry conditions.  This is an example of ________.

A. stabilizing selection B. a founder effect C. directional selection D. disruptive selection E. genetic drift

Biology & Microbiology

________ use electrons from reduced inorganic or organic compounds as a source of energy and CO2 as a source of carbon.

a) Photoautotrophs b) Photoheterotrophs c) Chemoautotrophs d) Chemoheterotrophs

Biology & Microbiology