Oligotrophic organisms do NOT grow well under nutrient-replete conditions
Indicate whether the statement is true or false.
Answer: TRUE
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Which of the following statements best explains why microbial geneticists initially focused on regulation of gene expression at the transcriptional, rather than the translational, level?
A. The process of transcription was best understood by researchers at the time. B. The process of synthesizing an mRNA transcript is much less complex than translation of mRNA into protein. C. Cellular regulation of transcription is common to all prokaryotic cells. D. By regulating the first step of protein synthesis, cells conserve the greatest amount of energy.
On reaching the oocyte, a human sperm cell must pass through what layer(s) before it can fuse with the plasma membrane of the egg?
What will be an ideal response?
Scientists have not yet determined conclusively whether DNA or RNA was the first nucleic acid that evolved on early Earth. Why does this topic interest scientists?
A) It interests scientists because RNA and DNA are the first organic molecules that existed; understanding them is the key to understanding how organic molecules first formed. B) Early cells could not store or pass information to future generations without nucleic acids. C) DNA and RNA are the inorganic precursors to all organic molecules formed on early Earth. D) Miller and Urey found evidence of DNA and RNA in the single amino acids formed in their experiment.
Multiple mitoses followed by a single cytokinetic event is known as
A) meiosis. B) schizogony. C) coenocytic division. D) encystment. E) interphase.