Gene regulation in eukaryotes is more complicated than bacterial gene regulation. Which of the following describes a gene regulation event that occurs in eukaryotes but not in bacteria?
A) In eukaryotes, mRNA does not need to be modified.
B) In eukaryotes, transcription and translation occur in the same cellular compartment.
C) In eukaryotes, histones must be added or removed to regulate gene expression.
D) In eukaryotes, mRNA degrades quickly compared to bacterial mRNA that is more stable.
E) In eukaryotes, proteins are post-translationally modified, whereas bacterial proteins are never post-translationally modified.
Answer: C
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Which of the following statements is true regarding the vascular cambia of ancient (extinct) lycophytes? Select all correct choices
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A newly developed drug works by blocking thyroid hormone receptors throughout the body. Which of the following would be expected to occur in a patient taking this drug?
A. changes in metabolism B. decreased resorption of bone C. increased uptake of glucose by body cells D. inability to release cortisol E. production of more dilute urine
Define in general terms the origin, insertion, and action of a skeletal muscle organ.
What will be an ideal response?
Which of the following DOES NOT identify a particular advantage in using Arabidopsis to study plant
development and genetics? a. The Arabidopsis genome has been sequenced. b. Arabidopsis mutants can be easily induced with chemicals. c. Many developmental mutants have been identified in Arabidopsis. d. This plant completes its life cycle in just a few weeks. e. It is a weed of no economic importance