When cytosolic levels of iron increase, intracellular ferritin levels will

A. decrease.
B. not change.
C. increase.
D. fluctuate by increasing and decreasing in a random fashion.
E. drop until iron levels increase further.


C. increase.

Biology & Microbiology

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DNA methylation

A. increases transcription. B. inhibits transcription. C. increases crossover events. D. decreases crossover events. E. promotes post-translational modification of proteins.

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Overall brain size across mammals (e.g., an elephant vs. a bat) is a good predictor of behavioral complexity.

Answer the following statement true (T) or false (F)

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Populations within ecosystems interact in many ways. Some of these interactions affect the evolution of a population. Which ecological interaction is required for natural selection to act on a population?

a) parasitism b) competition c) predation d) mutualism

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The layers of peptidoglycan of the bacterial cell wall can be cross-linked by peptide intrabridges or by direct cross-linking.

Answer the following statement true (T) or false (F)

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