Which of the following correctly lists organization levels from the simplest to the most complex?
a. atoms, organelles, cells, tissues, organs
b. atoms, molecules, tissues, organelles, organisms
c. molecules, atoms, cells, organelles, tissues
d. molecules, cells, organelles, organisms, organs
a. atoms, organelles, cells, tissues, organs
The organization levels from the simplest to the most complex are atoms, organelles, cells, tissues,
and organs.
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Working with intentionally mutated cells, you come across a cell that seems to be struggling with transcription of a gene with a distant enhancer. Further examination shows that the enhancer region for this gene is several thousand base pairs away but fully intact. However, for this enhancer to interact with the core promoter, it requires assistance. Given that this assistance has failed, which proteins are likely to be mutated?
a. distal control elements b. RNA polymerase c. DNA bending proteins d. core promoter sequence
You are a famous endocrinologist and are presented with a case in which a genetically determined male (XY) exhibits secondary female characteristics, including breast development and lack of facial hair growth
What may you hypothesize about this patient? A) He may lack receptors for testosterone. B) He may have a tumor in his testes causing an overproduction of testosterone. C) He may be abusing steroids. D) He may actually be perfectly healthy and normal.
Which of the following is true of normal microbiotia, but not of transient macrobiotic?
A) Normal microbiota are opportunistic pathogens. B) Normal microbiota are on the human body. C) Normal microbiota cause disease. D) Normal microbiota are permanently present.
Animals that have no circulatory system, such as flatworms, rely on _______to deliver nutrients and gases to their tissues.
A. diffusion B. osmosis C. hemolymph D. the lymphatic system E. the coelom