The prokaryotic chromosome is

A. held within a membrane-bound nucleus.
B. localized to a nucleoid region.
C. circular and loosely packed.
D. composed of single-stranded DNA.
E. linear and tightly wrapped around histone proteins.


B. localized to a nucleoid region.

Biology & Microbiology

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The early amniotes

a. developed a land egg. b. had a four-chambered heart. c. had lungs equipped with air sacs. d. were bipedal and gave rise to the mammals. e. appeared at the start of the Paleozoic Era.

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The symptoms of HPV can be treated, but there is no cure

Indicate whether the statement is true or false

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Which of the following would you expect to dissolve poorly in water?

A. Anions B. Cations C. A substance with a lot of polar covalent bonds D. A substance with a lot of non-polar covalent bonds

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What are the nodes of Ranvier?

A. breaks in the myelination along an axon B. the population of voltage-gated sodium channels located at the axon hillock C. the point of communication between an axon terminal and a muscle cell D. branch points along an axon

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