Because DNA strands are antiparallel, DNA replication at a single replication fork proceeds


A) continuously on both strands.

B) continuously on one strand and discontinuously on the other.

C) discontinuously on both strands.

D) continuously on both strands for a time and then discontinuously.


B) continuously on one strand and discontinuously on the other.

Biology & Microbiology

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The innermost membrane layer surrounding the brain and spinal column is the:

a. dura mater. b. meninges. c. arachnoid. d. pia mater.

Biology & Microbiology

Kuru is a degenerative disease of the central nervous system believed to be caused by which type of agent?

A) virus B) bacterium C) prion D) viroid E) protozoan

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Blood calcium homeostasis is maintained by?

a. Calcium excreted or withheld by the kidneys b. Hormones that cause cells to deposit or absorb calcium on/from the bones c. Fat cells that excrete calcium via exocytosis d. liver hormones which remove or add calcium from/to the bloo

Biology & Microbiology

Respond to the following statements with reference to the five biomes listed below.

A. Permafrost acts as a barrier that prevents drainage. B. Variable daily temperatures and plants that are highly resistant to desiccation characterize this biome. C. Their soils are rich, with deep topsoil. D. Needle-shaped leaves help trees shed snow in this biome. E. Grasslands with a few scattered shrubs and trees, home to diverse herbivores as well as carnivores that eat them.

Biology & Microbiology