These structures are held together by cohesin
A. homologous chromosomes.
B. sister chromatids.
C. solenoids.
D. nucleosomes.
Answer: B
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The major inhibitory neurotransmitter of the human brain is _____
A) acetylcholine B) epinephrine C) glutamate D) nitric oxide E) gamma-aminobutyric acid (GABA)
Robert Koch contributed to the field of microbiology by being the first person to
A) develop the tuberculin test. B) formulate four postulates for definitively linking a specific microorganism to a specific disease. C) use agar as a solidifying agent in growth media. D) develop the tuberculin test, formulate four postulates for definitively linking a specific microorganism to a specific disease, and use agar as a solidifying agent in growth media.
The most prominent water-borne pathogens of recent times include all of the following except ______.
A. Staphylococcus B. Salmonella C. Norwalk viruses D. Cryptosporidium
Where are the proteins needed for photosynthesis produced? (Select all that apply.)
A) in the cytoplasm B) in the chloroplasts C) in the nucleus D) in the mitochondria