Respiratory proteins such as __________ in red blood cells and __________ in muscle bind oxygen and help maintain

gradients that favor gas exchange. Fill in the blank(s) with the appropriate word(s).


ANSWER: hemoglobin; myoglobin

Biology & Microbiology

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Metabolic pathways that build cellular molecules are

1.catabolic pathways. 2.exergonic pathways. 3.anabolic pathways. 4.at equilibrium. 5.biological pathways.

Biology & Microbiology

If the heterozygous genotype is favored (as exhibited by the sickle cell allele in malaria-prone regions), selection results in a ________ in which alleles reach stable equilibrium frequencies that are maintained by the ongoing action of selection

against the homozygous genotypes. Fill in the blank(s) with correct word

Biology & Microbiology

Which biome is characterized by large, grazing mammals?

A) chaparral B) temperate grassland C) desert D) temperate forest

Biology & Microbiology

Which of the following statements about the Ey transcriptional regulator is false?

(a) Expression of Ey in cells that normally form legs in the fly will lead to the formation of an eye in the middle of the legs. (b) The Ey transcription factor must bind to the promoter of every eye-specific gene in the fly. (c) Positive feedback loops ensure that Ey expression remains switched on in the developing eye. (d) A homolog of Ey is found in vertebrates; this homolog is also used during eye development.

Biology & Microbiology