As oxygen binds to hemoglobin, the ________ of the hemoglobin molecule will change through a process of ________ such that the binding of oxygen is enhanced.

A) amino acid sequence : phosphorylation
B) cooperativity : negativity
C) affinity : positive cooperativity
D) affinity : negative cooperativity
E) cooperativity : positivity


Answer: C) affinity : positive cooperativity

Biology & Microbiology

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Among other functions, the ____ of a vascular plant performs most of the photosynthesis that is

conducted by the plant.

a. ground tissue b. protoderm c. vascular tissue d. meristem e. dermal tissue

Biology & Microbiology

The situation in which an embryo produced as a result of a mating between individuals of different species is incompatible with the mother and is subsequently aborted is an example of ____

a. temporal isolation b. hybrid inviability c. mechanical isolation d. gametic mortality e. behavioral isolation

Biology & Microbiology

A short-lived contraction of the cells in a motor unit is known as a

a. muscle twitch. b. tetanus response. c. spasm. d. contracture. e. treppe.

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Gammaproteobacteria of the genus (Escherichia/Pseudomonas/Vibrio) catabolize carbohydrates using pathways other than the standard glycolytic (Embden-Meyerhof) pathway.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology