Bacteria group their genes such that they share a single promoter and the mRNA transcript synthesizes several different polypeptides. Collectively, these are referred to as ________ mRNAs, which are part of the operon system
Fill in the blank(s) with correct word
polycistronic
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________ are genetically engineered proteins that allow cytosolic calcium fluxes to be observed by an increase in fluorescence.
Fill in the blank(s) with the appropriate word(s).
In pea plants, the allele for tall (T) is dominant to the allele for short (t). The genotype for a short pea plant is ________.
A) Tt B) tt C) Tt or tt D) TT or tt
The main phenomenon that increases the efficiency of gas exchange in fish gills is the
A. back-and-forth movement of water that maximizes oxygen uptake. B. high degree of oxygen saturation of water. C. very high blood pressure found in the circulatory system of fishes. D. co-current exchange mechanism. E. countercurrent exchange mechanism.
Which element is not one of the four most common elements found in organisms?
a. hydrogen b. oxygen c. carbon d. helium e. nitrogen