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

Biology & Microbiology

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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).

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology

Which element is not one of the four most common elements found in organisms?

a. hydrogen b. oxygen c. carbon d. helium e. nitrogen

Biology & Microbiology