Isotopes of an element have the same number of ________ and different numbers of ________

A) protons... neutrons
B) protons... electrons
C) neutrons... protons
D) electrons... protons


A

Biology & Microbiology

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Sigma factor belongs to a general group of proteins called the transcription factors

Indicate whether the statement is true or false

Biology & Microbiology

Cross-bridges form between _____ and _____ during muscular contraction.

A. actin, myosin B. actin, tropomyosin C. myosin, troponin D. myosin, tropomyosin E. troponin, calmodulin

Biology & Microbiology

The intermediate-disturbance hypothesis predicts that the most species rich communities would contain

A. both r- and K-selected species. B. high rates of evapotranspiration. C. predominantly K-selected species. D. intermediate biomass. E. None of the answers is correct.

Biology & Microbiology

Including the membrane of the surrounding vesicle, how many phospholipid (NOT lipopolysaccharide) bilayers should be found around each P. chromatophora's chromatophore, and which one of these bilayers should have photosystems embedded in it?

A) two; innermost B) two; outermost C) three; innermost D) three; outermost

Biology & Microbiology