Cells that crawl rely mainly on ___________________ to facilitate their movement
A. microtubules
B. microfilaments
C. intermediate filaments
B
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Formylmethionine is the first amino acid in proteins in ____
a. Archaea only b. Bacteria only c. both Archaea and Bacteria d. neither Archaea nor Bacteria e. Archaea, Bacteria and Eukarya
Electron flow may be photoprotective (protective to light-induced damage). Which of the following experiments could provide information on this phenomenon?
A) use mutated organisms that can grow but that cannot carry out cyclic flow of electrons and compare their abilities to photosynthesize in different light intensities against those of wild-type organisms B) use plants that can carry out both linear and cyclic electron flow, or only one or another of these processes, and compare their light absorbance at different wavelengths and different light intensities C) use bacteria that have only cyclic flow and look for their frequency of mutation damage at different light intensities D) use bacteria with only cyclic flow and measure the number and types of photosynthetic pigments they have in their membranes E) use plants with only photosystem I operative and measure how much damage occurs at different wavelengths
In a major protein degradation pathway, a short polypeptide called _______ is attached to a protein to target it for destruction.
a. glutathione b. ubiquinone c. ubiquitin d. KDEL
Frameshift mutation nearly always results in a nonfunctional protein because every amino acid after the mutation is different from what was coded for in the original DNA.
a. true b. false