Patterns of histone methylation and acetylation are thought to provide a ____ code that affects chromatin structure and gene transcription
Fill in the blank with the appropriate word.
histone
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Why do electron microscopes have the ability resolve such small objects?
a. Because electrons have a much shorter wavelength than the photons of visiblelight b. Because electrons have a much longer wavelength than the photons of visiblelight
Which of the following does NOT describe
some aspect of polysaccharides? a. energy storage b. straight or branched chain c. glucose subunits d. contain only carbon, hydrogen, and oxygen atoms e. produced by condensation reactions
How does a cell rid itself of defective or malfunctioning organelles?
A) Ribosomes remove malfunctioning organelles by degrading the parts. B) The organelles are engulfed by plastids and stored. C) Defective organelles accumulate until the cell itself dies. D) Lysosomes assist in the removal of defective organelles by digesting them. E) The organelles are exported by phagocytosis.
Herd immunity fails if at least what percentage of a population is unvaccinated?
A) 1% B) 5% C) 10% D) 20%