The potential damaging effects of free radicals to DNA can be averted by ________
Fill in the blank(s) with correct word
antioxidants
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Pressure that a fluid exerts against a structure that contains it is called:
a. hypertonic b. pressure gradient c. osmosis d. turgor e. isotonic
Certain cell types in humans, such as skeletal muscle cells, have several nuclei per cell. Based on your
understanding of mitosis, how could this happen?
a. The cell undergoes repeated cytokinesis but not mitosis. b. The cell undergoes repeated mitosis with concomitant cytokinesis. c. The cell undergoes repeated mitosis but not cytokinesis. d. The cell undergoes anaphase twice before entering telophase. e. The cell goes through multiple S phases before entering mitosis.
What structures form the subunits of ribosomes?
A) mRNA and DNA B) tRNA and mRNA C) rRNA and proteins D) DNA and proteins
The Archaea generally lack which of the following that are normally found in Gram-negative bacteria?
A. a complex peptidoglycan network B. outer membrane C. lipopolysaccharide D. All of the choices are correct.