With respect to DNA structure, polarity means that
A) DNA nucleotides can be either positively or negatively charged.
B) the phosphate backbone of DNA is negatively charged.
C) DNA nucleotides can be charged or uncharged.
D) DNA strands have a 5? direction and a 3? direction.
D) DNA strands have a 5? direction and a 3? direction.
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While observing a new species of seaweed under the microscope, it becomes apparent that the entire organism is one large cell containing several nuclei. Which of the following best describes the organization of this organism?
A. coenocytic B. complex multicellular C. simple multicellular D. filamentous E. eukaryotic
Which of the following could be found in or on the nasal epithelium of mammals?
A. a layer of mucus B. olfactory receptors C. basal cells that give rise to olfactory receptors D. supporting cells between olfactory receptor cells E. All of these choices are correct
M. J. Berkeley demonstrated that the great potato blight of Ireland was caused by a fungus.
Answer the following statement true (T) or false (F)
Cytoplasm and nucleoplasm are fluids found inside the cell. These are called _____ fluids.
Fill in the blank(s) with the appropriate word(s).