Packaged DNA is referred to as
a. chromosomes.
b. histones.
c. chromatin.
d. protein.
e. nucleosomes.
C
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All EXCEPT which of these features of Giardia
lamblia is correct? a. parabasalid b. lack mitochondria c. common intestinal parasite of mammals d. anaerobic e. forms cysts that survive in water contaminated with feces
Identify two plant macronutrients and two micronutrients and provide a physiological role for each. What will be an ideal response?
A centrosome is
a. a cylindrical structure made up of nine triplets of microtubules. b. a chromosomal region that connects sister chromatids during mitosis and attaches them to the spindle. c. a protein structure that binds centromeres and mediates the attachment of chromosomes to the spindle. d. the major microtubule-organizing center in animal cells.
The bond between an oxygen atom and a hydrogen atom would be categorized as:
a. hydrogen bond b. non-polar covalent bond c. ionic bond d. polar covalent bond