You are working in a medical research lab and have to determine if a patient is heterozygous or homozygous for a particular restriction site
After treating the DNA with a restriction
enzyme that cuts at that site, you subject the sample to gel electrophoresis. How many
bands would be indicative of the heterozygous condition?
A. one
B. two
C. three
D. four
E. Impossible to answer from the information
given.
B
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In bacteria, fungi, and plants the high internal pressure generated by osmosis is counteracted by the mechanical strength of their
A. plasma membranes. B. organelles. C. cytoskeletons. D. cell walls.
. Which of the following flowering plant
structures is most like the dikaryotic hyphae of a fungus?
a. the central cell of a female gametophyte b. the immature male gametophyte c. the egg cell of an ovule d. the endosperm of a seed e. none of these flowering plant structures are like the dikaryotic hyphae of a fungus
Compare and contrast the structure of an herbaceous eudicot stem and that of a monocot. What will be an ideal response?
Recently, a new concept has been introduced in the view of tumors and tumor cells. It suggests that a relatively small number of cells scattered throughout the tumor are responsible for maintaining the tumor and promoting its spread. Such cells are known as ___________.
a) cancer stem cells b) anthropomorphic cells c) tumorific cells d) tumorlogenous cells