This portion of the graph shows the activation energy when there is an enzyme
a. A
b. B
c. C
d. W + X
e. Y + Z
B
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Oligotrophic organisms do NOT grow well under nutrient-replete conditions
Indicate whether the statement is true or false.
According to your text, how many classes of IFs exist?
The proteins of intermediate filaments (IFs) are tissue-specific. Unlike microtubules or microfilaments, the amino acid composition of intermediate filaments varies from tissue to tissue. IFs are classified by the cell type or tissue in which they are found.
The most important feature that permits a gene to act as a molecular clock is _____
A) a large number of base pairs B) being acted upon by natural selection C) a reliable average rate of mutation D) a recent origin by a gene-duplication event
How is Listeria monocytogenes capable of spreading in the body?
A) The bacteria initiate apoptosis in the cell and spread to other cells in the vesicles that are released from the dying cell. B) After being phagocytized, the bacteria initiates apoptosis in the cell and spreads to other cells in the vesicles that are released from the dying cell. C) Actin in the cytoskeleton propels the bacteria into an adjacent cell. D) It evades the immune system by adhering to cells, being phagocytized, and then breaking out of the phagosome into the cytoplasm. E) The bacteria initiate apoptosis in the cell and spread to other cells in the vesicles that are released from the dying cell, and actin in the cytoskeleton propels the bacteria into an adjacent cell.