Transport of materials through an epithelial cell is called ________.
Fill in the blank(s) with the appropriate word(s).
transcellular transport
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The first eukaryotic genome to be elucidated was from ____
a. Escherichia coli b. Caenorhabditis elegans c. Drosophila melanogaster d. Saccharomyces cerevisiae e. Schizosaccharomyces pombe
As part of the fertilization process, the egg completes meiosis I
____________________ Indicate whether the statement is true or false.
You take a sample of bacteria with DNA that contains only 14N and allow them to replicate in a medium that contains only 15N. After 3 rounds of replication, what percent of the DNA molecules will contain one strand with only 14N and one strand with only 15N? Enter your answer as a whole number without the percent sign. For example, 5% would be entered as 5 and 37% would be entered as 37.
Fill in the blank(s) with the appropriate word(s).
HIV, the virus which causes AIDS, interacts with two receptors on the host cell membrane: CD4 and CCR5. A small percentage of individuals have a genetic mutation which causes their cells to lack CCR5. These individuals will never develop AIDS nor are
they able to pass HIV on to others. Which part of viral replication is being blocked by the lack of a receptor? A) The virus components cannot be assembled into new virions. B) Endocytosis is being prevented. C) Newly assembled virions cannot be released from the host cell. D) The host cell enzymes are unable to replicate the HIV genome. E) HIV cannot attach to the host cell without the proper membrane receptor.