Vectors can transfer ____

a. DNA sequences into bacterial host cells for cloning
b. DNA sequences into viral host cells for cloning
c. cloned viral cells into a bacterial host for cloning
d. cloned mitochondria from donor cell to host cell
e. cloned chromosomes from the nucleus of a cell into its cytoplasm


a

Biology & Microbiology

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Indicate whether the statement is true or false.

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Which of the following is NOT a function of cellular junctions?

A. Cellular junctions hold adjacent cells together. B. Cellular junctions prevent leakage of materials between cell layers. C. Cellular junctions permit the direct exchange of small molecules between cytosol of adjacent cells. D. Cellular junctions bond cells to their ECM. E. Cellular junctions promote the motility of adjacent cells.

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The outbreak of measles within the last few years was due to

A. mutation of the virus. B. change in the environment. C. a decline in vaccination of children in the previous years. D. increase in sensitivity of detection techniques.

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Within a single cell, which of the following is physically the smallest?

A. Nuclear envelope B. Phospholipid molecule C. Cell membrane D. Mitochondrion

Biology & Microbiology