Gene technology has made it possible for bacteria to express human genes. Why is this possible?
A. Both humans and bacteria share a common genetic language.
B. Both humans and bacteria are composed of eukaryotic cells.
C. Both humans and bacteria are composed of prokaryotic cells.
D. To make it possible for bacteria to express human genes, it is necessary to insert human call machinery into a bacterial host cell along with the gene to be expressed.
A. Both humans and bacteria share a common genetic language.
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Which one of the following is a key advantage that eukaryotic cells have over prokaryotic cells?
A. Eukaryotic cells have a cell membrane, which allows them to ship materials into and out of the cell. B. Eukaryotic cells have ribosomes, which allow them to make more complex proteins. C. Eukaryotic cells have a flexible cytoskeleton, which allows them to change shape and gives them the ability to engulf other materials. D. Eukaryotic cells have a rigid cytoskeleton, which allows them to withstand greater stress. E. None of the answers options is correct.
How is adaptive immunity different from innate immunity?
a. adaptive immunity is specific, while innate immunity is not. b. adaptive immunity has memory, while innate immunity does not. c. adaptive immunity is immediate, while innate immunity is not. d. adaptive immunity is specific, while innate immunity is not; adaptive immunity has memory, while innate immunity does not. e. adaptive immunity has memory, while innate immunity does not; adaptive immunity is immediate, while innate immunity is not.
Hydrogenation is a chemical process that
a. turns liquid oil to solid fats. b. turns amino acids into proteins. c. turns DNA into lipids. d. creates stable alternative energy sources. e. does none of these
Monocytes leave the marrow via the bloodstream. As they enter tissues, they mature and become
A) granulocytes. B) lymphocytes. C) macrophages. D) neutrophils.