How do stem cell studies relate to the process of cell differentiation in an embryo?
What will be an ideal response?
It is thought that if you harvest cells before cell differentiation takes place, perhaps these cells could be
"convinced" to form replacement cells for any necessary location in the body.
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Zhang and Cech’s experiments confirmed what feature of ribozyme activity?
a. Ribozymes inhibit rates of biological reactions. d. Ribozymes can link amino acids together even if their proteins are removed. b. Ribozymes catalyze formation of the fundamental linkage tying amino acids together in proteins. e. Ribozymes provide the possible solution of whether proteins or nucleic acids come first in evolution. c. Ribozymes catalyze formation of the fundamental linkage tying nucleic acids to proteins.
Which of the following is TRUE of fungi?
a. Fungi include molds, yeasts, and mushrooms. b. In multi-celled fungi, cells are organized in structures called mycelia. c. All fungi produce spores. d. All fungi are decomposers. e. All of these are true
DNA replication is ____.
A. redundant B. semiconservative C. progressive D. conservative E. repetitive
Which of the following diseases are you NOT likely to get from an arthropod vector?
a. none of the answers are correct (all of the organisms come from arthropods) b. Lyme disease c. schistosomiasis d. malaria e. plague