Bacteria containing recombinant plasmids are often identified by which process?
A. removing the DNA of all cells in a culture to see which cells have plasmids
B. examining the cells with an electron microscope
C. exposing the bacteria to an antibiotic that kills the cells lacking the plasmid
D. producing antibodies specific for each bacterium containing a recombinant plasmid
E. using radioactive tracers to locate the plasmids
Ans: C. exposing the bacteria to an antibiotic that kills the cells lacking the plasmid
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Answer the following statements true (T) or false (F)
1. Photosynthesis in plants occurs in chloroplasts. 2. The Endosymbiosis Theory best describes the origins of peroxisomes in eukaryotes. 3. In eukaryotes, most proteins contain short stretches of amino acid sequences called sorting signals which direct the protein to the correct cellular location. 4. The first step in cotranslational sorting is the peptide is directed to the endoplasmic reticulum. 5. Chaperones keep proteins destined for the mitochondrial matrix in their three dimensional active structure.
The two continents that suggested continental drift are called:
a. North and South America. b. North America and Europe. c. South America and Africa. d. Europe and Asia. e. Australia and India.
Gene regulation can involve a protein repressor that blocks ________ from initiating transcription.
A. rRNA B. RNA polymerase C. DNA polymerase III D. DNA polymerase I E. mRNA
Which of the following is NOT associated with
Marfan syndrome?
a. skin lacking elasticity b. loose joints c. weakened aorta d. short stature e. mutated fibrillin gene