Much research is being done to increase the nitrogen-fixing ability of plants with root nodules. Why is this an important goal for agricultural researchers?
A) Decreasing the size of nodules will allow plants to fix more nitrogen into their own molecules.
B) Nitrogen is an essential component of the amino acids used to form protein.
C) Increasing the nitrogen-fixing ability of plants will allow them to make better use of nitrogen fertilizers.
D) Removing the bacteria from the root nodules will allow more fixed nitrogen to be available to the plants.
Answer: B
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A. Bioinformatics – use of technology to study and store biological data B. Biochemistry – study of chemical reactions needed for life function, usually at the cellular level. C. Biology – study of life D. Biophysics – study of biological processes through physics
Antibiotics incorporated into the culture medium can
A. select against organisms that have not incorporated the plasmid. B. select against organisms that have incorporated a plasmid not containing the desired gene. C. select against organisms that have not incorporated the plasmid and select against organisms that have incorporated a plasmid not containing the desired gene D. enhance production of recombinant proteins.
Sickle-cell anemia is a human disease that occurs as a result of what type of mutation in the ?-globin gene?
A. silent B. missense C. nonsense D. frameshift E. sense
Energy is required to link a phosphate group to ADP to make ATP. Where does the energy come from?
A) breathing B) vitamins C) enzymes D) food we eat