Bacterial cells pick up free pieces of DNA that were secreted by live bacteria or released from dead bacteria in their environment. This process is called
A. conjugation.
B. transduction.
C. infection.
D. replication.
E. transformation.
Answer: E
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Use the following graph and information to answer the question below
Flycatcher birds that migrate from Africa to Europe feed their nestlings a diet that is almost exclusively moth caterpillars. The graph below shows the mean dates of arrival, bird hatching, and peak caterpillar season for the years 1980 and 2000. The shift in the peak of caterpillar season is most likely due to _____. A) pesticide use B) earlier migration returns of flycatchers C) an innate change in the biological clock of the caterpillars D) global warming E) acid precipitation in Europe
A water concentration gradient is influenced by the number of solute molecules present on both sides
of the membrane.
Indicate whether the statement is true or false.__________ is a process where energy (as electrons) is released, whereas __________ is a process
where energy (as electrons) is accepted. a. Reduction; oxidation b. Enthalpy; entropy c. Entropy; enthalpy d. Oxidation; reduction e. Anabolism; catabolism
Starting translation at the authentic (correct) start codon is essential for translation of the correct polypeptide
Errant translation starting at the wrong codon, or even at the wrong nucleotide of the start codon, may produce an abnormal polypeptide and result in a nonfunctional protein. Compare and contrast the mechanisms used by bacteria and eukaryotes to identify the authentic start codon during translation initiation.