Which of the following statements about generalized transduction is false?
A. "Head full" packaging always places only phage DNA into the phage head during phage packaging in generalized transduction.
B. Generalized transduction always involves lytic phage.
C. Generalized transduction can be used to map bacterial genes.
D. Genes that are close together on the bacterial chromosome will have a relatively large cotransduction frequency.
E. Two recombination events are necessary to integrate the transferred DNA during generalized transduction.
A. "Head full" packaging always places only phage DNA into the phage head during phage packaging in generalized transduction.
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Egg whites consist primarily of water and the protein albumin. When you fry an egg, why does the egg white turn from clear to white?
A. The protein becomes dissociated. B. The protein acquires tertiary structure. C. The protein becomes denatured. D. The protein becomes dehydrated.
What factors cause oxygen to be released from hemoglobin? Select all correct choices
A. a change in the acidity or pH of blood B. an increase in CO2 in the bloodstream C. the formation of lactic acid by muscles D. an increase in aerobic respiration
After energy flows into a food web, it leaves mainly by
a. losses of metabolic heat. b. evaporation. c. conversion to chemical energy. d. waste production. e. convection.
Poikilotherms
A. have the same body temperature as their environment. B. maintain a cold body temperature. C. maintain a constant body temperature. D. are always unicellular organisms.