A researcher comes across a plant that has been infected by a pathogen. As a result of the infection, the plant has undergone a systemic acquired resistance (SAR) response and has also generated several siRNAs
Based on this response, what type of pathogen most likely
infected the plant?
A. a bacterium
B. a virus
C. a fungi
D. an oomycete
E. a parasitic plant
B
You might also like to view...
The growth of viruses in a culture is described as a one-step growth curve, because
A) virion numbers show no increase during intracellular replication and can only be counted after the virions burst from the host cell. B) there is only one step in the viral life cycle which leads to only one replicative cycle in a culture. C) assembly and release actually occur in one step. D) the eclipse phase prevents the plating and enumeration of virions although new virions are produced at a steady rate during the eclipse phase.
Which of the following is a major protein found in muscles?
A. Myosin B. Actin C. Both actin and myosin D. Neither actin nor myosin.
The nutritional information on a cereal box shows that one serving of a dry cereal has 200 kilocalories. If one were to burn one serving of the cereal, the amount of heat given off would be sufficient to raise the temperature of 20 kg of water how many degrees Celsius?
A) 1.0°C B) 20.0°C C) 10.0°C D) 2.0°C E) 0.2°C
A culture system with constant environmental conditions maintained through continual provision of nutrient and removal of wastes is called ________ culture system.
A. semicontinuous B. fed-batch C. continuous D. batch