You discover a bacteria species in a deep ocean sample that can turn olive oil into pure gold. The bacteria do not replicate well at sea level, and one night all of your "Golden" bacteria die. What can you do to possibly retrieve the gold-making gene from the dead Golden bacteria?
A. Transform a live bacterial strain with the Golden bacteria's DNA.
B. Transduce a live bacterial strain with the Golden bacteria's DNA.
C. Transduce the Golden bacteria and then infect a live strain of bacteria with the transducing virus.
D. There is nothing you can do because the cells are dead. You will have to search the ocean and hope to find the elusive bacteria again.
E. Conjugate a live bacterial strain with the Golden bacteria.
Answer: A
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Starting from the outside and moving in toward the center, which gives the correct order of tissues in
the stem of a young tree?
a. secondary phloem, primary phloem, primary xylem, secondary xylem b. primary xylem, secondary xylem, secondary phloem, primary phloem c. primary phloem, secondary xylem, secondary phloem, primary xylem d. secondary phloem, primary xylem, secondary xylem, primary phloem e. primary phloem, secondary phloem, secondary xylem, primary xylem
Considering the human body as an ecosystem, which of the following statements is incorrect?
A. Microbes act as producers, consumers, and decomposers within the human ecosystem. B. The human ecosystem lacks an autotrophic niche. C. The microbiota in the human gut is comprised of heterotrophs. D. Energy for the human microbiome derives exclusively from the food we eat.
The bacterial species Gemmata obscuriglobus can withstand high levels of radiation because ____
a. it has a membrane around its DNA b. its DNA is extra stable c. it is protected from the radiation by chloroplasts d. its Golgi bodies decontaminate the cell e. its circular DNA is inherently stable