A ____________ metabolizes the organic matter of dead organisms.
A) parasite
B) saprobe
C) photoautotroph
D) all of the above
Ans: B) saprobe
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If a microbe is said to "ferment sugar", this means that the microbe is breaking down a sugar for energy.
a. True b. False
In the Hershey and Chase experiment, phage-infected bacteria and viral progeny were radioactive following bacterial
infection with 32P-labeled viruses. Why?
a. Bacteria had incorporated radioactive proteins into their DNA. b. Bacteria and viral progeny had incorporated 32P into their DNA. c. Viral progeny had used the 32P to build new viral proteins. d. Bacteria had incorporated radioactive proteins into their cell membranes. e. 32P was left outside the cell during viral infection.
A miRNA’s normal job is to inactivate a tumor suppressor gene. If this miRNA is made in abnormally
high amounts,
a. the cell will become cancerous b. the tumor suppressor gene will be overactive c. the cell will not express the tumor suppressor gene as highly as it should d. the cell will stop growing e. the cell will begin to differentiate
A hydrolysis reaction results in
a. formation of a macromolecule. b. bond breakage of a macromolecule. c. lipid molecule creation. d. nucleic acids being made. e. most macromolecules.