Which of the following is not part of the bacterial degradosome?
a. an accessory enzyme
b. PNPase
c. a 5? to 3? exonuclease
d. a helicase
e. RNase E
Ans: c
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Proteins are three dimensional molecules made of strands of amino acids (imagine a ball of string). There are 20 different amino acids used in proteins found in living organisms. Some of these amino acids are polar and others are non-polar. Where would a series of non-polar amino acids most likely be located in a protein that is found in the cytosol of an animal cell?
A. On the surface of the protein B. In the interior of the protein C. At the very top of the protein D. At the very bottom of the protein
Climate experts predict that in the mountains of western North America
a. average temperatures will rise. b. there will be less snow. c. there will be drier forests. d. there will be more intense wildfires. e. all of these.
In the profundal zone of a lake or pond, the rate of photosynthesis exceeds the rate of respiration
Indicate whether the statement is true or false
The ecological footprint of an average Egyptian is greater than that of an average American.
Answer the following statement true (T) or false (F)