Which statement accurately describes global gene regulation in bacteria?
A) Sigma factors are not involved in gene regulation, only in attachment of the polymerase to the promoter.
B) Alternative sigma factors that recognize different promoters are a mechanism of global gene regulation.
C) E. coli cells devote more energy to the production of ribosomes during stress so that global gene regulation can occur.
D) All promoters are recognized by all sigma factors.
B) Alternative sigma factors that recognize different promoters are a mechanism of global gene regulation.
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During antigen processing in a phagocytic cell, where does the MHC molecule bind antigen?
a. lysosome b. endoplasmic reticulum c. golgi bodies d. cell membrane e. nucleus
Scientists have studied the effects of television watching on the metabolic rate of children and its potential implications for childhood obesity. In a study of 15 obese children and 16 non-obese children, it was found that the metabolic rate of all
children significantly decreased while watching television compared to their metabolic rate when they were at normal rest. The drop was greater for obese children, but the difference in drops between the two groups of children was not statistically significant. What is a reasonable conclusion to draw from this study? A) Television watching does not contribute at all to childhood obesity. B) Television watching likely contributes to adult obesity but not childhood obesity. C) Television watching contributes more to childhood obesity than the overconsumption of sugary foods. D) Television watching is an activity that should be carefully considered when studying factors that may affect childhood obesity.
Hydrogen bonds may form between oxygen of one water molecule and ________ of another water molecule
Fill in the blank(s) with correct word
Name three covalent modifications that can be made to an RNA molecule in eukaryotic cells before the RNA molecule becomes a mature mRNA
What will be an ideal response?