Which of the following is true about phospholipid bilayers?
A. The hydrophobic head faces the cell exterior.
B. The polar heads face the cell interior and exterior.
C. The hydrophobic tail faces the cell interior.
D. The polar tails face the cell interior and exterior.
E. The interior of the layer is highly hydrophilic.
Answer: B
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When selecting among multiple possible phylogenetic trees that fit our data, we use the principle of ____ , which means we choose the ____ possible hypothesis
In phylogenetic analysis, that means selecting the tree that represents the ____ evolutionary changes or mutations. Fill in the blank with the appropriate word.
Which of the following may lead to cancer?
A. Tumor supressor genes B. Oncogenes C. Viruses D. Mutation E. All of the above, except (A), may lead to cancer
Treponema pallidum can be transmitted
A) by contact with infected fomites. B) through sexual intercourse. C) from an infected mother to her unborn child. D) both by contact with infected fomites and through sexual intercourse. E) both through sexual intercourse and from an infected mother to her unborn child.
The cytoplasm is not considered a cellular organelle.
Answer the following statement true (T) or false (F)