The most common mutation in cystic fibrosis is the deletion of a single amino acid which results in a misfolded
protein.
a. True
b. False
True
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Answer the following statements true (T) or false (F)
1. G proteins and Ras are activated when bound to guanosine diphosphate. 2. One common feature with G-protein coupled, enzyme-linked, and growth factor receptors is that their activation leads to activation of protein kinases. 3. Cyclic AMP activates protein kinase C in producing a cell response. 4. If IP3 binds a Ca2+ ligand-gated ion channel in the endoplasmic reticulum then cytosolic Ca2+ levels will rise in the cell.
All of the following are critical factors for DNA replication on the leading strand EXCEPT?
A. primer B. DNA ligase C. DNA polymerase D. DNA primase E. deoxynucleoside triphosphates
Rubbery cartilage, calcium-hardened bone tissue, lipid-storing adipose tissue, and blood are looked
upon as specialized __________ tissues. Fill in the blank(s) with the appropriate word(s).
Very rapid speciation occurred when cichlid fishes were isolated in Lake Victoria. Widespread extinction was dramatically seen when
A. hybridization stopped. B. predatory fish were added. C. fishing was prohibited. D. artificial selection stopped. E. insect larvae stocks were depleted.