Which of the following is not true of transposons?
A. can change pigmentation
B. can change the genome
C. can replace damaged DNA
D. can transfer drug resistance
E. are always part of plasmids
Answer: E
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Phylogenies suggest that Anolis lizards colonized Hispaniola:
A. once. B. two or three times. C. four or five times. D. five or six times. E. a dozen times or more.
Rain shadows form on the leeward sides of mountain ranges
Indicate whether the statement is true or false.
Tumor suppressor genes _____.?
a) encode proteins that help prevent uncontrolled cell growth b) are cancer-causing genes introduced into cells by viruses c) are frequently overexpressed in cancerous cells d) often encode proteins that stimulate the cell cycle
Each of the following are true of enzymes except
A. they may or may not require cofactors. B. they increase the activation energy of a reaction. C. they can be used over and over. D. their active site is specific to the substrate. E. All of the choices are true of enzymes.