Which step in the evolution of life is the most complex and probably occurred last?
a. formation of DNA
b. formation of protein-RNA systems
c. formation of membrane-bound proto-cells
d. spontaneous formation of organic compounds under abiotic conditions
e. formation of ATP
ANSWER: c
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(a) your left. (b) the pig’s left. (c) the pig’s right. (d) both a and c.
Match the group of proteins on the left with an example from that group on the right.
A) spectrin B) CapB C) CapZ D) alpha E) Tau F) kinesin 1) motor MAP 2) nonmotor MAP 3) capping protein 4) linker proteins
Oxygen concentrations are relatively high in the bottom ooze of lakes and ponds
Indicate whether the statement is true or false
Leukemia is a type of cancer that involves the uncontrolled division of ____________________ cells. Fill in the blank(s) with the appropriate word(s)