The time it takes for half of a radioisotope's
atom to decay is called the
a. decay time.
b. half-life
c. isotopic life
d. release time
e. denature time
B
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________ refers to the removal of an amino group from an amino acid. One mechanism for this removal is ________, in which the amino group is transferred to an acceptor molecule.
A. Deamination; transamination B. Deamination; hydrolysis C. Transamination; deamination D. Hydrolysis; transamination
Plant stem cells are able to do which of the following?
A. They grow into leaves. B. They are mature cells. C. They are located in the developed part of the vascular tissue. D. They are undifferentiated cells that can produce new tissues. E. They are mostly found at the tip of leaves.
The phospholipids of plasma membranes have
a. a hydrophobic head and a hydrophilic tail. b. a hydrophobic head and a hydrophobic tail. c. a hydrophobic head and two hydrophobic tails. d. a hydrophilic head and two hydrophobic tails. e. a hydrophilic head and two hydrophilic tails.
The force exerted outward on a plant cell wall by the water contained in the cell is called ________ pressure
Fill in the blank(s) with correct word