DNA contains ____ nucleotides; they are _____________.
A) 4; adenine, cytosine, uracil, and guanine
B) 4; adenine, cytosine, thymine, and guanine
C) 20; tryptophan, alanine, glycine, methionine, and 16 others
D) 3; glucose, fructose, and lactose
E) 2; saturated and unsaturated
B) 4; adenine, cytosine, thymine, and guanine
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Four of the five hormones listed below affect blood
glucose level. Select the exception. a. calcitonin b. glucagon c. glucocorticoid d. insulin e. epinephrine
During enzyme-linked reception, signal molecules bind to two tyrosine kinase receptors. The receptor proteins move
closer together in the plasma membrane and pair, forming a(n) ____. a. gate b. dimer c. pathway d. polypeptide chain e. protein kinase cascade
How is summation related to IPSPs and EPSPs? What is the difference between temporal summation and spatial
summation? What will be an ideal response?
Examine the picture to answer the following questions and identify the labeled structures. 
A:________B:________C:________D:________E:Is the neuron pictured a sensory, association or motor neuron? What is its function?F:Is the neuron multipolar or unipolar? Explain your answer.
What will be an ideal response?