The dissociation constant (Kd) of a receptor is:  BIOCHEMISTRY basic  the concentration of a ligand that produces 100% occupancy of the receptor  the concentration of a ligand that produces 50% of the maximal effect.  the measurement of specificity between ligand and its receptor.  the measurement of speed by which a ligand will dissociate from its receptor.  the measurement of affinity between a ligand and its receptor and the inverse of the association constant.

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 The dissociation constant (Kd) of a receptor is: 

BIOCHEMISTRY basic 

• the concentration of a ligand that produces 100% occupancy of the receptor 
• the concentration of a ligand that produces 50% of the maximal effect. 
• the measurement of specificity between ligand and its receptor. 
• the measurement of speed by which a ligand will dissociate from its receptor. 
• the measurement of affinity between a ligand and its receptor and the inverse of the association constant. 

During an experiment with Drosophila, it was discovered that all females had red eyes. unlike males. A conclusion based on this observation would be:

MOLECULAR BIOLOGY basic 

• The gene for eye color is located on the X chromosome.
• The females are homozygotes
• The gene for eye color is dominant.
• The eye color results from multigenic linkage.
• The eye color phenotype is sex-linked 

A secondary lysosome:

CELL BIOLOGY advanced 

• a lysosome that provides a backup to the primary lysosomes 
• a lysosome that is smaller than a primary lysosome 
• a lysosome that will become a primary lysosome when it fuses with a phagosome 
• a primary lysosome that has fused with a phagosome. 
• a lysosome that has exocytosed.