Which test provides an operational definition of a gene?
a. complementation test
b. biuret test
c. gram stain
d. neurospora test
e. fluctuation test

The correct option is: A) Complementation test

Explanation:

Complementation test is used for determining that the mutations in the two strains, associated with a particular phenotype, are present in different genes.

The mutations are said to be complementary, if present in different genes.

Therefore, the complementation test is the process for determining the function of the gene in recessive allelism.

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.