____ is a technique that can be used to separate DNA molecules on the basis of their size
a. Separation gradient
b. Electrophoresis
c. Selective sorting
d. Cloning
e. PCR
b
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Answer the following statements true (T) or false (F)
1. Phylogenetic analyses of some vertebrate mineralcorticoid and glucocorticoid receptors and their ligands has suggested that the hormones evolved prior to their receptors. 2. Vasotocin is present in non-mammalian vertebrates and shares structural and functional properties with mammalian antidiuretic hormone and oxytocin. Through these similarities it has been suggested that vasotocin could be the ancestral precursor to the posterior pituitary hormone in vertebrates. 3. Vitamin D is a hormone produced in part by exposure to sunlight. 4. If blood sodium levels rise sharply above normal limits the heart will release more atrial natriuretic peptide.
Phagocytes have general antibody receptors called ________ that bind to any antibody attached to an antigen
A) antigens B) antigen receptors C) Fc receptors D) membrane detectors
An objective function is best described as:
A. a function ultimately wished to be maximized or minimized. B. the function relating the degree of support for a sufficient statistic. C. the function that determines the degree of freedom. D. the line associating how treatment and outcome variables move together.
The FIRST step in the Krebs cycle is combination of an acetyl group with oxaloacetic acid, leading to the formation of
a) lactic acid. b) pyruvic acid. c) citric acid. d) acetyl CoA.