The monomer subunit of immunoglobulin molecules has all of the following except
A. a variable and constant region on each polypeptide chain.
B. disulfide bonds between polypeptide chains.
C. four antigen binding sites.
D. two identical heavy polypeptide chains.
E. two identical light polypeptide chains.
Answer: C
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Phylogenetic stains, such as those used in FISH, hybridize with
A) ribosomal RNA. B) mitochondrial DNA. C) nuclear DNA. D) RNA polymerase.
Approximately how much of the human genome varies between individuals?
A. 99.9% B. 97.0% C. 50.0% D. 3.0% E. 0.1%
Stereocilia are important for the function of:
A. statocysts. B. lateral line systems. C. vestibular systems. D. All of the answer options are correct.
What structural element that is inserted into the major groove of DNA, where it recognizes specific DNA base pair sequences lining the groove, appears to be common to many DNA-binding motifs?
a) a ?-pleated sheet b) an ?-helix c) a double helix d) a random coil