The mutation that causes the lighter skin color of all people of European descent was the result of a ____ in the gene
for a melanin transport protein.
a. base-pair substitution
b. insertion
c. deletion
d. whole chromosome duplication
e. multiple gene mutations involving several mechanisms
a. base-pair substitution
b. insertion
c. deletion
d. whole chromosome duplication
e. multiple gene mutations involving several mechanisms
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Reverse transcriptase is a(n)
A) RNA-dependent DNA polymerase. B) DNA-dependent DNA polymerase. C) RNA-dependent RNA polymerase. D) DNA-dependent RNA polymerase.
Foraminifera are a type of protist that
A. cause malaria. B. are associated with human disease. C. help in estimating the age of ocean deposits. D. move by means of flagella.
Which of the following bacteria is not a common cause of neonatal meningitis?
A) Escherichia coli B) Listeria monocytogenes C) Neisseria meningitidis D) Streptococcus agalactiae
Secretory IgA antibodies are unique because they
A) have unique light chains. B) are Y-shaped molecules. C) are present in the plasma. D) are connected with J chains and short polypeptides to form dimers. E) are present in lymph nodes.