Which of the following is (are) an infectious disease(s)
A)cholera
B)diptheria
C)malaria
D)all of the above
D)all of the above
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The hemoglobin molecule ____
a. transports oxygen from the lungs to the cells of the body b. prevents sickle cell anemia when present in high enough concentrations in the blood c. is involved in amino acid metabolism d. acts as a cell surface receptor e. is controlled by a single gene
A first exposure to an allergen is likely to activate ________ to make and secrete ________
a. B cells, IgG b. T cells, IgA c. B cells, IgA d. T cells, IgE e. B cells, IgE
Semiconservative DNA replication refers to the fact that _____
1.every A will be matched up with a T on the opposite strand 2.children inherit a mix of genes from both parents 3.the amount of A nucleotides always equals the amount of T nucleotides, and C nucleotides equal G nucleotides. 4.one strand of each parent DNA helix ends up in each new molecule
__________ 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