Which of the following is/are true about monoclonal antibodies?
A. They recognize a specific epitope
B. They are a useful tool in disease diagnosis
C. They are made by hybridizing a myeloma cell and an activated B cell
D. All of the choices are correct.
Answer: D
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A mixture of vegetable oil and water will separate into layers because oil is ____ and forms ____
a. hydrophobic; nonpolar associations b. hydrophilic; nonpolar associations c. hydrophilic; polar associations d. hydrophobic; polar associations e. hydrophobic; ionic associations
This simple plant tissue consists of dead cells
with thick, lignified cell walls that function in support. This plant tissue is
a. parenchyma. b. sclerenchyma. c. collenchyma. d. xylem. e. phloem
Genetic recombination as a result of crossing
over occurs more readily in genes
a. that are on the sex chromosomes. b. that are on the autosomes. c. that are located close together on the same chromosome. d. that are located far apart on the same chromosome. e. that are located on different chromosomes.
When an mRNA moves into the cell's cytoplasm, it first becomes associated with a:
A) transcription factor. B) protein. C) ribosome. D) tRNA.