The dermal endoskeleton of echinoderms is made of
(a) cartilage.
(b) bone.
(c) calcium carbonate.
(d) chitin.
(c) calcium carbonate.
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In eukaryotic cells, the oxidation of pyruvate occurs in:
A. the cytoplasm. B. the nucleus. C. the matrix of the mitochondria. D. the endoplasmic reticulum. E. vacuoles.
Which of the following events does not occur during meiosis I?
a. DNA exchange b. pairing of homologous chromosomes c. separation of sister chromatids d. separation of homologous chromosomes e. crossing-over between homologous chromosomes
Which of the following processes could a scientist use to make an amount of DNA that is large enough study?
A.) polymerase chain reaction B.) genetic engineering C.) bioinformatics D.) gel electrophoresis
When developing a monoclonal antibody-based test kit, great care must be taken to choose an antibody with the right binding properties. Imagine that you are developing a food-testing kit to specifically detect E. coli 0157:H7, a pathogenic serotype of E. coli that causes food poisoning. Choose the hybridoma line best suited for use in your test kit.hybridoma line E. coli 0157:H7 E. coli K-12 MG1655 E. coli 0150:H5 E. coli 0152:H28 1 +++ - +++ - 2 - ++ ++ + 3 ++ - - - 4 +++ ++ ++ ++ 5 + +++ - -
A. 1 B. 2 C. 3 D. 4 E. 5