The mucus-producing cells that line the stomach
A) increase the surface area of the stomach for faster digestion.
B) stimulate production of hydrochloric acid.
C) lubricate and protect the stomach lining.
D) move food upward in the stomach to prolong digestion.
Answer: C
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Which of the following will not result from site-specific recombination?
A. inversion B. deletion C. insertion D. translocation E. All of the choices given can occur.
Among the dihybrid crosses below, which will produce a 1:1 phenotypic ratio?
A) AA BB × aa bb B) Aa Bb × Aa Bb C) Aa Bb × aa bb D) Aa BB × aa BB E) AA bb × aa BB
Which of the following has been associated with Alzheimer's Disease?
A) loss of mitochondria B) 5kb and 7.4kb deletions in mtDNA of heart cells C) mutations in cytochrome oxidase c genes in brain cells D) no change in mitochondrial function.
Which of the following techniques involves hybridizing a cDNA sample to a chip containing thousands of single-stranded DNA sequences, allowing one to study the expression of thousands of genes simultaneously?
A) PCR B) Southern blot C) FISH D) Agarose gel electrophoresis E) DNA microarray