Which of the following is a complex carbohydrate that cannot be digested?
A) disaccharides B) starches
C) fibers D) high fructose corn syrup
Answer: C
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The glandular secretions involved in digestion that would most likely be released as inactive precursors are
A. acid-neutralizing bicarbonate B. protein-digesting enzymes C. fat-solubilizing bile salts D. carbohydrate-digesting enzymes
How do Rhizobia bacteria colonize root cells to conduct N fixation?
What will be an ideal response?
Why is it important that CO2 be rapidly removed from the cells of animals?
a. because high cellular CO2 affects cellular respiration b. because high cellular CO2 is a narcotic poison c. because CO2 damages nerve function d. because CO2 damages muscle function
You want to design a DNA probe used for hybridization to isolate a clone from a cDNA library. Which of the following statements about DNA probes is true?
(a) The shorter the DNA probe used to probe the library, the greater the number of colonies to which the probe might hybridize. (b) A DNA probe that contains sequences that span two exons is better suited to the purpose than a DNA probe that only contains sequences from one exon. (c) A DNA probe that contains sequences immediately upstream of the DNA that codes for the first methionine in the open reading frame will usually not hybridize to clones in a cDNA library. (d) Hybridization of a DNA probe to the plasmid of interest will permit the detection of the clone of interest; labeling of the DNA probe is not necessary.