Metabolic fingerprinting could be used ____
a. to determine the structure of a metabolite
b. to compare the metabolic differences between healthy and disease cells
c. to decipher the mRNA sequence of a metabolic enzyme
d. to identify the sequence of a metabolic gene
e. for paternity testing
ANSWER: b
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Enzymes that readily break starch apart cannot hydrolyze the glycosidic linkages found in cellulose. Why is this logical?
A) The geometry of the bonds is different, and the shapes of enzyme active sites are highly specific. B) Starch is held together by hydrogen bonding, not covalent bonding. C) Cellulose molecules are highly branched, and enzymes are too bulky to fit. D) Starch is held together by peptide bonds, not glycosidic linkages.
The number of genes that affect skin, hair, and eye color is
A) less than 4. B) less than 8. C) more than 20,000. D) more than 100.
A young man is brought to an emergency room; his diagnosis is a broken cheek bone. Which one of the following bones has been affected?
A) zygomatic B) mandible C) frontal D) sphenoid E) temporal
When Mendel crossed plants and followed two traits (a dihybrid cross), he saw a 9:3:3:1 ratio of traits in the F2 generation. What did he conclude?
A) The two traits affect each other's transmission. B) Dominant traits are always more common than recessive ones. C) The transmission of one trait is unaffected by the other. D) In meiosis, one allele of each gene is passed to each gamete.