4.7 Apr 29 Warm-up: Biochemistry STAAR Review

1. Taq polymerase is an enzyme used in the polymerase chain reaction (PCR) to replicate fragments of DNA. A study published in 1976 examined the properties of Taq polymerase after the enzyme was isolated from Thermus aquaticus, a thermophilic bacterium that lives in the hot springs of Yellowstone National Park. The graph shows one of the results of the study.Which statement about enzyme activity is best supported by this graph? An enzyme must be composed of multiple polypeptides, or subunits, to be active. An enzyme’s rate of activity increases with time until it becomes inactive. An enzyme functions best under specific temperature conditions. An enzyme works equally well in bacteria that are adapted to high temperatures and in eukaryotic cells such as human cells 2. Which choice below correctly matches the biomolecule type with its primary function? protein: stores genetic information carbohydrate: provides long term energy nucleic acid: stores and transmits genetic information lipids: major component of plant cell walls 3. Match the monomer to the correct polymer. fatty acid triglyceride monosaccharide starch amino acid protein nucleotide RNA 4. Match the examples with the correct type of biomolecule fruits and vegetables; bread and potatoes simple and complex carbohydrates butter, oil, lard lipids fish, beef, eggs proteins glucose, fructose, galactose monosaccharides maltose, sucrose (table sugar), and lactose disaccharides