The products of the hydrolysis of lactose by ?-galactosidase are:
A. galactose and allolactose.
B. glucose and allolactose.
C. galactose and glucose.
D. glucose and ribose.
C
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Which of the following causes an exotic species to become an invasive species?
a. An exotic species multiplies and changes the ecological conditions of the environment. b. An exotic species has characteristics that are like the environment’s endemic species. c. An exotic species is transported intentionally by humans into a new environment. d. An exotic species competes for resources with an environment’s endemic species.
Match the membrane lipid group on the left with the correct type of membrane lipid on the right
A) proposed the protein-lipid-protein "sandwich" model of the cell membrane B) proposed the "unit membrane" model based on electron microscopy images of the "railroad track" pattern of membranes C) proposed the fluid mosaic model of the cell membrane D) described the chemical nature of the cell membrane E) created lipid monolayers from solubilized cell membrane lipids F) determined the 3D structure of a membrane protein demonstrating transmembrane segments G) created lipid bilayers from solubilized cell membrane lipids H) demonstrated that a biological membrane is a lipid bilayer 1) Davson and Danielli 2) Gorter and Grendel 3) J. David Robertson 4) Irving Langmuir 5) Unwin and Henderson 6) Charles Overton 7) Singer and Nicolson
A disease that occurs more or less all the time is classified as ____
a. epidemic b. pandemic c. endemic d. nosocomial e. maldemic
Significant in the deciphering of the genetic code was the discovery of the enzyme polynucleotide phosphorylase. What is this enzyme used for?
A) manufacture of synthetic RNA for cell-free systems B) degradation of RNA C) ribosomal translocation D) peptide bond formation E) production of ribosomal proteins