A typical candy bar has approximately 250,000 Calories
Indicate whether the statement is true or false.
ANS: F, calories
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The recognition of a chemical signal by a receptor protein in the membrane is most similar to ____
a. mRNA specifying the sequence of amino acids in a polypeptide b. binding of a specific substrate to the active site of an enzyme c. turning on gene transcription d. allosteric regulation of proteins e. an enzyme requiring a specific optimum pH and temperature for activity
Analysis of DNA fragments in gel electrophoresis is based on
A. DNA having an overall negative charge and moving to the positive pole. B. DNA fragments being stained so that they can be seen. C. application of an electric current through the gel causing DNA fragments to migrate. D. larger fragments moving slowly and remaining closer to the wells. E. All of the choices are correct.
A one-way relationship in which one species benefits at the expense of another is called ____
a. commensalism b. symbiosis c. parasitism d. mutualism e. interspecific competition
What was Carrie Buck’s significance in the history of genetics?
A. She was a famous advocate for eugenics. B. She became the first woman geneticist. C. She was sterilized after the US Supreme Court determined she was feebleminded. D. She discovered how to genetically modify corn to be resistant to herbicides. E. She is the author of the first biography of Gregor Mendel.