20. A key is placed into a keyhole then turned and the door opens. When considering the components of cell signaling, the action of turning the key would best correspond to A) conformational change in the receptor once bound to the hormone. B) the cell response that occurs when the receptor binds the hormone. C) the binding site of the receptor. D) the concentration of the hormone. E) signal transduction that occurs when the receptor binds the hormone.

Jenny is watching her mother’s reaction during a storm and will probably react in a similar way during the next storm. This is known as ________________.      

17. If you wanted to install lights to grow plants indoors, the type of light would you want to use is A) visible light, because it has low energy wavelengths. B) infrared, because it has high energy wavelengths. C) gamma rays, because it has high energy wavelengths. D) microwaves, because it has low energy wavelengths. E) ultraviolet, because it has high energy wavelengths.

To test wire insulation, a special type of ohmmeter called a(n) _____ is used.

Metformin is a member of the biguanide group and is used to treat type 2 diabetes.

_____________ is the person’s genetic heritage, the actual genetic material.    

Find the resistance of a piece of 6 AWG tungsten wire that is 450 ft long. Assume a temperature of 20°C.

The unit circular mil is equal to the _____.

10. Select all the macromolecules that make up and maintain living organisms. A) carbohydrates B) proteins C) amino acids D) lipids E) nucleic acids F) vitamins G) nucleic acids, proteins, lipids carbohydrates

11. A researcher decides to test the scientific validity of the common phrase “An apple a day keeps the doctor away.” What would be a valid hypothesis to investigate this specific question? A) The daily consumption of a single apple does not change the number of visits to the doctor. B) Apples are high in vitamin C C) Eating apples decreases the frequency of contracting a cold. D) Those who consume apples have longer lifespans than those who do not consume apples. E) Eating one apple every day is good for you.