To Check the Effect of Cold Temperatures on the Battery's

question 63

Multiple Choice

To check the effect of cold temperatures on the battery's ability to start a car researchers purchased
A battery from Sears and one from NAPA. They disabled a car so it would not start, put the car in a
Warm garage, and installed the Sears battery. They tried to start the car repeatedly, keeping track of
The total time that elapsed before the battery could no longer turn the engine over. Then they
Moved the car outdoors where the temperature was below zero. After the car had chilled there for
Several hours the researchers installed the NAPA battery and repeated the test. Is this a good
Experimental design?

• A) No, because they should have tested other brands of batteries, too.
• B) Yes
• C) No, because they should have tested more temperatures.
• D) No, because temperature is confounded by brand.
• E) No, because the car and the batteries were not chosen at random.

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Definitions:

DNA Subunits

The basic building blocks of DNA, consisting of a phosphate group, a sugar molecule (deoxyribose), and one of four nitrogenous bases: adenine, thymine, cytosine, or guanine.

A-T; C-G

Represents the base pairing rules in DNA, where Adenine pairs with Thymine (A-T) and Cytosine pairs with Guanine (C-G).

Gene Expression

The process by which information from a gene is used to synthesize a functional gene product, often proteins, influencing the cell's structure and function.

Phenotype

The collection of traits that can be seen in a person, which emerge from the way their genetic makeup interacts with their surroundings.