Scientists Can Determine the Size of DNA Fragments Through a Process

question 36

Multiple Choice

Scientists can determine the size of DNA fragments through a process known as gel electrophoresis. In this process, DNA is loaded into a gel submerged in a liquid solution through which an electric current is run. Large DNA molecules move slower and can be observed at the top of the gel, whereas smaller DNA fragments move faster and are seen at the bottom of the gel. Based on what you know about the properties of DNA, how is the electric current arranged in this process?

• A)Since DNA is negatively charged, the negative end is placed at the top of the gel, and the positive end is placed at the bottom of the gel.
• B)Since DNA is negatively charged, the positive end is placed at the top of the gel, and the negative end is placed at the bottom of the gel.
• C)Since DNA is positively charged, the negative end is placed at the top of the gel, and the positive end is placed at the bottom of the gel.
• D)Since DNA is positively charged, the positive end is placed at the top of the gel, and the negative end is placed at the bottom of the gel.
• E)Since DNA is uncharged, the placement of the positive end and negative end does not matter.

Recognize the stages of the general adaptation syndrome (GAS) and their significance.

Assess the effect of life changes and daily hassles on stress levels.

Identify the demands that stress places on an organism and the body's physiological responses.

Understand the role of psychological hardiness and locus of control in stress management.

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Definitions:

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The process of starting a new company or venture, including planning, making key financial decisions, and completing legal activities required for operation.

Getting Customers

The process of attracting and acquiring individuals or businesses to purchase goods or services.

Finding Financing

The process of securing funds for business operations, investments, or projects.