A Colleague Gives You Two Tubes Containing Membrane Fractions from an Animal

question 39

Multiple Choice

A colleague gives you two tubes containing membrane fractions from an animal cell lysate.One tube contains the plasma membrane fraction,and the other tube contains the mitochondrial inner membrane fraction,but the tubes are not labeled.When you analyze the macromolecule composition of the samples,you are confident that the second tube contains the mitochondrial fraction,because the sample has

• A)a higher ratio of cholesterol to phospholipids.
• B)a higher protein to lipid ratio.
• C)a lower protein to lipid ratio.
• D)more carbohydrate in glycoproteins.
• E)more GPI-anchored proteins.

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Definitions:

Epidemiological Studies

Epidemiological studies are research investigations that examine the patterns, causes, and effects of health and disease conditions in defined populations.

Incidence

The occurrence, rate, or frequency of a disease, crime, or something undesirable within a specified population or area.

Prevalence

The proportion of individuals in a population who have a particular disease or condition at a specific time.

Risk Factors

Elements or conditions that increase the likelihood of developing a disease or injury, including genetic, environmental, and lifestyle factors.