Biology (Mader), 10th Edition

Chapter 13: Regulation of Gene Activity

Aging Secret

Objective: Students will be able to identify the role of anti-oxidants in reducing free-radicals as well as use the evidence seen in this research that link the direct importance that it has to mitochondria within the cell.

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1.

Why did the genetically modified mice live 20% longer than normal mice?
A)They were given a gene that makes a natural anti-oxidant
B)They were on a modified diet rich in Vitamin C
C)They were encouraged to have longer lengths of sleep
D)They were given regular exercise
2.

What organelle was determined to be critical to the gene's effectiveness?
A)endoplasmic reticulum
B)mitochondria
C)lysosomes
D)Golgi Apparatus
3.

What do anti-oxidants actually do in the body?
A)Help in the production of immune cells
B)Help to absorb calcium across the intestinal wall
C)Help to serve as co-factors for metabolism
D)Destroy free radicals that can accumulate in cells
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