Two major sources of mutation are radiation and reactive oxygen species (ROS).The reactive oxygen species hypothesis for aging postulates that 

1) Senescence results from the accumulation of DNA, lipid, and protein damage inflicted by ROS of mitochondrial origin; and

2) Mitochondria of long-lived species should produce high ROS than do mitochondria of short-lived species.

3) the capacity of mitochondria to consume ROS might distinguish long-lived species from short-lived species, rather than differences in ROS generation. 

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#Question id: 1291

#Unit 4. Cell Communication and Cell Signaling

Which of the following is NOT true regarding matrix metalloproteases?

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#Question id: 5015

#Unit 11. Evolution and Behavior

 During which of the following largest mass extinction recorded in the history of life on Earth.

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#Question id: 23322

#Unit 1. Molecules and their Interaction Relevant to Biology

The propounded of the law of single variable is

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#Question id: 11043

#Unit 7. System Physiology – Animal

An increase in which of the following tends to decrease capillary filtration rate?

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#Question id: 11011

#Unit 7. System Physiology – Animal

Which of the following conditions at the S-A node will cause heart rate to decrease?