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: 1593

#SCPH01 Biochemistry

Which of the following results in long-term immunity?

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#Question id: 2722

#SCPH05 I Biotechnology

Which type of supercoiling takes the form of extended right-handed coils?

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#Question id: 361

#SCPH05 I Biotechnology

Calculate the percentage of histidine that has its imidazole side chain protonated at pH 7.3. The pKa values for histidine are pK1 = 1.8, pK2 (imidazole) = 6.0, and pK3 = 9.2.

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#Question id: 5264

#SCPH05 I Biotechnology

Studies done by Buchner showed that ground-up yeast cells were able to convert sugar to alcohol. The components of the mixture that were responsible for this transformation were

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#Question id: 16093

#SCPH28 | Zoology

The thermoregulatory centre is located in: