Which of the following has no contribution to the stability of tRNA?

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#Question id: 9186

#SCPH28 | Zoology

A pathogenic fungus invades a plant. What does the infected plant produce in response to the attack?

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#Question id: 7763

#I Life Science/ Life Sciences Group – I-V

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: 2098

#SCPH01 Biochemistry

The major site of lipid synthesis in eukaryotic cells is the

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#Question id: 1587

#SCPH01 Biochemistry

In the human disease known as lupus, there is an immune reaction against a patientʹs own DNA from broken or dying cells. This kind of response typifies which kind of irregularity?

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#Question id: 3858

#SCPH05 I Biotechnology

The 5' methyl guanosine caps added during RNA chain elongation performs what function?

1. prevents degradation by nucleases 

2. are recognized by protein factors

3. are used to identify the type of RNA