which of the following radioactive element Used to treat cancerous tumours

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#Question id: 7761

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

Correct sets of genes are well known to be involved in aging and its prevention, and each set appears to be conserved between phyla and even kingdoms. 

a. DNA repair enzymes

b. proteins of the insulin signaling pathway

c. proteins in the mTORC1 signaling pathway

d. chromatin remodeling enzymes

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#Question id: 618

#SCPH05 I Biotechnology

 In the following diagram of the first step in the reaction catalyzed by the protease chymotrypsin, the process of general base catalysis is illustrated by the number ________, and the process of covalent catalysis is illustrated by the number _________.

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#Question id: 10891

#SCPH06 I Botany

In a lake ecosystem with three trophic levels - Phytoplankton (P), Zooplankton (Z) and Carnivore (C) is control by bottom-up effects, which of the following observation is incorrect?

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#Question id: 338

#SCPH06 I Botany

What is the difference between covalent bonds and ionic bonds?

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#Question id: 1691

#SCPH05 I Biotechnology

What is the structure recognized by the αβ T-cell receptor on the cell surface of an antigen-presenting cell?