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TLS Online TPP Program

#Question id: 4165

Which is true about proofreading activity during the synthesis of aminoacyl-tRNAs?

#SCPH05 I Biotechnology

  1. Proofreading is accomplished as an amino acid enters the active site of the enzyme. Incorrect amino acids are rejected before any reaction occurs.

  2. Proofreading occurs just after aminoacyl-adenylate formation.

  3. A separate cytosolic proofreading enzyme catalyzes the hydrolysis of incorrect aminoacyl-tRNAs.

  4. No proofreading activity is necessary due to the high level of specificity of all aminoacyl-tRNA synthetases.

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TLS Online TPP Program

#Question id: 18224

#SCPH06 I Botany

Proterozoic era characterized by___
a) Origin of life
b) Fossils of blue green algae
c) Most invertebrate evolved
d) First gymnosperm
e) Abundance of marine algae
TLS Online TPP Program

#Question id: 5621

#SCPH01 Biochemistry

In sea urchin, the bindin receptor activates________ which activates PLC-
TLS Online TPP Program

#Question id: 9050

#SCPH06 I Botany

If an ecologist were studying the regional interactions among multiple populations of different species and how they influence the exchange of materials between their various environments, then this would be an example of which kind of research?
TLS Online TPP Program

#Question id: 1568

#SCPH05 I Biotechnology

which one of these is not a characteristics  of B-cell?
TLS Online TPP Program

#Question id: 2647

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

Which of this mode of trp regulation is not possible in eukaryotes?