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TLS Online TPP Program

#Question id: 10356

Why the GS  and GOGAT is activated in light and while the AS is inhibited?

#Unit 6. System Physiology – Plant
  1. In presence of light and carbohydrate, GS and GOGAT activate so that plant can grow while AS is inhibited so that amino group will not be transported
  2. GS  and GOGAT is activated because they favor nitrogen assimilation into glutamine and glutamate, compounds that are rich in nitrogen and sufficiently stable for long-distance transport or longterm storage
  3. In presence of light and carbohydrate, GS and GOGAT activate so that amino group will be transported while AS is inhibited so that plant can’t grow
  4. AS is inhibited because it favor nitrogen assimilation into asparagine, a compound that is rich in carbon and participate in the synthesis of new plant materials 
More Questions
TLS Online TPP Program

#Question id: 30110

#Unit 1. Molecules and their Interaction Relevant to Biology

The ribose phosphate group of purine nucleotide is taken from which compound?
TLS Online TPP Program

#Question id: 30111

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the source of the C-2 during the de novo biosynthesis of pyrimidines?
TLS Online TPP Program

#Question id: 30112

#Unit 1. Molecules and their Interaction Relevant to Biology

With respect to the de novo synthesis of nucleotides, which one of the following statements is INCORRECT?
TLS Online TPP Program

#Question id: 30113

#Unit 1. Molecules and their Interaction Relevant to Biology

Aspartate (Asp) is an amino acid with the structure NH2-CH(CH2-COOH)COOH. Given below are biosynthetic processes occurring in cells:
A. protein synthesis
B. de novo synthesis of inosine monophosphate and orotic acid
C. synthesis of adenosine monophosphate from inosine monophosphate
D. glutathione synthesis

Which one of the following options correctly represents all the biosynthetic process( es) wherein Asp is involved as a precursor?
TLS Online TPP Program

#Question id: 30114

#Unit 1. Molecules and their Interaction Relevant to Biology

In the case of monoclonal antibody production by hybridoma technology, myeloma cells used lack the enzyme hypxanthine - guanine phosphoriboxyl transferase(HGPRT) such that fused cells can only survive when selected on hypoxanthine-aminopterinthymdine (HAT). What is the role of aminopterin in this medium?
TLS Online TPP Program

#Question id: 30115

#Unit 1. Molecules and their Interaction Relevant to Biology

The antibacterial trimethoprim is an inhibitor of