TLS Online TPP Program

#Question id: 27364


Which statement best describes the distinction between the purposes of the two RNAi pathways within the eukaryotic cell?

#Section 3: Genetics, Cellular and Molecular Biology
  1. miRNA-mediated gene silencing represents a back-up pathway should siRNA-mediated gene silencing be unsuccessful at silencing the target dsRNA
  2. siRNA and miRNA-mediated gene silencing pathways must both be active to successfully silence the target dsRNA

  3. miRNA and siRNA-mediated gene silencing represent evolutionary-independent pathways which confer identical silencing mechanisms on the target dsRNA

  4. siRNA-mediated gene silencing represents a cell defence mechanism against exogenous dsRNA; miRNA-mediated gene silencing is an integral gene expression regulation process

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TLS Online TPP Program

#Question id: 10155

#Section 2: General Biology

Which of the following components carries out oxygen cycle and also produces hydrogen per oxide ?

TLS Online TPP Program

#Question id: 10156

#Section 2: General Biology

Which of the following statements is False about Rubisco?

TLS Online TPP Program

#Question id: 10157

#Section 2: General Biology

In Glycolate pathway, Glycine exits the peroxisomes and enters the mitochondria where a multienzyme complex catalyzes the conversion of two molecules of glycine and one molecule of NAD+ into one molecule each of serine, NADH, NH4 +, and CO2; the enzyme complex used in this reaction is

TLS Online TPP Program

#Question id: 10158

#Section 2: General Biology

Following are some statements regarding CO2 assmilation;

a.) The reduction process-Hydroxypyruvate convert into Glycerate in Peroxisomes in Glycolate pathway

b.) In Calvin-Benson cycle action of Transketolase produces erythrose 4-phosphate and xylulose 5-phosphate during regeneration step

c.) In C4 cycle phosphoenolpyruvate carboxylase (PEPCase), catalyzes the initial carboxylation in mesophyll cells close to the external atmosphere

d.) The stomata of CAM plants open at night

Which of the following above statements combination TRUE?

TLS Online TPP Program

#Question id: 10186

#Section 2: General Biology

Arrange the subatomic particle in order of increasing mass

TLS Online TPP Program

#Question id: 10187

#Section 2: General Biology

Which of the following is correct statement