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TLS Online TPP Program

#Question id: 7183

Following graphs (A and B) represents establishment of a maternal gradient in Hunchback protein.

                  

which of the following statements are correct according to graphs?

#Unit 5. Developmental Biology
  1. Graph A shows unfertilized egg, in which maternal hunchback mRNA is present at a relatively low level throughout the egg, whereas nanos mRNA is located posteriorly and Graph B shows fertilized egg, in which nanos mRNA is translated and nanos protein blocks translation of hunchback mRNA in the posterior regions, giving rise to a shallow antero-posterior gradient in maternal Hunchback protein.
  2. Graph A shows fertilized egg, in which nanos mRNA is translated and nanos protein blocks translation of hunchback mRNA in the posterior regions, giving rise to a shallow antero-posterior gradient in maternal Hunchback protein and Graph B shows unfertilized egg, in which maternal hunchback mRNA is present at a relatively low level throughout the egg, whereas nanos mRNA is located posteriorly.
  3. Graph A shows unfertilized egg, in which nanos mRNA is translated and nanos protein blocks translation of hunchback mRNA in the posterior regions, giving rise to a shallow antero-posterior gradient in maternal Hunchback protein and Graph B shows fertilized egg, in which maternal hunchback mRNA is present at a relatively low level throughout the egg, whereas nanos mRNA is located posteriorly.
  4. Graph A and B both shows fertilized egg, in which nanos mRNA is translated and hunchback mRNA is untranslated.
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TLS Online TPP Program

#Question id: 1526

#Unit 4. Cell Communication and Cell Signaling

Following statements are regarding to apoptosis.

A. In the worm apoptotic pathway, CED-3 (caspase-9 in mammals) is a protease required to destroy cell components during apoptosis.

B. CED-4 (Apaf-1) was able to accelerate the autoproteolytic cleavage and activation of purified CED-9

C. Once EGL-1 causes dissociation of the CED-4/CED-9 complex, the released CED-4 dimer joins with three other CED-4 dimers to make an octamer, which then activates CED-3

D. Many apoptotic stimuli lead to damage of the outer mitochondrial membrane, causing release into the cytosol of several proteins that stimulate apoptosis. In particular, cytochrome c released from mitochondria activates Apaf-1, which in turn activates caspase-3 and 7.

Which of the following combination is incorrect?
TLS Online TPP Program

#Question id: 28753

#Unit 2. Cellular Organization

Plasmalogens Contain an unusual fatty alcohol that is attached through an
TLS Online TPP Program

#Question id: 102

#Unit 1. Molecules and their Interaction Relevant to Biology

 The structure of a disaccharide is shown below. Which statement is correct about following structure?
TLS Online TPP Program

#Question id: 4477

#Unit 3. Fundamental Processes

The large subunit of Pol II has a carboxy-terminal domain (CTD), which is referred to as the “tail”. The CTD contains a series of repeats of the heptapeptide sequence is;
TLS Online TPP Program

#Question id: 12245

#Unit 10. Ecological Principles

The graph above illustrates a simplified description of the effect of disturbance on species diversity. Which of the following best explains the graph?