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TLS Online TPP Program

#Question id: 7191

In tunicate embryo, Presumptive endoderm originates from the vegetal A4.1 and B4.1 blastomeres. The specification of these cells coincides with the localization of β-catenin. Which of the following statement is incorrect?

#Unit 5. Developmental Biology
  1. Inhibition of β-catenin results in the loss of endoderm and its replacement by ectoderm in the tunicate embryo.
  2. increasing β-catenin synthesis causes an increase in the endoderm at the expense of the ectoderm (just as in sea urchins).
  3. The β-catenin transcription factor appears to function by activating the synthesis of the homeobox transcription factor Lhx3. Inhibition of the lhx3 message prohibits differentiation of endoderm.
  4. During the differentiation of endoderm β-catenin inhibits the synthesis of Lhx3. Expression of Lhx3 message causes differentiation of ectoderm.
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TLS Online TPP Program

#Question id: 12734

#Unit 13. Methods in Biology

Name the US-based company which is able to provide personal genetic information based on analysis of disease genes such as diabetes and others.
TLS Online TPP Program

#Question id: 624

#Unit 1. Molecules and their Interaction Relevant to Biology

The following data were obtained in a study of an enzyme known to follow Michaelis-Menten kinetics: The Km for this enzyme is approximately:
TLS Online TPP Program

#Question id: 2847

#Unit 2. Cellular Organization

Select the answer that describes a region of DNA in which genes are likely to be located.
TLS Online TPP Program

#Question id: 19186

#Unit 13. Methods in Biology

In another method of quantitative PCR, reporter-quencher set up is used. Which of the statement holds true for this methodology?
TLS Online TPP Program

#Question id: 27043

#Unit 10. Ecological Principles

Predator has carrying capacity

Following some observation are given
The number of prey, N, increase at low predator densities, P, and decrease at high predator densities
Prey zero isoclines is depends on the ratio of the growth rate of prey to the capture efficiency of the predators
 Number of predator needed for prey isoclines is depends on the ratio of the death rate of predators to the conversion efficiency of predators
Number of predator for prey isoclines depends on the ratio of the death rate of prey to the conversion efficiency of predators
Which of the above observation are true?