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TLS Online TPP Program

#Question id: 1028

The capsule

#Unit 4. Cell Communication and Cell Signaling

  1. may be used for protection.

  2. may be used to help the bacteria adhere to surfaces.

  3. may be involved in movement.

  4. may be used for protection AND may be used to help the bacteria adhere to surfaces.

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TLS Online TPP Program

#Question id: 414

#Unit 1. Molecules and their Interaction Relevant to Biology

The hydrolysis of phosphoenolpyruvate proceeds with a DG'° of about –62 kJ/mol. The greatest contributing factors to this reaction are the destabilization of the reactants by electostatic repulsion and stabilization of the product pyruvate by:
TLS Online TPP Program

#Question id: 15620

#Unit 13. Methods in Biology

Wild type E. coli metabolizes the sugar lactose by expressing the enzyme ß-galactosidase. You have isolated a mutant that you call lac1–, which cannot synthesize ß-galactosidase and cannot grow on lactose (Lac–). During an condition Lac– strain, called lac3–, is linked to the Tn5 insertion. From a strain carrying the Tn5 insertion and lac3– mutation you isolate an F’ that caries a region of the chromosome that includes both Tn5 and the linked Lac region. Introduce this F’ into an F– strain carrying lac1– by selecting for Kanr. These merodiploids express ß-galactosidase normally. What does this result tell you about the relationship between the lac3– and lac1- mutations?  
TLS Online TPP Program

#Question id: 33448

#Unit 1. Molecules and their Interaction Relevant to Biology

Identify the structure
TLS Online TPP Program

#Question id: 7258

#Unit 5. Developmental Biology

A four-cell embryo normally develops into a blastocyst consisting of trophectoderm (TE) cells on the outside and inner cell mass (ICM) cells inside. The transplantation experiments were done with mouse embryos.

A. If a labeled cell is placed on the outside of a very early embryo, it is likely to form extraembryonic tissues.

B. If a labeled cell is placed on the inside of a very early embryo, it is likely to form embryonic tissues.

According to above observations which of the following statement is true?
TLS Online TPP Program

#Question id: 29026

#Unit 11. Evolution and Behavior

Caused of behaviour are of two types proximate cause and ultimate cause. Given statements about these causes, which of the following is not true?