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TLS Online TPP Program

#Question id: 7237

Following statements were made regarding vulval development in C. elegans:

A. The formation of the anchor cell is mediated by lin-12, the C. elegans homologue of the Notch gene.

B. The formation of the anchor cell is mediated by lin-12, the C. elegans homologue of the Delta gene.

C. The lin-12 gene needs to function only in that cell destined to become the uterine precursor cell.

D. Presumptive Anchor cell also need lin-12.

E. Two cells originally synthesize both the signal for uterine differentiation (the LAG-2 protein, homologous to Delta) and the receptor for this molecule (the LIN-12 protein, homologous to Notch.

F. Only one cell synthesize both the signal for uterine differentiation (the LAG-2 protein, homologous to Delta) and the receptor for this molecule (the LIN-12 protein, homologous to Notch.

Which one of the following options represents a combination of incorrect statements?

#Unit 5. Developmental Biology
  1. A, C and D
  2. A, B and C
  3. A, C and E
  4. B, D and F
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TLS Online TPP Program

#Question id: 3774

#Unit 3. Fundamental Processes

Use the figure to answer the following question. Referring to the figure, what bases will be added to the primer as DNA replication proceeds?
TLS Online TPP Program

#Question id: 15483

#Unit 12. Applied Biology

A novel technique for strain improvement combining the advantage of multi-parental crossing allowed by DNA shuffling with the recombination of entire genomes.
TLS Online TPP Program

#Question id: 5694

#Unit 8. Inheritance Biology

In anaphase I, the chromosomes separate in  three different ways , which of the following way for chromosome saparation leads to nonviable gamete formation
TLS Online TPP Program

#Question id: 15683

#Unit 2. Cellular Organization

A common application of dry heat in the microbiology laboratory is to
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#Question id: 16136

#Unit 13. Methods in Biology

You obtain 6 BACs (of known order, as shown below) and 7 STSs (of unknown order) that derive from a region of mouse chromosome 16 whose genomic sequence has not yet been finished.   
 
By PCR (using 20-bp primers at either end of each STS), you test each of the 6 BACs for the presence (+) or absence (-) of each of the 7 STSs. You obtain the following results:
 
Is there a second STS at which you would like to sequence PCR products obtained using BACs as templates? If so, which BACs would you test in this way, and what sequencing results might you predict for each of the BACs tested?