Practice Questions

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#Question id: 12904

Match the following:
1. Southern Blotting i. Melting temperature of DNA strand
2. DNA microchips ii.oligonucleotide matching to DNA sample
3. ASO-PCR iii.DNA hybridization to oligo arrays
4. DGGE iv. labeled probe hybridization to DNA

#Unit 13. Methods in Biology

1-iv,2-iii,3-ii,4-i
1-iii,2-iv,3-i,4-ii
1-iv,2-ii,3-i,4-iii
1-i, 2-iii, 3-iv, 4-ii

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TLS Online TPP Program

#Question id: 28393

#Unit 5. Developmental Biology

The mechanism for this “bottom-up” specification of the frog embryo resides in a set of mRNAs that are tethered to the vegetal cortex. This includes the mRNA such as___

TLS Online TPP Program

#Question id: 28394

#Unit 5. Developmental Biology

the mRNA for the transcription factor VegT, which becomes apportioned to the vegetal cells during cleavage. VegT is critical in generating which of the following lineages?

TLS Online TPP Program

#Question id: 28395

#Unit 5. Developmental Biology

One of the genes activated by VegT protein encodes the Sox17 transcription factor , these sox17 transcription factor is critical for which functions?

TLS Online TPP Program

#Question id: 28396

#Unit 5. Developmental Biology

VegT is critical in generating the germ cells, two genes activated by VegT protein that encodes the transcriptional factor as well as paracrine factors that instruct the cell layers to become their fate. which of the following statements is incorrect?

a) Sox17 paracrine factor that specify cells to be endoderm

b) Nodal transcription factors that instruct the cell layers above them to become mesoderm

c) Nodal paracrine factors that instruct the cell layers above them to become mesoderm

d) Sox17 transcription factor that specify cells to be endoderm