Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 6070
TLS Online TPP Program

#Question id: 7270

According to this figure which of the following option is incorrect?

#Unit 5. Developmental Biology
  1. OTX is a general transcription factor, and B-catenin from the maternal cytoplasm is concentrated at the vegetal pole of the egg.
  2. These transcriptional regulators are inherited by the micromeres and activate the Pmar1 gene. Pmar1 encodes a repressor of HesC.
  3. In the veg2 macromeres, where activated Pmar1 protein represses the HesC repressor, the macromere specification and signaling genes are active.
  4. In the veg2 cells, Pmar1 is not activated and the HesC gene product shuts down the skeletogenic genes; however, those cells containing Notch can respond to the Delta signal from the skeletogenic mesenchyme.
More Questions
TLS Online TPP Program

#Question id: 13144

#Unit 8. Inheritance Biology

Shell coiling of the snail Limnaea peregra(genetic maternal effect)  the shell coils (s+s+) which is termed dextral coiling, while some snails exhibiting sinistral coiling (ss). The allele for dextral (s +) is dominant over the allele for sinistral (s). If a male homozygous for dextral alleles (s+s+) is crossed with a female homozygous for sinistral alleles (ss) all of the F1 are heterozygous (s+s) and have a sinistral shell. If these F1 snails are self-fertilized, what is the phenotype of the F2 snail?
TLS Online TPP Program

#Question id: 31016

#Unit 4. Cell Communication and Cell Signaling

Epinephrine binding to its receptor stimulates:
TLS Online TPP Program

#Question id: 19822

#Unit 12. Applied Biology

Recognition of which molecules by receptor-like molecules present in resistant plants initiates several biochemical reactions?
TLS Online TPP Program

#Question id: 4615

#Unit 11. Evolution and Behavior

Currently, two of the living elephant species (X and Y) are placed in the genus Loxodonta, and a third surviving species (Z) is placed in the genus Elephas. Assuming this classification reflects evolutionary relatedness, which of the following is the most accurate phylogenetic tree?
TLS Online TPP Program

#Question id: 2989

#Unit 2. Cellular Organization

Use the figure to answer the question below.

In the figure, G1 is represented by which numbered part(s) of the cycle?