TLS Online TPP Program

#Question id: 24256


The H32.H42 tetramer bound to DNA recruits

#Unit 2. Cellular Organization
  1. single copies of the H2A.H2B dimer to complete the assembly of the final nucleosome.
  2. two copies of the H2A.H2B dimer to complete the assembly of the final nucleosome.
  3. three copies of the H2A.H2B dimer to complete the assembly of the final nucleosome.
  4. four copies of the H2A.H2B dimer to complete the assembly of the final nucleosome.
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TLS Online TPP Program

#Question id: 1473

#Unit 4. Cell Communication and Cell Signaling

A cluster of tumor cells that produces and secretes growth factors to induce surrounding cells to grow and divide is showing which type of cell-to-cell signaling?

TLS Online TPP Program

#Question id: 5820

#Unit 8. Inheritance Biology

A new chemical pesticide developed for agricultural use was subjected to the Ames test. The rate of mutation seen in samples treated with the pesticide and liver extract was approximately half that of the samples treated with the liver extract alone; in samples treated with only pesticide, the mutation rate was about the same as that of untreated samples. Which of the following statements could you make about this pesticide?

TLS Online TPP Program

#Question id: 11148

#Unit 7. System Physiology – Animal

Which of the following ions is most likely to cross the plasma membrane of a resting neuron?

TLS Online TPP Program

#Question id: 8900

#Unit 9. Diversity of Life Forms

Which of the following statements about craniates is (are) correct?
1. Craniates are more highly cephalized than are non-craniates.
2. Craniatesʹ genomic evolution includes duplication of clusters of genes that code for transcription factors.
3. The craniate clade is synonymous with the vertebrate clade.
4. Pharyngeal slits that can assist in gas exchange originated in craniates,
5. The two-chambered heart originated with the early craniates.

TLS Online TPP Program

#Question id: 23732

#Unit 8. Inheritance Biology

According to this figure, which of the following statements is correct;
                 
a) The genotype affects plant weight, but the environmental conditions determine which genotype produces the heavier plant.
b) The environmental conditions affects plant weight, but the alleles determine which type of genotype produces the heavier plant.
c) It shows the Genetic–environmental interaction variance
d) It shows only environmental variance (Ve)