TLS Online TPP Program

#Question id: 12093


The resemblance of body structure and mode of life of some species of Australian marsupials to certain species of placental mammals is an example of

#Unit 10. Ecological Principles
  1. Convergent evolution
  2. Punctuated equilibrium
  3. Genetic drift 
  4. Sequential evolution
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TLS Online TPP Program

#Question id: 2494

#Unit 2. Cellular Organization

Separation of spindle poles during spindle formation and anaphase B most likely depends on which of the following?

TLS Online TPP Program

#Question id: 2826

#Unit 2. Cellular Organization

An open reading frame (ORF) is defined as a DNA sequence that

a. begins with a start codon.               

b. ends with a stop codon.

c. contains 50 codons.   

d. contains approximately an equal frequency of A, T, G, and C.

TLS Online TPP Program

#Question id: 12929

#Unit 13. Methods in Biology

Temperature at which the kinetic energy of the molecules lowers to reduce the chances of base paired sticky ends parting before they have been stabilized.

TLS Online TPP Program

#Question id: 11922

#Unit 10. Ecological Principles

Which of the following environmental features might influence microclimates? 

TLS Online TPP Program

#Question id: 24245

#Unit 4. Cell Communication and Cell Signaling

Following statements are regarding to Integrins receptors;
a. Integrins are the principal receptors used by animal cells to bind to the extracellular matrix. 
b. Integrins function as transmembrane linkers (integrators) between the extracellular matrix and the actin cytoskeleton. 
c. An integrin molecule is composed of four covalently associated transmembrane glycoprotein subunits called α2 and β2.
d. Integrins bind extracellular matrix (ECM) glycoproteins, Laminins, Collagens, Fibronectin and Vitronectin.
Which of the following statements are incorrect?