Integrins are the principal receptors used by animal cells to bind to the extracellular matrix. They are heterodimers and function as transmembrane linkers between the extracellular matrix and the actin cytoskeleton. A cell can regulate the adhesive activity of its integrins from within. An example of an integrin containing cell junction is

TLS Online TPP Program

#Question id: 26857

#Unit 10. Ecological Principles

Calculate the efficiency of GPP, if the energy of incident light is 1000 J but Energy fixed by GPP is 100 J ?

TLS Online TPP Program

#Question id: 11752

#Unit 7. System Physiology – Animal

Which of the following substances enhances the sensitivity of pain receptors but does not directly excite them?

TLS Online TPP Program

#Question id: 20312

#Unit 7. System Physiology – Animal

Aldosterone not only causes potassium to be secreted into the tubules in exchange for sodium reabsorption in the principal cells of the renal collecting tubules but also causes 

TLS Online TPP Program

#Question id: 21248

#Unit 7. System Physiology – Animal

An 11-year-old male was having difficulty reading the graphs that his teacher was showing at the front of classroom. His teacher recommended he be seen by an ophthalmologist. Not only was he asked to look at a Snellen letter chart for visual acuity but he was also asked to identify numbers in an Ishihara chart. He responded that he merely saw a bunch of dots. Abnormal color vision is 20 times more  common in men than women because most cases are caused by an abnormal

TLS Online TPP Program

#Question id: 387

#Unit 1. Molecules and their Interaction Relevant to Biology

For a weak acid with a pKa of 6.0, What would be the ratio of acid to salt at pH 5.