Which of the following apply to fibronectins? Please select all that apply.

a) They are disulphide linked dimers, with each polypeptide composed of a number of binding domains joined together by short flexible segments.

b) They have an essential role in linking the extracellular matrix to its underlying cells.

c) Like integrins, fibronectins are directly connected to the cytoskeleton.

d) They participate in 'inside out' and 'outside in' signalling mechanisms.

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#Question id: 19366

#Unit 13. Methods in Biology

Which of the following is site specific recombination?

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#Question id: 10630

#Unit 10. Ecological Principles

Following is relation between population size with various strategies of species, following is correct figure? 

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#Question id: 23104

#Unit 2. Cellular Organization

Which of the following statement is true regarding second level of organization 

a. The second level of organization is the coiling of the 10-nm fiber of nucleosomes into a helical array.

b. The coiled helical array to constitute the fiber of diameter 30 nm that is found in interphase chromatin and in mitotic chromosomes.

c. This compacts the DNA - 40-fold. The structure of this fiber requires the histone tails and is stabilized by linker histones.

d. Histone H1, histone tails, and increased ionic strength all promote the formation of the 30-nm fiber.

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#Question id: 29477

#Unit 6. System Physiology – Plant

Gibberellins biosynthesis completes in almost three organelles, in which organelles  formation of geranylgeranyl diphosphate or GGPP takes place 

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#Question id: 325

#Unit 1. Molecules and their Interaction Relevant to Biology

A true statement about hydrophobic interactions is that they: