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Nostrana [21]
3 years ago
6

An antibody has been isolated that binds to F-actin but not to G-actin. What structural feature(s) of F-actin do you suppose the

antibody binds (i.e., how is the antibody able to distinguish between these two forms of actin)?
Biology
1 answer:
galina1969 [7]3 years ago
7 0

Answer:

F-actin is a double helical filament as opposed to G-actin,which is a globular protein .Each actin filament has two ends,called the plus and

the minus ends, which makes it recognizable from each other.This gives the structure a distinct polarity.

Explanation:

Actin is the most abundant protein that is found in almost all eukaryotic cells.Its a most important part cytoskeleton as its a monomeric subunits(size 42kDa) of two types of filaments i.e. microfilaments and thin filaments in cells. Actin is essentially required to maintain stability and morphogenesis of cell.It is involved in numerous significant processes such as endocytosis,cell division and migration.Actin is present in two forms:

•G-actin

•F-actin

The two forms of actin are different structurally.

G- actin is a globular shaped protein,usually present in free form(a monomer),having a tight binding site for another actin monomer.Each monomer has ATP. Upon polymerization of G-actin monomers, a polymer called F-actin filaments is form. This process is driven by hydrolysis of ATP.

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1. The answer is B. Birds can fly across the oceans and settle in either island that makes up New Zealand. Plants also can produce pollen and seeds that can be easily dispersed by wind or water to either island. The distribution of birds and animals across the more or less uniform. However, animals are unable to make ocean crossing hence each island has its own species of animal that is adapted to its island’s environment.


2. The answer is A. Endemic species means species that are specifically adapted to a particular environment and can only be found there due to the high adaptation to the environment over many years. The Bighorn sheep are native to North America, not in New Zealand.


3. The answer is D. Million of years ago, the continents were one continent called Pangea. Due to tectonic plate movement, powered by the convection currents of the mantle, Pages broke off into the continents we have today. Using the jigsaw puzzle, the initial location of a continent in Pangea can actually be determined by checking their current location and the shape of their coastal outline that fits into that of their closest continent. This is true for New Zealand that fits in between the Australian and Pacific plates.


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