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inn [45]
3 years ago
8

You are interested in the detailed effects of cytochalasin D on microfilaments over time. Based on what you know about the molec

ular mechanism of action of cytochalasins, describe what happens to MFs in cells treated with the drug. In particular, explain why existing actin polymers eventually depolymerize.
Biology
2 answers:
vekshin13 years ago
8 0

Answer:

Basically  Cytochalasin D inhibits   the rate of actin polymerization and how  actin filaments  interacts with its barbed end in solution.

It does this by inhibiting the addition of more actin monomers to the 'barbed' or 'unsealed'  end of the filaments meant for rapid addition of monomers. On binding,it blocked or capped the barbed end  of the actin filaments inhibiting,monomers addition and  polymerization.

Thus  the failure of addition  of more monomers  inhibits polymerization and prevent elongation of actin filaments. Generally,Cytochalasin inhibits polymerisation at   low concentration .Thus at low concentration of 2uM  its inhibits actin  polymerization by 90%.

Hitman42 [59]3 years ago
7 0

Answer:

Actin depolymerizing factor binds F-actin cooperatively and induces a conformational change in F-actin that causes it to twist further and become more destabilized. This twisting causes severing of the bond between actin monomers, depolymerizing the filament.

Explanation:

Actin filament depolymerization ensures the turnover of actin filaments within these structures and maintains a pool of actin monomers that permits the continual restructuring and growth of the actin cytoskeleton. ADF/cofilin influences actin filament turnover.

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scoray [572]

Answer:

The answer is double replacement :)

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In multicellular organisms which of the following is the highest level of cellular organization? A.)Cells B.)Organs C.)Tissues D
kykrilka [37]
Cells create tissues which create organs which make up systems so i believe the answer is D i hope this helps :)

3 0
3 years ago
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How does the Richter scale measure an earthquake?
USPshnik [31]

Richter's original magnitude scale (ML) was extended to observations of earthquakes of any distance and of focal depths ranging between 0 and 700 km. Because earthquakes excite both body waves, which travel into and through the Earth, and surface waves, which are constrained to follow the natural waveguide of the Earth's uppermost layers, two magnitude scales evolved - the MB and MS scales.

The standard body-wave magnitude formula is

MB = log10(A/T) + Q(D,h) ,

where A is the amplitude of ground motion (in microns); T is the corresponding period (in seconds); and Q(D,h) is a correction factor that is a function of distance, D (degrees), between epicenter and station and focal depth, h (in kilometers), of the earthquake. The standard surface-wave formula is

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There are many variations of these formulas that take into account effects of specific geographic regions so that the final computed magnitude is reasonably consistent with Richter's original definition of ML. Negative magnitude values are permissible.

6 0
3 years ago
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Identify the characteristics of carpetbagger and scalawags
Ulleksa [173]
The term “carpetbaggers” refers to Northerners who moved to the South after the Civil War, during Reconstruction. Many carpetbaggers were said to have moved South for their own financial and political gains. Scalawags were white Southerners who cooperated politically with black freedmen and Northern newcomers.

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5 0
3 years ago
In chickens, having feathers on legs is dominant to having featherless legs. In a population of 200 chickens, 128 have featherle
Neporo4naja [7]

Answer:

64

Explanation:

Since the population is in Hardy-Weinberg equilibrium and the equilibrium is defined by the equation

p² + 2pq + q²

where the frequency of the homozygous dominant allele F ( feathers on the leg ) = p²,

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F (q²) = 128/200 = 0.64

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2pq = 2 × 0.2 × 0.8 = 0.32

number of chickens that are heterozgous for the feathered leg allele = 0.32 × 200 = 64

3 0
3 years ago
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