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irakobra [83]
3 years ago
6

A large volcanic eruption can produce a cloud of ash that can impact the world's climate for some time. A cloud of ash that bloc

ked out the sun for four months would MOST LIKELY have which of these effects?
A) higher temperatures on Earth and increased rates of photosynthesis
B) large amounts of precipitation and flooding of coastal areas
C) lower temperatures and slower rates of plant growth
D) high rates of extinction among reptiles and amphibians
Biology
2 answers:
xeze [42]3 years ago
7 0

Answer: C

Explanation:  ash prevents sunlight from reaching the earths surface therefore lowering the temperature.

Natali5045456 [20]3 years ago
6 0
The answer is C- lower temperatures and slower rates of plant growth
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The Km of your favorite enzyme that operates by normal Michaelis-Menten kinetics is 10-6 M. You start off with a substrate conce
swat32

Answer: (a) 0 no free enzyme left

(b) 10^-9M

Explanation:

ANSWER:

Given that

Kcat = 10 sec-1

Km = 10^-6 M

[S] = 10^-3 M

[Enzyme] = 10^-9 M

The reaction follows the following path-

Enzyme (E) + Substrate (S) <=> ES complex -> E + Product (P)

According to the improved model of Michaelis-Menten kinetics, upon addition of substrate and the enzyme, instead of dynamic equilibrium, a steady state is reached. The time taken is very less, almost instantaneously (since Kcat is much higher than the concentrations we are dealing with (10 per second! Whereas we are dealing with concentrations as low as 10-9).

In this steady state, the Enzyme and substrate instead of existing individually, exist as an Enzyme-Substrate complex, or ES complex.

Physically, Km is a measure of how well substrate complexes with an enzyme, i.e. It's binding affinity.

You can imagine this as if 1 unit of the substrate can bind to "Km" units of Enzyme. For the give conditions, 1 M of the substrate requires 10^-6 M enzyme for complete binding. So, 10^-3 M of the substrate will require 10^-3 x 10^-6 = 10^-9 M of the enzyme, which is the exact amount of enzyme added to the reaction mixture.

So it is safe to assume that when the steady state is reached, all of the enzyme is bound to the available substrate producing the ES complex with the concentration equal to the limiting reactant, i.e. the enzyme = 10^-9 M

Hence, there will be no free enzyme left after the short duration of the reaction. And the concentration of the ES complex will be 10^-9 M

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According to the universal law of gravitation _____.
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Gravity only depends upon the mass of an object. 
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All of earths water, land, and atmosphere within which life exists is known as
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ANSWER ASAP: In a population of 500 squirrels, the per capita birth rate in a particular period is 0.08and the per capita death
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Answer:

A. -0.04

B.40

C. 60

Explanation:

.08-.12 =-.04

.08*500=40

,12*500 = 60

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Why must the formulas of hydrates have the number of water molecules as whole number integers?
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The formula for hydrate indicates the number of water molecules that are attached to each formula unit of the compound. Forexample, nickel (II) sulfate hexahydrate is a green/blue solid that has six water molecules included in the crystal foreach Ni2+and each SO42-ion.Many common minerals are

<h3>What is a hydrate ?</h3>

Any compound containing water in the form of H2O molecules, usually, but not always, with a definite content of water by weight.

  • The best-known hydrates are crystalline solids that lose their fundamental structures upon removal of the bound water.

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