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natta225 [31]
3 years ago
13

Which of the following is an accurate distinction between Bacteria and Eukarya?

Biology
1 answer:
gtnhenbr [62]3 years ago
3 0

<em><u>D. Bacteria do not have membrane bound organelles inside their cells, and eukarya do. </u></em>

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DanielleElmas [232]
True...
it acts as a semi permeable membrane
4 0
3 years ago
Which of these plants most likely contains vascular tissue
malfutka [58]
The stem is the part of the plant which contains vascular tissue. or the piping, of the plant
6 0
3 years ago
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

8 0
3 years ago
Urgent needs an answer now!!!!!!!!!!!!!!!!!!!! Why does it take several redox reactions in a cell to make water from hydrogen an
ycow [4]

Answer:

hydrogen and oxygen combine explosively in a single raction

Explanation:

The reason is Molecules of hydrogen react with oxygen violently to break the initial molecular bonds and form new one between the atoms of the two elements. The reaction results into an explosive release of energy and the production of water because the products of the reaction are at a lower energy level

5 0
3 years ago
True or false
erik [133]

Answer:

True

Explanation:

offspring inherits are most likely inherits from parents.

3 0
2 years ago
Read 2 more answers
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