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denis23 [38]
3 years ago
9

More than half a century ago, two cell biologists published details of their research involving isolated membrane vesicles from

chloroplasts. Normally, the fluid inside these vesicles is near neutral. In an experiment, these membrane vesicles were soaked in an acidic solution (pH 4) until the inside of the vesicle also became pH 4. Based on the details provided in this scenario, by what mechanism could hydrogen ions have crossed the vesicle membrane, and what do you think happened at the molecular level?
Biology
1 answer:
fiasKO [112]3 years ago
5 0

Answer:

Plasma membrane is the semi-permeable membrane that allow the movement of some selected particles only against the concentration gradient or along the concentration gradient.

Different substances can be move through the diffusion, active process and passive process. The hydrogen in the vesicle has been moved through the facilitated diffusion.  In this process, the hydrogen ions will move along the concentration gradient without the requirement of energy but requires the channel protein for its transport.

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Question 4 Unsaved
Alex

The correct answer is the mall directory.  

Like nucleus that stores genetic material in the form of DNA, the directory of mall stores all the major information of the mall, that is, the directory tells each and every information of the mall.  

Apart from storing hereditary material of the cell, that is, DNA, the nucleus also performs various activities of the cell that comprises intermediary metabolism, growth, reproduction, and protein synthesis. Only the eukaryotes exhibit a nucleus.  


3 0
3 years ago
The process of photosynthesis can be represented by the chemical formula
lakkis [162]

Answer:

Photosynthesis is defined as the process by which plants make their own food in the presence of sunlight by utilizing water and carbon dioxide and produces energy.

The whole of process of photosynthesis can be represented by the following chemical formula:

6CO2 + 6H2O + sunlight energy = C6H12O6 + 6O2

CO2 - carbon dioxide

H2O - Water

C6H12O6 - Glucose

O2 - Oxygen

During photosynthesis glucose is formed from water and carbon dioxide and produces energy which is further converted into pyruvate that releases adenosine triphosphate (ATP) through cellular respiration. Oxygen is also formed.

The process takes place in two sequential stages  Light dependent reactions and  light-independent reactions.

7 0
3 years ago
4. This photograph was taken in 2004, 24 years after Mount Saint Helens erupted. Compare and contrast this photo with the previo
Iteru [2.4K]
The eruption of Mount Saint Helens has proved to have dramatically change the abiotic and biotic factors of its environment. As what was shown in the image just  24 years from its eruption, we can already observe that animal life began to populate the region due to its sufficient vegetation.
6 0
3 years ago
4. In a class experiment to determine information about free-fall acceleration, a watermelon and a pumpkin are each set to fall
bogdanovich [222]

A)

Answer: They will fall at the same time.

Explanation: This is a free fall equation. Free fall equations don't use other factors such as air resistance or wind.

B)

Answer: 15m

Explanation:

Given: Vi = 10m/s

           t = 1s

           a = 10m/s/s

The equation you need to use is d = Vit + 0.5at^2

d = Vi t + 0.5 a t^2

d = (10 m/s) (1 s) + 0.5 (10 m/s^2) (1 s)^2

d = (10 m) + 0.5 (10 m/s^2) (1 s)^2

d = (10 m) + (5 m/s^2) (1 s)^2

d = (10 m) + (5 m/s^2) (1 s^2)

d = (10 m) + (5 m)

d = 15 m

7 0
3 years ago
If you were to view a bacteria cell, a protist cell and a fungi cell under the microscope, which one(s) would contain a nucleus?
Airida [17]
I think fungi and bacterial cell both have nucleus which can be seen under microscope
5 0
3 years ago
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