General Knowledge - Biology - Discussion

Discussion :: Biology - Section 1 (Q.No.6)

6. 

Movement of cell against concentration gradient is called

[A]. osmosis
[B]. active transport
[C]. diffusion
[D]. passive transport

Answer: Option B

Explanation:

Active transport, this is the only transport method that can move species against their concentration gradient (from low to high concentration). Facilitated diffusion only moves species down their concentration gradient from high to low concentration.

Vibhash Kumar said: (Jan 12, 2011)  
Is it like this that the cells move against concentration gradient or the solute or solvent moves against the concentration gradient ? the active transport requires energy which is not mentioned in the question ?.

Rajkumar said: (Jul 21, 2011)  
Active transport is the movement of a substance against its concentration gradient (from low to high concentration). In all cells, this is usually concerned with accumulating high concentrations of molecules that the cell needs, such as ions, glucose, and amino acids. If the process uses chemical energy, such as from adenosine triphosphate (ATP), it is termed primary active transport. Secondary active transport involves the use of an electrochemical gradient. Active transport uses energy, unlike passive transport, which does not use any type of energy. Active transport is a good example of a process for which cells require energy. Examples of active transport include the uptake of glucose in the intestines in humans and the uptake of mineral ions into root hair cells of plants.

Aloysius said: (Apr 21, 2012)  
Explain ceoleterate

Amy said: (May 20, 2012)  
Osmosis is also movement from low concentration to high then what is difference between osmosis and active transport?

Shre said: (Apr 5, 2013)  
Whats the difference between diffusion and passive transport ?

Aditya Jena said: (Aug 1, 2013)  
What is the lightest metal?

Solomon said: (Sep 5, 2013)  
Since osmosis and active are movement of a substance from low to high what is the different?

Shashmitha said: (Sep 26, 2013)  
I think the answer is osmosis because, it also has same features.

As active transport why don't you consider this as a answer please clarify my doubt.

Kritika said: (Nov 23, 2013)  
No the answer is active transport because osmosis refers to movement of water molecules from higher to lower concentration and thus it is not applicable the reverse way. Hence active transport (by means of using ATP) is how plants take in nutrients from the soil when the concentration is already high in their root cells.

Janardan Verma said: (Mar 6, 2014)  
Please tell me. What is the difference between osmosis and active transport?

Ashish Sing said: (Aug 18, 2014)  
Why answer is active transport?

Samson Oluwole said: (Mar 21, 2015)  
Osmosis is the movement of water molecule from higher level to lower level, active transport is the movement of cell to give nutrient to plant.

Sravani said: (May 15, 2015)  
Osmosis is a kind of passive transport. It takes place down the concentration gradient. Similarly diffusion, facilitated diffusion, filtration are also kind of passive transport. The different is osmosis generally means movement of water molecule. Above they mentioned movement of cell against concentration gradient. Osmosis generally occurs in blood cells so it is correct.

Y. Nageswara Rao said: (May 30, 2015)  
I Think it is active transport because osmosis occur in fluid contents or in water but it is too different over here. Due to that I am thinking it is active transport.

Vikash Choubey said: (Aug 16, 2015)  
I thought that this is mainly corporation in our system.

Samuel said: (Jul 13, 2016)  
The right answer is active transport and not osmosis.

Ravi said: (Jul 24, 2016)  
What is the difference between osmosis and active transport?

Aditi said: (Nov 3, 2016)  
@Ravi.

Osmosis is the movement of water from higher concentration level to lower concentration level whereas active transport is the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.

Shafici Ahmed said: (Mar 9, 2017)  
Sometimes, the movement of the cell can cause the highest concentration of cell inside the metal plasma cells.

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