Please give me the answer to the A-level Biology Question How is the process by which plants turn towards a light source called and what is the role of auxin (IAA) in it?

A-level Biology Help >>>> What is the process through the plants' movements toward a source of light called and what's the role that auxin (IAA) in this process? The process is known as phototropism ('photo'-light"tropism" - the tendency of an animal plant to move or turn when a stimulus is presented'). IAA (Indole Acetic Acid) is a hormone found in plants that is part of a class known as auxins. It is created by mesenchymal cells and is involved during the phototropism process, by encouraging cell extension. Describe and explain the main function of the proximal convolute: when the plant is exposed the light source in a unilateral manner (in other words , illuminated only from one angle) The amount of auxin on the side with shade is increased. The auxin increases the proton pumping in the membranes of adjacent cells, causing these cells to move protons through their surroundings. The pH drop creates optimal conditions for expansins, proteins that work to open the cell walls which in turn encourages the cell's elongation. In the process the uneven development, the portion of the plant's tip is turned towards an energy source. Additionally, this process can also alter the concentration of sodium in a cell, as it affects how protons are moved through its surroundings. How do the components of a plasma membrane affect the movement of sodium ions? By understanding how auxin affects proton movement and how this influences sodium ion influx or efflux, we can gain insight into how the components of a plasma membrane affect the movement of sodium ions, such as How do the components of a plasma membrane affect the movement of sodium ions? Specifically, auxin-induced proton pumping can cause an influx or efflux of sodium ions, resulting in an alteration of sodium concentration. This alteration of sodium concentration can be further affected by how much auxin is present in the cell and how it affects proton movement, thus influencing How do the components of a plasma membrane affect the movement of sodium ions? To understand this further, it is important to consider how auxin-induced proton pumping affects the movement of sodium ions and how this ultimately alters the concentration of sodium in a cell in the inte. For example, if there is an increase in auxin-induced proton pumping, then there will be an increase in sodium ion influx, resulting in an increase in sodium concentration within the cell. Conversely, if there is a decrease in auxin-induced proton pumping, then there will be a decrease in sodium ion efflux, resulting in a decrease in sodium concentration within the cell. Thus, understanding How do the components of a plasma membrane affect the movement o'f sodium ions can help us to understand How is the concentration of sodium altered in a cell in the inte?

Answered by a professional private A-level Biology Tutor

Do you need help to learn, study or revise? Check out our award-winning A-level Biology Tutors

Check out more A-level Biology questions and answers to help you study-

How do I explain the process of Natural Selection?
How do the components of a plasma membrane affect the movement of substances into and out of a cell, and why is this regulation important?
How is the concentration of sodium altered in a cell in the intestines and why is glucose absorption affected?
Describe the basic structure of a cell membrane?
What is the difference between the genotype and the phenotype?
How can additional molecules or ions increase the activity of an enzyme?
Describe and explain the main function of the proximal convoluted tubule in filtration/absorption
What are two protein filaments that interact in the sarcomere to cause muscular contraction?
Describe the similarities between photosynthesis and respiration