0
What else can I help you with?
Why is the cell membrane semi-permiable?
The cell membrane is semi-permeable because it allows certain molecules to pass through while restricting the passage of others. This selective permeability helps maintain the internal environment of the cell by controlling the movement of substances in and out. It is made up of a phospholipid bilayer with embedded proteins that regulate the transport of molecules.
How are secretory proteins and membrane molecules synthesized?
Protein synthesis begins in the cell nucleus. A given gene (made of DNA) is activated, and it then creates RNA which travels to the ribosomes of the cell, which are essentially microscopic protein factories. The RNA gives the design of the protein, and the ribosomes create the protein based on that design. The raw material for the proteins, which is amino acids, is already present in the cell's cytoplasm.
How does evolution challenge the design argument?
Evolution challenges the design argument by providing a natural explanation for the diversity and complexity of life on Earth without the need for a designer. Through the process of natural selection, organisms adapt and change over time, leading to the development of new species. This natural mechanism of evolution undermines the argument that a designer is necessary to explain the complexity of life.
What are three ways in which you can classify structures?
Structures can be classified based on their function (e.g., residential, commercial, industrial), material composition (e.g., concrete, steel, wood), and design style (e.g., modern, traditional, contemporary).
What is the disadvantage for a through housing joint?
A disadvantage of a through housing joint is that it weakens the structural integrity of the material being joined, as it involves removing material from both pieces to create a slot for them to fit together. This can result in reduced strength and stability compared to other types of joints, such as a dovetail or mortise and tenon joint. Additionally, the exposed edges of the joint may be more prone to damage or wear over time.
How would you design a cell membrane that would allow you to move more material through the membrane faster without taking more space?
One way to increase the speed of material movement through a cell membrane without taking up more space would be to incorporate more channels or transport proteins. These proteins can facilitate the movement of specific molecules across the membrane more efficiently. Another approach could be to increase the fluidity of the membrane by incorporating more unsaturated fatty acids, which would make it easier for molecules to move through the membrane. Lastly, increasing the surface area of the membrane through invaginations or microvilli could also enhance material transport.
What is the term for material that is treated to slow electricity through a circuit without completely inhibiting it?
A resistor or a semiconductor, depending on the design and function. Resistors inhibit current flow, while semiconductors control current flow (transistors are an example of semiconductor devices).
What are the material used to design screw jack?
Cast iron is the material often used to design screw jacks because of its strength.
How does culture technology and material influence the shape the design?
aspect influence the design
What is membrane contactors?
Membrane contactors are devices that combine membrane separation technology with gas-liquid contactors, allowing for efficient mass transfer between two phases without direct mixing. They are commonly used in various industrial processes such as gas absorption, liquid-liquid extraction, and gas stripping. Membrane contactors offer advantages such as high selectivity, reduced energy consumption, and compact design.
Where can see through dresses be bought?
See through dresses can be bought when one goes online to the website of eBay. There one can find a huge selection of see through dresses. Price varies by brand, design and material.
Why does light refract more when passing through a diamond?
Diamond has a higher refractive index due to its dense molecular structure, which causes light to bend more as it passes through the material. This results in the brilliant sparkle and dispersion of colors that diamonds are known for.
How can material with high or low coiefficient of thermal expansion effect design of roof gutter?
How can material with high or low coiefficient of thermal expansion effect design of roof gutter?" How can material with high or low coiefficient of thermal expansion effect design of roof gutter?"
What is the significance of the design and material used for a paperback book cover?
The design and material of a paperback book cover are significant because they help attract readers and protect the book. The design can convey the book's genre or theme, while the material can affect the book's durability and feel.
What are some design options for countertops without backsplash in a kitchen renovation?
Some design options for countertops without backsplash in a kitchen renovation include using a matching countertop material as a backsplash, installing a tile or stone backsplash, opting for a painted or wallpapered backsplash, or leaving the wall bare for a minimalist look.
Do the umbrella's cover allows light to pass through?
Some umbrella covers are made of translucent or sheer material designed to allow light to pass through. However, this can vary depending on the specific umbrella design and material used. It's best to check the specifications or test the umbrella in person to determine if light can pass through.
Why mechanical properties of solid important for design of machines and structures?
One cannot design any machine or structure properly without knowledge of the material physical properties of the materials. Key properties are strength, density, modulus, thermal expansion, and conductivity.
