QUESTION 6 Two chambers, X and Y, are separated by a semi-permeable membrane that allows water and urea, but not glucose, to pass through. At the start, chamber X contains a solution of urea in wate and chamber Y contains a solution of glucose in water. The molarity (measure of concentration) of urea in chamber X is the same number as the molarity of glucose in chamber Y. Which of the following will occur after sufficient time? There will be overall diffusion of glucose from X to Y until glucose concentration in Y exceeds glucose concentration in X. There will be overall diffusion of glucose from X to Y until glucose concentration is equal in both chambers. There will be overall diffusion of glucose from Y to X until glucose concentration in X exceeds glucose concentration in Y. O There will be overall diffusion of glucose from Y to X until glucose concentration is equal in both chambers. O Glucose will not diffuse across the membrane. 0 0 0 о
Nucleotides
It is an organic molecule made up of three basic components- a nitrogenous base, phosphate,and pentose sugar. The nucleotides are important for metabolic reactions andthe formation of DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).
Nucleic Acids
Nucleic acids are essential biomolecules present in prokaryotic and eukaryotic cells and viruses. They carry the genetic information for the synthesis of proteins and cellular replication. The nucleic acids are of two types: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The structure of all proteins and ultimately every biomolecule and cellular component is a product of information encoded in the sequence of nucleic acids. Parts of a DNA molecule containing the information needed to synthesize a protein or an RNA are genes. Nucleic acids can store and transmit genetic information from one generation to the next, fundamental to any life form.
A semi-permeable membrane, also known as a selectively permeable membrane or a semipermeable membrane, is a type of membrane that allows certain substances to pass through while blocking others based on their size, charge, or other specific properties. This selective permeability is crucial in various biological and chemical processes.
The primary characteristics of a semi-permeable membrane are:
1. **Selective Permeability:** It selectively allows the passage of some molecules or ions while restricting the passage of others. The selectivity depends on the membrane's specific properties.
2. **Size-Based Separation:** Many semi-permeable membranes are designed to allow smaller molecules or ions to pass through, while larger ones are blocked. This is often based on the size of the pores or channels in the membrane.
3. **Charge-Based Separation:** In some cases, membranes are selective based on the charge of the particles. For example, ion-selective membranes can allow the passage of only positively charged ions (cations) or negatively charged ions (anions).
4. **Permeability to Solvents:** Most semi-permeable membranes allow solvents like water to pass through freely, while solutes (dissolved substances) may have restricted passage.
5. **Applications:** Semi-permeable membranes are used in various applications, including biological systems like cell membranes, artificial organs, dialysis filters, and in chemical processes like filtration and separation.
One common example of a semi-permeable membrane is the cell membrane in living organisms. It allows essential molecules like water and certain ions to pass through while preventing the free movement of larger or charged molecules. Another example is the dialysis membrane used in kidney dialysis machines to remove waste products from the blood while retaining essential components.
The selectivity of a semi-permeable membrane can be based on the specific needs of a particular application, making it a valuable tool in various fields of science, medicine, and industry.
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