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What is meant by the term osmosis?
Osmosis is the diffusion of water molecules through a selectively permeable membrane from regions of higher water concentration to regions of lower water concentration. This process is important for maintaining the balance of water and solutes in cells and organisms.
What are eukaryotic genes composed of?
Eukaryotic genes are composed of coding regions called exons, which contain the instructions for making proteins, interspersed with non-coding regions called introns. Regulatory sequences such as promoters and enhancers also play a crucial role in controlling gene expression.
What are the unexpressed non-coding regions of eukaryotic genes called?
Unexpressed non-coding regions of eukaryotic genes are called introns. Introns are present in the initial RNA transcript but are removed during the process of RNA splicing, leaving only the expressed coding regions, called exons, in the mature mRNA.
What happens to introns in eukaryotic mRNA during the process of splicing?
During the process of splicing in eukaryotic mRNA, introns are removed. This leaves only the exons, which are the coding regions, to be joined together to form the final mRNA molecule that will be translated into a protein.
Why do amphipathic molecules form micelles in water?
Amphipathic molecules are by definition those that contain both hydrophobic (water hating) and hydrophilic (water loving) regions. The area of the molecule that likes water tends to stay in the aqueous region whereas the region of the molecules that hates water tends to cluster with other hydrophobic regions. This untimately results in the hydrophobic regions packing together and forming a region that is impervious to water molecules. Such a structure is called a micelle
Why do marine organisms living in polar regions have a very high proportion of cholesterol in their membrane?
Marine organisms living in polar regions have a very high proportion of cholesterol in membranes to keep the membranes more fluid and keep the molecules moving faster because in cold temperature, molecules move slower.
Why does marine organism living in polar regions have high proportion of cholesterol in their membrane?
Marine organisms living in polar regions have a very high proportion of cholesterol in membranes to keep the membranes more fluid and keep the molecules moving faster because in cold temperature, molecules move slower.
What is small organisms that live in the sunlight regions of the oceans?
Small organisms that live in the sunlight regions of the ocean is called Plankton!
What is meant by the term osmosis?
Osmosis is the diffusion of water molecules through a selectively permeable membrane from regions of higher water concentration to regions of lower water concentration. This process is important for maintaining the balance of water and solutes in cells and organisms.
How does eukaryotic and prokaryotic organisms undergo facilitated diffusion?
Diffusion is the ability of molecules to follow a concentration gradient, moving from regions of high to low concentration. For small, nonpolar molecules such as O2, CO2, and some narcotics, they are small enough to slip through the phospholipid bilayer of the plasma membrane. Small, polar molecules such as water, are also small enough to slip through, but because of their polar nature, this movement is impeded by a factor of 1000. What about larger molecules like glucose? These molecules are too big to slip through the phospholipid bilayer, regardless of the concentration gradient. Larger molecules require a protein channel for transport across the plasma membrane. Because the movement will be driven by the concentration gradient, this movement is called facilitated diffusion, to indicate that a protein channel is necessary. Both prokaryotic and eukaryotic cells have protein channels for this purpose.
What do hydrophobic regions of molecules feel?
greasy
What is the process of molecules from an area of high concentration to low?
Diffusion describes the spread of molecules through random motion from regions of higher concentration to regions of lower concentration.
What are eukaryotic genes composed of?
Eukaryotic genes are composed of coding regions called exons, which contain the instructions for making proteins, interspersed with non-coding regions called introns. Regulatory sequences such as promoters and enhancers also play a crucial role in controlling gene expression.
What question did Charles Darwin answer?
Why do different regions have different organisms
What is the attraction between the polar regions of molecules?
Hydrogen Bond
What is the process of molecules spreading from an area of high concentrate to low concentrate?
Diffusion describes the spread of molecules through random motion from regions of higher concentration to regions of lower concentration.
What is the process of molecules spreading from an area of high concentrations to low concentration?
Diffusion describes the spread of molecules through random motion from regions of higher concentration to regions of lower concentration.
