17 Questions
What type of structure does the selectively permeable membrane consist of?
Double-layered phospholipid bilayer
In cell chemistry, what process involves the synthesis of molecules from amino acids?
Polymerization
Why is carbon referred to as the 'King of All Elements' in biological molecules?
It is present in DNA, proteins, and fats
What characteristic of water allows it to form a layer or film on surfaces like a Water Strider?
Surface tension
Which principle of Cell Chemistry involves molecules having internal memory to reassemble?
Self-assembly
What property of water allows it to form spheres of hydration around ions?
Hydrogen bonding
Which term best describes hydrocarbons according to the text?
Nonpolar
What is the main function of a SEMI PERMEABLE MEMBRANE as described in the text?
Control the entry and exit of solutes
Why is the amphipathic nature important in cell membranes?
To regulate the entry and exit of molecules
What is responsible for the cohesive nature of water molecules?
Hydrogen bonding
How does water contribute to dissolving a large variety of substances?
By virtue of its polarity
Why do large uncharged polar molecules like glucose and sucrose pass through the membrane slowly?
They form spheres of hydration around them, impeding their movement
What is the role of channel membrane proteins in the movement of solutes across a semi-permeable membrane?
They shield water away from the hydrophobic region, allowing faster movement of solutes
Why is it stated as a blessing that small nonpolar molecules like O2 and CO2 don't need membrane proteins to pass through?
They are integral components of cellular respiration
What is the significance of water being a major component of cells?
Water-based cells allow for various chemical reactions to occur
Why do small uncharged polar molecules like H2O and ethanol move relatively quickly across a semi-permeable membrane?
Their small size allows them to move faster
What is the main reason why ions like Cl-, K+, and Na+ cannot easily pass through a semi-permeable membrane?
Ions form hydration spheres around them, preventing passage
Explore the unique properties of carbon nanofibers, the water strider's behavior due to surface tension, and the 5 principles of cell chemistry including carbon, water, selectively permeable membrane, polymerization, and self-assembly.
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