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Match the structures (column A) with the functions (column B) Which of the follo

ID: 90497 • Letter: M

Question

Match the structures (column A) with the functions (column B) Which of the following types of bonds can be weakened by water: Covalent, Ionic, hydrogen, hydrophobic, van der waals? Which property (ies) of the water molecule are responsible for the effect of water on some types of Chemical bonds (be specific)? Which property of the water molecules is responsible for their cohesive nature? Discuss the consequence of cohesiveness on the physical properties of water. Using KCI (K^+, CI^-) and Glucose as examples, illustrate the mechanism(s) by which water dissolves salts and polar compounds. Why are carbon-compounds so stable and diverse? What characteristic(s) of carbon permit (s) it to form stereoisomers? What is the salient characteristic of phospholipids that justify their predominance as membrane lipids? Range the following in order of their diffusion rate across a lipid bilayer: Ca^2+, Galactose, O_2, H_2O, steroid hormone. Starting from the monomers (building block), explain the stepwise assembly of a mitochondrion. Discuss the basic principles of macromolecules biosynthesis. Discuss the principle of self assembly and its advantage. Which functional groups are found in all monosaccharides? What is the distinctive characteristic (structural) of an aldose as compared to a ketose? How

Explanation / Answer

8. The water hydrogen bond is the weakest bond than any other bonds.
Water contains tetrahedrally-placed hydrogen bonds forming a network or mesh stretching throughout the liquid which delivers the water's physical properties and a smaller amount of isolated pockets of weakly or broken hydrogen bonds.

9. Cohesiveness in water is the property that makes the water molecules attracted to one another. The oxygen atom of the water molecule has a net negative charge and the hydrogen has a positive charge. The hydrogen from one water molecule is attracted to the oxygen in another and this is responsible for the cohesive property of water.

10. When Kcl dissolves in water, it breaks the ionic bond which splits up the salt into So K+ and Cl-. The Oxygen in the water molecules will surround the K+ and the hydrogen will surround the Cl-, due to their electrostatic forces of attraction leaving the ion encapsulated in spheres of hydration which prevents the ions from forming an ionic bond.

When glucose dissolves in water by forming hydrogen bonding. Glucose contains 5 hydroxyl groups and they form intermolecular forces of attraction.

Column A        Column B Flagellum       motility Nucleus           store of DNA Intermediate filaments cell shape maintenane Plasma membrane cellular boundary Mitochondria energy generation Chloroplast photosynthesis Ribosomes protein synthesis ER intracellular transport Golgi temporary storage Lysosomes intracellular digestion Microtubules cell shape maintenance Peroxisomes hydrogen peroxide degradation Vacuoles intracellular support