Exam (elaborations)
BCMB 401: Exam 1 fully solved graded A+
- Course
- BCMB 401
- Institution
- South University
BCMB 401: Exam 1 fully solved graded A+
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BCMB 401: Exam 1Lect. 1 on non-covalent and covalent bonds - correct answer ✔✔:)
Define noncovalent bond and name the four types of noncovalent bonds. - correct answer ✔✔Definition: A noncovalent bond is a type of chemical bond that typically forms between macromolecules. They do not involve sharing a pair of electrons. Noncovalent bonds are used to bond large molecules such as proteins and nucleic acids.
4 types: electrostatic interactions, hydrogen bonds, van der Waals interactions (london dispersion forces), and hydrophobic interactions
Which is stronger, covalent or noncovalent bonds? - correct answer ✔✔Covalent bonds
Why are noncovalent bonds important? - correct answer ✔✔they are crucial for biochemical processes such as the formation of double helix
Water is a ________________ molecule that is capable of _______________ bond interactions. - correct answer ✔✔polar; hydrogen
What is the predominant solvent in biological systems? - correct answer ✔✔Water
Water is an ideal solvent in biological systems because it is cohesive yet dynamic. Explain this concept. - correct answer ✔✔Water is cohesive in the sense that it creates a hydrogen bond network; however, this network is dynamic because these bonds last nanoseconds. They are constantly being broken and reformed.
Water as a biological solvent also leads to the "hydrophobic effect". Explain this term. - correct answer ✔✔The hydrophobic effect is the observed tendency of nonpolar substances to aggregate in an aqueous solution and exclude water molecules. This occurs naturally because disorder is favored in any system per the second law of thermodynamics, so when hydrophobic molecules bond in water, some of the hydrogen bonds formed between the water molecules and the hydrophobic molecules are broken, thus
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