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MBB 201 Study Guide - Quiz Guide: Problem Set, Glycosidic Bond, Covalent Bond

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School
Simon Fraser University
Department
Molec Biol & Biochem
Course
MBB 201
Professor
Dr. Stephanie Vlachos

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Document Summary

Mbb 201 problem set 2: for the following statements, answer whether they are true or false. If a statement false, explain why it is false: some atoms are more stable when they lose one or two electrons, even though this means they will have a net positive charge. True: an ionic bond between two atoms is formed as a result of the sharing of electrons. An ionic bond between two atoms is formed when there is a transfer of electrons from one atom to the other. Sharing of electrons between two atoms forms a covalent bond: a disaccharide consists of a sugar covalently linked to another molecule such as an amino acid or a nucleotide. A disaccharide consists of two sugar molecules that undergo a condensation reaction to form a covalent bond (known as a glycosidic bond): enzymes lower the free energy released by the reaction that they facilitate.

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Related Questions


How does the formation of a covalent bond lower the potential energy of the two atoms in the bond? Hints How does the formation of a covalent bond lower the potential energy of the two atoms in the bond?

A)Forming a covalent bond transfers an electron from a metal to a nonmetal, which creates a favorable interaction between the resulting ions.

B)The lowest potential energy occurs when the two nuclei are an optimum distance apart from one another so that they don't repel each other.

C)The potential energy is lower when the valence electrons lie in between the positively charged nuclei than when they are close to only one nucleus.

D)Forming a covalent bond releases electrons from the atoms, which lowers the potential energy of the atoms.

1. True or False. a. A positively charged ion is called an anion. b. If an atom gives up an electron, it creates negatively charged ion. c. Valence electrons are the electrons that are available for bonding and located in the shells closest to the nucleus. d. An ionic bond is the result of electron sharing. e. When atoms gain, lose, or share electrons they do so in order to have an electron configuration of a noble gas. f. As you go across the periodic table left to right, electronegativity will increase. g. The number of valence electrons an atom has is equal to the atomic number. h. Fluorine cannot be the central atom due to the fact that is can only accept 2 electrons. i. When a covalent bond occurs, the atoms overlap one another to create a new orbital. The more overlapping, the stronger the bond. j. A triple bond is considered to be a weak bond.