LQB182

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LQB182 Cell & Molecular Biology: Mid-Semester Practice Test| ANSWERS VERIFIED
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november 2022

2022/2023

A+
The charge state of protons, neutrons, and electrons are _______. Correct Answer: positive, neutral, negative, respectively The reactivity of an atom arises from ______. Correct Answer: the existence of unpaired electrons in the valence shell Atomic number indicates _______. Correct Answer: the number of protons Covalent bonds differ from ionic and metallic bonds because in covalent bonding _______. Correct Answer: pairs of electrons are shared
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LQB182 FINAL| QUESTIONS WITH COMPLETE SOLUTIONS
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2

19

november 2022

2022/2023

A+
What are the bonds that hold elements together? From strongest to weakest. Correct Answer: - Covalent bond - Ionic Bond - Hydrogen Bond - Van Der Waal's forces What is one of the main functions of Cysteine as an amino acid? Correct Answer: Formation of Di-sulphide bridges What are the 4 levels of Protein structure? Give explanation/examples of each. Correct Answer: 1. Primary - Simply the unique sequence of amino acids making up the single, linear chain of a polypeptide 2. Seco...
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LQB182 MidSem Exam| PREDICTED QUESTIONS| WITH COMPLETE SOLUTIONS
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15

november 2022

2022/2023

A+
Valance shell Correct Answer: Outermost electron shell and its electrons determine chemical behaviour and bonding Radioactive isotopes Correct Answer: Useful in medical diagnostic tests and in research Atoms can gain or lose electrons Correct Answer: Metals lose electrons and non-metals accept Correct Answer: Anions Correct Answer: negatively charged ions (gain electrons) Cations Correct Answer: positively charged ions (lose electrons) Intramolecular bonds Correct Answe...
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