PORTAGE BIOCHEMISTRYMODULE 1 EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+

Definition of biochemistry Correct Answer: chemistry of life; how properties of organisms relate to their molecules What are the 3 things biochemists study? Correct Answer: 1. The relationship between structure and function of biomolecules 2. Chemical reactions of organisms (metabolism) 3. Communication within and among organisms What are bulk elements? Correct Answer: Elements that are abundant in living organisms What are trace elements? Correct Answer: Elements that are less abundant in organisms but still crucial for life Name the bulk elements (10) Correct Answer: H, Na, K, Ca, C, N, O, P, S, Cl 2 Name the trace elements (13) Correct Answer: Mg, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo, W, Se, I What's another word for a firefly? Correct Answer: Lightning bug Explain the chemical reaction of lightning bugs Correct Answer: The chemical reaction is called bioluminescence. Proteins regulate, produce, and degrade the light-emitting compound called luciferin. Luciferin, when acted upon by a protein, glows as bugs move. This chemical reaction is regulated by the protein (enzyme) called luciferase. How many naturally occurring elements exist? How many are found in living organisms and what kind of elements? Correct Answer: 90 naturally occurring elements, less than 30 elements are found in living organisms. Most of these 30 elements are smaller non-metals. Why are smaller elements favored for living organisms? Correct Answer: They can form stable, covalent bonds How are strong bonds formed? 3 Correct Answer: Strong bonds form by significant overlap of atoms, such as carbon and hydrogen, permitting them to share electrons Why is the strong bond good for living organisms? Correct Answer: The bond that forms requires significant energy to break it. This means the bonds can withstand mechanical and thermal pressures through the growth of hair/skin for protection. Do larger elements form stable covalent bonds? Correct Answer: No Describe the role of Iron as a larger element Correct Answer: Iron has a critical role in hemoglobin for oxygen transport in vertebrates. Forms an ion capable of binding to oxygen. Describe H and O in H2O Correct Answer: Both H and O are found in large amounts. They are small atoms that form strong bonds. When bonded as H2O, they form a small, polar molecule that solvates and dissolves many compounds. H2O makes up ___% or more of living thing