BIOCHEMISTRY MODULE 1 EXAM PREP
QUESTIONS AND ANSWERS 2026 PRACTICE
SOLUTION VERIFIED RESULTS
◉ Why are smaller elements favored for living organisms?
Answer: They can form stable, covalent bonds
◉ How are strong bonds formed?
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?
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?
Answer: No
◉ Describe the role of Iron as a larger element
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
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 things
Answer: 70%
◉ Some plant species are ___% water by mass
Answer: 90%
◉ What is the "medium" of life and why?
Answer: Water, it is found in all cells and multicellular organisms
◉ What is the shape and bond angle of water? Explain its bond angle
Answer: Water is shown in a BENT structure with 104.5 degree
bond angle due to the repulsion of electrons in chemical bonds.
◉ Name the four common molecular shapes of simple compounds,
their bond angles, and their common description
Answer: Linear: 180 degrees, common in CO2 and triple bonds
QUESTIONS AND ANSWERS 2026 PRACTICE
SOLUTION VERIFIED RESULTS
◉ Why are smaller elements favored for living organisms?
Answer: They can form stable, covalent bonds
◉ How are strong bonds formed?
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?
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?
Answer: No
◉ Describe the role of Iron as a larger element
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
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 things
Answer: 70%
◉ Some plant species are ___% water by mass
Answer: 90%
◉ What is the "medium" of life and why?
Answer: Water, it is found in all cells and multicellular organisms
◉ What is the shape and bond angle of water? Explain its bond angle
Answer: Water is shown in a BENT structure with 104.5 degree
bond angle due to the repulsion of electrons in chemical bonds.
◉ Name the four common molecular shapes of simple compounds,
their bond angles, and their common description
Answer: Linear: 180 degrees, common in CO2 and triple bonds
