Biochemistry Final Exam 225 solutions correct and complete 100%.

2025-2026 Biochemistry Final Exam 225
solutions correct and complete 100%.
2025-2026 Biochemistry Final Exam 225
solutions correct and complete 100%.
What are the three things biochemists study? - ANSWER 1. the relationship between structure and
function of a biomolecule

2. chemical reactions of organisms (metabolism)

3. communication with and among organisms (chemical messengers)



Which protein is found in lightening bugs to produce light? - ANSWER luciferin



How many elements are found in living organisms? - ANSWER 30 or less



What type of elements do you find in living organisms? - ANSWER smaller, non-metal elements



what are the bulk elements? - ANSWER C, N, O, Ca, H, Na, K, P, S, Cl



Why are smaller elements preferred? - ANSWER because they can create stable, covalent bonds. There
is significant e- sharing which means the bonds are harder to break



Are larger elements essential? - ANSWER yes! although they don't form stable, covalent bonds, the
metals and transition metals can help with other essential processes like iron transporting oxygen



why is water considered the medium of life? - ANSWER because it makes up 70% or more of living
organisms and is found both inside and outside of the cell



What is the bond angle of bent? - ANSWER 104.5



What is the bond angle of linear? - ANSWER 180

,2025-2026 Biochemistry Final Exam 225
solutions correct and complete 100%.

Trigonal planar? - ANSWER 120



Trigonal pyramidal? - ANSWER 107.5



Tetrahedral angle? - ANSWER 109.5



How is the bond angle created? - ANSWER by the repulsion of e-



Why is carbon so special? - ANSWER it can form covalent bonds in a unique way to make polymers
(chains) and cyclic compounds



what does inorganic chemistry study? - ANSWER minerals, metals, and non-organic compounds



what is an advantage of a cyclic compound? - ANSWER rigidity for maintaining shape and building
structures



Chemical and condensed formula for methane - ANSWER CH4

CH4



Chemical and condensed name for ethane - ANSWER C2H6

CH3CH3



Chemical and condensed name for propane - ANSWER C3H8

CH3CH2CH3



Chemical and condensed name for butane - ANSWER C4H10

CH3CH2CH2CH3

, 2025-2026 Biochemistry Final Exam 225
solutions correct and complete 100%.

Chemical and condensed name for pentane - ANSWER C5H12

CH3CH2CH2CH2CH3



What does the chemical formula show? - ANSWER elemental composition



What do we see in a condensed formula? - ANSWER the structure and bond placement of a molecule



what is a functional group? - ANSWER a specific arrangement of atoms that defines the properties



Carboxylic acid group - ANSWER COOH



What is a biomolecule? - ANSWER molecules that are part of the cell or excreted by the cell



what is a macromolcule - ANSWER a large biomolecule (5,000g/mol or greater)



what is a monomer? - ANSWER a single unit



what are the three main types of macromolecules? - ANSWER carbohydrates, proteins, and DNA



what is a supramolecular complex? - ANSWER two or more macromolecules together



why is the cellular membrane important? - ANSWER it separates non-life from life, it defines the space
that cellular processes occur, and it is flexible for changes in the environment. It allows cells to take up,
store, and use nutrients when needed



what are prokaryotes? - ANSWER bacteria and single celled organisms