Portage Learning Biochemistry 210: Module 1 Exam -
The Amazing World of Biochemistry questions and
answers 2025\2026 A+ Grade
What are three ways that biochemists study biological organisms?
- correct answer 1. The relationship between structure and function of biomolecules.
2. The chemical reactions of organisms and or metabolism.
3. Communication with and among organisms.
What is the definition of biochemistry?
- correct answer Biochemistry is referred to as the 'chemistry of life' as it investigates how the
properties of organisms relate to their molecules.
What elements are important to human life?
- correct answer Bulk elements and trace elements.
Bulk elements consists of non-metals and trace elements consist of transition metals and metals.
Trace elements are important in small amounts.
What are considered bulk elements?
- correct answer C, H, N, O, P, S, Cl, Na, K, Ca.
What are considered trace elements?
- correct answer Mg, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo, W, Se, I.
, What is another name for firefly?
- correct answer Lightning bug or glow worm. Fireflies are also known to be beetles.
What are the different bond shapes?
- correct answer Linear, Trigonal planar, Trigonal pyramidal, Tetrahedral, Bent.
Linear
- correct answer 180 degrees, sp hybridization.
A straight-line arrangement of atoms.
Trigonal Planar
- correct answer 120 degrees, sp2 hybridization.
A central atom with three bonded groups in a flat, planar structure.
Trigonal Pyramidal
- correct answer 107.5 degrees, sp3 hybridization.
A trigonal pyramidal shape occurs when a central atom forms three bonds and has one lone pair of
electrons.
Tetrahedral
- correct answer 109.5 degrees, sp3 hybridization.
A central atom with four single bonds, forming a 3D tetrahedron.
Bent
- correct answer 104.5 degrees, sp3 hybridization. 120 degrees, sp2 hybridization.
Water: The central atom has four electron domains (two bonded atoms + two lone pairs). The increased
lone pair repulsion further reduces the bond angle from the ideal tetrahedral (~109.5°) to ~104.5°.
The Amazing World of Biochemistry questions and
answers 2025\2026 A+ Grade
What are three ways that biochemists study biological organisms?
- correct answer 1. The relationship between structure and function of biomolecules.
2. The chemical reactions of organisms and or metabolism.
3. Communication with and among organisms.
What is the definition of biochemistry?
- correct answer Biochemistry is referred to as the 'chemistry of life' as it investigates how the
properties of organisms relate to their molecules.
What elements are important to human life?
- correct answer Bulk elements and trace elements.
Bulk elements consists of non-metals and trace elements consist of transition metals and metals.
Trace elements are important in small amounts.
What are considered bulk elements?
- correct answer C, H, N, O, P, S, Cl, Na, K, Ca.
What are considered trace elements?
- correct answer Mg, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo, W, Se, I.
, What is another name for firefly?
- correct answer Lightning bug or glow worm. Fireflies are also known to be beetles.
What are the different bond shapes?
- correct answer Linear, Trigonal planar, Trigonal pyramidal, Tetrahedral, Bent.
Linear
- correct answer 180 degrees, sp hybridization.
A straight-line arrangement of atoms.
Trigonal Planar
- correct answer 120 degrees, sp2 hybridization.
A central atom with three bonded groups in a flat, planar structure.
Trigonal Pyramidal
- correct answer 107.5 degrees, sp3 hybridization.
A trigonal pyramidal shape occurs when a central atom forms three bonds and has one lone pair of
electrons.
Tetrahedral
- correct answer 109.5 degrees, sp3 hybridization.
A central atom with four single bonds, forming a 3D tetrahedron.
Bent
- correct answer 104.5 degrees, sp3 hybridization. 120 degrees, sp2 hybridization.
Water: The central atom has four electron domains (two bonded atoms + two lone pairs). The increased
lone pair repulsion further reduces the bond angle from the ideal tetrahedral (~109.5°) to ~104.5°.
