Multiple Choice
Which of the following is NOT a nutrient required by plants?
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4. Biomolecules
Introduction to Biomolecules
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The molecular shape of a biological molecule is important because:
A
it only affects the molecule's color.
B
it is determined solely by the molecule's atomic mass.
C
it has no effect on the molecule's function.
D
it determines how the molecule interacts with other molecules.
Verified step by step guidance1
Understand that the molecular shape of a biological molecule is determined by the arrangement of its atoms and the bonds between them, which is influenced by factors such as bond angles, bond lengths, and electron pair repulsion (VSEPR theory).
Recognize that the molecular shape is critical for the molecule's function because it determines how the molecule interacts with other molecules, such as enzymes binding to substrates or hormones binding to receptors.
Consider examples in biology, such as the lock-and-key model of enzyme activity, where the enzyme's active site must have a specific shape to bind to its substrate effectively.
Eliminate the incorrect options by reasoning: molecular shape does not solely affect color, is not determined only by atomic mass, and does not have 'no effect' on function, as molecular interactions are shape-dependent.
Conclude that the correct answer is: 'it determines how the molecule interacts with other molecules,' as molecular shape is essential for biological specificity and function.
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