Multiple Choice
Which of the following elements are found in the mineral hydroxyapatite, the primary inorganic component of bone?
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1. Introduction to Biochemistry
Characteristics of Life
Multiple Choice
Which type of molecule commonly found in living organisms lacks carbon atoms?
A
Fatty acids
B
Amino acids
C
Glucose (\(C_6H_{12}O_6\))
D
Water (\(H_2O\))
Verified step by step guidance1
Step 1: Begin by understanding the question, which asks for a type of molecule commonly found in living organisms that lacks carbon atoms. Carbon is a key element in organic molecules, so identifying molecules without carbon is crucial.
Step 2: Analyze the options provided: Fatty acids, Amino acids, Glucose (\(C_6H_{12}O_6\)), and Water (\(H_2O\)). Note that fatty acids, amino acids, and glucose all contain carbon atoms as part of their molecular structure.
Step 3: Examine the molecular formula of water (\(H_2O\)). Water consists of two hydrogen atoms and one oxygen atom, and it does not contain any carbon atoms.
Step 4: Recall that water is an inorganic molecule, meaning it does not contain carbon, unlike the other options which are organic molecules and integral to biological processes.
Step 5: Conclude that the correct answer is water (\(H_2O\)), as it is the only molecule in the list that lacks carbon atoms and is commonly found in living organisms.
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