QQuestionBiology
QuestionBiology
Select all that are monomers. (Check all that apply.)
A. A nucleotide
B. A strand of DNA
C. An amino acid
D. Glucose
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Answer
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Step 1:I'll solve this step by step, identifying which options are monomers.
Step 2:: Understand the definition of a monomer
A monomer is a small molecular unit that can bind with other identical molecules to form a polymer (a larger, more complex molecule).
Step 3:: Analyze Option A - Nucleotide
- $$\therefore$$ Nucleotide is a MONOMER ✓
- A nucleotide is a single molecular unit composed of: * A sugar * A phosphate group * A nitrogenous base - Nucleotides are the building blocks of nucleic acids like DNA and RNA
Step 4:: Analyze Option B - DNA Strand
- $$\therefore$$ DNA Strand is NOT a monomer ✗
- A DNA strand is a long polymer made of many nucleotide monomers - It is NOT a monomer itself, but a polymer
Step 5:: Analyze Option C - Amino Acid
- $$\therefore$$ Amino Acid is a MONOMER ✓
- An amino acid is a small molecular unit with an amino group and a carboxyl group - Amino acids are the building blocks of proteins
Step 6:: Analyze Option D - Glucose
- $$\therefore$$ Glucose is a MONOMER ✓
- Glucose is a simple sugar (monosaccharide) - It can link together to form more complex carbohydrates
Final Answer
A, C, and D are monomers.
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