Question

1. segments of dna which contain the code for a protein are called what? 1 point adenine amino acids chromosome codons cytosine dna guanine mrna nucleotides protein thymine transcription translation trna uracil

Explanation:

To solve this, we analyze each option:

• Adenine, Cytosine, Guanine, Thymine, Uracil: These are nitrogenous bases (Adenine, Cytosine, Guanine, Thymine in DNA; Uracil in RNA instead of Thymine), not segments coding for proteins.
• Amino acids: These are the building blocks of proteins, not the DNA segments coding for them.
• Chromosome: A structure made of DNA and proteins, containing many genes, but not the direct code - carrying segments for a single protein.
• Codons: A codon is a sequence of three nucleotides (in DNA or RNA) that codes for a specific amino acid (or signals start/stop). DNA segments with codon - like coding (genes, but more precisely, the coding regions) have codons that code for proteins. Wait, actually, the correct term for the DNA segment that codes for a protein is a gene, but among the options, codons are the triplets that code for amino acids (the building blocks of proteins). Wait, let's re - evaluate:

Wait, the question is about segments of DNA that contain the code for a protein. Let's check the options again:

• DNA: The whole molecule, not a segment coding for a single protein.
• mRNA: It's a type of RNA, not DNA.
• tRNA: Transfers amino acids, not a DNA segment.
• Nucleotides: The building blocks of DNA/RNA, not a segment.
• Protein: The end product, not the DNA segment.
• Transcription: A process, not a segment.
• Translation: A process, not a segment.

Wait, maybe I made a mistake. Wait, the correct answer among the options: Codons are part of the DNA (or mRNA) that code for amino acids. A gene is a segment of DNA that codes for a protein, and genes contain codons. Among the given options, "Codons" is the one that is related to the code for proteins (as they are the triplets that specify amino acids, and a series of codons in a DNA segment (gene) codes for a protein).

Wait, let's check the definitions again:

• Codon: A sequence of three nucleotides that together form a unit of genetic code in a DNA or RNA molecule. So, DNA segments (like genes) have codons that code for the amino acid sequence of a protein. So among the options, Codons is the best fit as it is the part of the DNA (or RNA) that carries the code for (amino acids, which make up) proteins.

Answer:

D. Codons