DNA, genes and chromosomes Quiz
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5 questions, one answer each
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1. Which describes the DNA in a chloroplast?
- A. Long, linear, with histones
- B. Short, circular, no histones
- C. Long, circular, with histones
- D. Short, linear, with histones
2. A gene is best defined as:
- A. A sequence of three bases coding for an amino acid
- B. A whole DNA molecule
- C. A base sequence of DNA coding for a polypeptide or functional RNA
- D. A sequence of amino acids
3. Which term describes the position of a gene on a chromosome?
- A. Exon
- B. Locus
- C. Intron
- D. Histone
4. Which is found within a eukaryotic gene and does not code for amino acids?
- A. Exon
- B. Locus
- C. Intron
- D. Histone
5. A gene has exons totalling 300 bases and introns totalling 900 bases. What percentage of the gene is coding?
- A. 25%
- B. 33%
- C. 75%
- D. 300%