Flashcards on DNA, Chromosomes, and Genomes
DNA, Chromosomes, & Genomes: Ultimate Student Guide
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Human genomics
24 cards
Card 1
Question: What is the approximate total length of human genome DNA in nucleotide pairs as given in the content?
Answer: Approximately 3.1 × 10^9 nucleotide pairs.
Card 2
Question: How many nucleotides does the human genome sequence contain that is known precisely (stated), and what is the reported error rate?
Answer: 2.85 billion nucleotides known precisely with an error rate of about 1 in 100,000.
Card 3
Question: Approximately how many protein-coding genes are reported in the table for the human genome?
Answer: About 20,000 (19,116, plus hundreds of genes encoding proteins of 50 amino acids or less).
Card 4
Question: What is the median size (in nucleotide pairs) of protein-coding genes listed?
Answer: 26,000 nucleotide pairs.
Card 5
Question: What is the median length of human messenger RNAs (including 5' and 3' untranslated regions) given in the content?
Answer: 2938 nucleotides.
Card 6
Question: What is the median size of the coding portion of messenger RNAs (in nucleotides) reported?
Answer: 1290 nucleotides.
Card 7
Question: What is the median size of proteins produced from human protein-coding genes (in amino acids)?
Answer: 430 amino acids.
Card 8
Question: What is the smallest and largest reported number of exons per human protein-coding gene?
Answer: Smallest: 1 exon (1068 unspliced genes). Largest: 363 exons.
Card 9
Question: What is the median number of exons per human protein-coding gene and the median exon size?
Answer: Median number of exons: 9.0; Median exon size: 131 nucleotide pairs.
Card 10
Question: What is the median intron size reported for human genes?
Answer: 1747 nucleotide pairs.