A group of DNA nucleotides that contains the information to produce a single protein is a

A. gene.
B. promoter.
C. base.
D. codon.


Answer: A

Biology & Microbiology

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The only known eukaryotic-bacterial symbioses are the two that explain the development of the chloroplast and mitochondria

A. true B. false

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The left and right hemispheres of the brain are connected through the ________, a large band of axons

Fill in the blank(s) with correct word

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In humans, if nondisjunction led to an individual with a genotype of XXY, that person would

A. be male because each cell has one Y chromosome. B. display both male and female characteristics. C. not survive. D. be female because each cell has two X chromosomes.

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Endemic infections

A) are infections that are believed to be cured and wiped out by the year 2050. B) are routinely detected in a population or region. C) are infections that have only been recorded within the past 1,000 years and not before. D) are isolated infections in a particular population. E) are infections that are life threatening if not treated in a timely manner.

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