Which of the following is NOT a term related to information transfer in living systems?
a. genes
b. taxon
c. proteins
d. neurotransmitters
e. hormones
B
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In people with PKU, phenylalanine from dietary proteins cannot be converted to tyrosine
a. True b. False Indicate whether the statement is true or false
If a cell had a single nonfunctional DNA repair enzyme, how would that cell be affected?
A) The cell could not possibly be viable without that DNA repair enzyme. B) Mutations during DNA replication would not be repaired, so replication and therefore division would not be possible. C) The cell's other DNA repair enzymes would most likely compensate and cell viability would be maintained. D) DNA polymerase would re-replicate any damaged regions of DNA.
Which of the following does not contribute to limits on population growth?
a. snakes feeding on mice in a cornfield b. bears having two cubs c. the amount of light for photosynthesis d. a disease-causing organism entering a population e. an increase in the total rainfall in a normally dry environment
What is the distribution of phenotypes from a cross of purple tall pea plants that are heterozygous for flower color and plant height? (Purple is dominant to white; tall is dominant to dwarf.)
A. 27 purple dwarf; 28 purple tall; 31 white dwarf; 29 white tall B. 132 purple tall; 138 white dwarf C. 100% purple tall D. 54 purple tall; 6 white dwarf E. 63 purple tall; 28 purple tall; 27 white dwarf; 7 white dwarf