Which of the following is incorrectly paired?
a. tumor—mass of cells resulting from uncontrolled growth
b. metastasize—cancerous cells spreading throughout the body
c. oncogenes—mutated forms of genes that regulate cell growth
d. tumor suppressor gene—mutated form of a gene that suppresses growth
D
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Oswald Avery found that DNA was necessary and sufficient for bacterial transformation. Which of the following experimental results support this statement (select all that apply)?
A. Removal of DNA from virulent Streptococcus pneumoniae cell extracts eliminated transformation. B. Removal of RNA from virulent Streptococcus pneumoniae cell extracts eliminated transformation. C. Protein alone will cause bacterial transformation to occur. D. DNA alone will cause bacterial transformation to occur.
How do sensory cells communicate different types of information to the brain—touch versus light for example?
A. by firing action potentials at different frequencies in the same neuron B. by firing action potentials of varying amplitudes in the same neuron C. by using different neurons for different stimuli (e.g., light and touch) D. by using different kinds of electrical signals in the same neuron as the information is conveyed to the brain E. by using different kinds of receptor potentials in the same neuron
Which of the following was a successful seed-bearing plant that protected its developing seeds inside cones?
a. green algae b. conifers c. sea-dwelling plants d. flowering plants e. a plant with vascular tissues
An amino acid contains all of the following except
A. a carbon atom. B. an amino group. C. a carboxyl group. D. a variable R group. E. a nitrogenous base.