13. which of the following statements is
true of tumor suppressors?
o a. they're proteins that destroy
cancerous cells when they form.
o b. they're enzymes that destroy
cancerous cells when they form.
o c. they're inhibitors that limit the
multiplication of cancer cells.
o d. they activate substrates that bind to
the active site of a substrate.

2. cheryl hears a new song on the radio every day during the week on her commute to work. surprisingly, when the song comes on at a party on saturday night, she knows most of the words without trying. describe the three ways that we use cognition to learn without reinforcement. which type of cognitive learning without reinforcement best explains how cheryl knew the song lyrics? explain your answer.

Which allele is expressed in the first-generation offspring of parents that have two different traits? a. the segregated allele b. the true-breeding allele c. the recessive allele d. the dominant allele

What name is given to the process in which a strand of dna is used as a template for the manufacture of a strand of pre-mrna?