Which of the following causes a gene to be effectively "turned off?"
A. DNA methylation
B. Histone modification
C. Gene expression
D. RNA interference
Answer: A
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Donald and Daisy have just become first-time parents. If they are like more couples in this situation, you would expect that they
a. have taken on the gender role of the opposite sex (e.g., Donald has become more feminine). b. have a lot more time to devote to each other. c. are feeling little joy concerning the birth of their baby. d. have added new roles that complicate their lives.
Learned helplessness is demonstrated in laboratory animals by a. creating aversive stimuli (such as electrical shocks to the foot) that the animal can control. b. creating aversive stimuli (such as electrical shocks to the foot) that the animal cannot control. c. creating pleasant stimuli (such as a food pellet) that the animal cannot control
d. creating pleasant stimuli (such as a food pellet) that the animal can control.
When deciding between playing a lottery with an 80% chance of winning $4,000 or receiving $3,000 outright, most people choose the _____ because of the _____.
A) lottery; preference for variable rewards B) lottery; rational choice theory C) $3,000; sunk-cost fallacy D) $3,000; certainty effect
Hyperthymesia might be associated with differences in the
A. anterior cingulate cortex (ACC). B. hypothalamus. C. thalamus. D. amygdala.