Multiple Choice
Free radicals,unpaired electrons,can cause aging because
A) they collect in the organs and skin,forming large molecules that interfere with organ function.
B) they bond with molecules that are nearby,like DNA and proteins,causing damage to the molecule.
C) unpaired electrons pair up together and attack DNA.
D) free radicals seek to free other electrons so that all electrons are stripped from DNA.
E) they speed up metabolic processes,causing the organs to wear out faster.
Correct Answer:

Verified
Correct Answer:
Verified
Q12: Milk production is triggered in breasts following
Q13: During which stage of birth is the
Q15: Researchers have discovered _ that determine the
Q16: During the _ month,the fetal heartbeat is
Q18: The neural tube of vertebrates develops during
Q20: Which statement is NOT correct about the
Q21: The hormone _ from the _ causes
Q22: A pregnancy test is based on the
Q32: During which stage of labor will the
Q60: What role does the acrosome play in