Which of the Following Best Describes Sirtuins

Multiple Choice

Which of the following best describes sirtuins?

A) They are DNA sequences that cap chromosomes and are proposed as being the key components of the stem cell regeneration process, providing a possible avenue to restrain cancer and delay aging.
B) They are unstable oxygen molecules that ricochet around the cells, damaging DNA and other cellular structures.
C) They are a family of proteins that have been proposed as having important influences on longevity, mitochondria functioning in energy, calorie restriction benefits, stress resistance, and cardiovascular functioning.
D) They are tiny bodies within cells that supply essential energy for function, growth, and repair.