The skeletal system performs four of the following functions. Which is NOT one of the skeletal system’s functions?
a. supporting and protecting body parts
b. being a site for muscle attachment
c. producing red blood cells
d. maintaining body temperature
e. storing minerals
ANSWER: d
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____ is the first enzyme to synthesize a nucleic acid at a replication fork
Fill in the blank with the appropriate word.
RNA can be used as a template for the
production of DNA through the action of a. DNA polymerase. b. RNA polymerase. c. reverse transcriptase. d. ligase. e. restriction endonuclease
Which of the following covers compact bone and functions in bone repair and growth?
A) diaphysis B) epiphysis C) periosteum D) endosteum
Surprising new evidence has shown that, in some cases, environment factors can modify chromosomes in such a way that changes the expression of genes without changing themselves or any part of the DNA sequence. These modifications are called epigenetic effects. Epigenetic effects can sometimes even be passed from generation to generation. In what way would this kind of "inheritance" be an exception to Mendel's laws?
A. According to Mendel's laws, the effects of our environment are not passed on to the next generation. B. Since they are scientific laws, Mendel's laws can't be violated even if there is new evidence to the contrary. C. These effects must be caused by mutations. D. Mendel's laws apply only to pea plants, not all sexually reproducing organisms.