The genes for hemoglobin ____
a. are found only in red blood cells
b. are never regulated
c. contain only introns
d. are turned off in a small percentage of body cells
e. are found in all body cells
ANSWER: e
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The genetic material (DNA) of eukaryotes is organized into
(a) centrioles. (b) spindles. (c) chromosomes. (d) microtubules.
Evolutionary biologists find the deep sea interesting because
a. of the unusual environmental conditions. b. of the abundance of organisms. c. the environment has remained stable for 100 million years. d. the environment is constantly changing due to continental drift.
Short, noncoding, guanine-rich DNA sequences found in the center of chromosomes are called
telomeres. __________________ Indicate whether the statement is true or false.
Chlorine has an atomic number of 17, and argon has an atomic number of 18. From this information alone, you can predict that:
A) argon has more neutrons than chlorine. B) argon is more chemically reactive than chlorine. C) chlorine has more neutrons than argon. D) chlorine is more chemically reactive than argon. E) argon will more readily ionize than chlorine.