What does each eukaryotic chromosome contain?
a. one long double-stranded DNA molecule
b. one long DNA strand
c. one long sequence of amino acids
d. one single long gene
e. one long ribonucleotide sequence
Answer: a. one long double-stranded DNA molecule
You might also like to view...
Which of the following would NOT be a characteristic of the first life forms on Earth, that is, the very first primitive cells?
A. Oxygen was required for the cells to survive. B. A molecule evolved as a way to store genetic information. C. A barrier made of organic molecules separated the "cell" from the environment. D. Chemical reactions evolved as a way for cells to capture energy from the environment.
Which of the following species concepts might differentiate species on the basis of descent from a common ancestor?
A. Ring species B. Ecological species C. Evolutionary species
A goat eats by pulling a plant out of the ground. What does this best illustrate?
a. parasitism b. predation c. competition d. commensalism e. mutualism
Blood pH is kept near a value of 7.3 - 7.5 because of
a. salts. b. buffers. c. acids. d. bases. e. water.