Use the accompanying figure to answer the following question. The bands in the ladder are in 10-base increments, starting with 10 bases at the bottom and going to 70 bases at the top. Approximately how many bases are in the DNA molecule that the arrow is
pointing to?
A) 30 bases
B) 36 bases
C) 40 bases
D) 44 bases
Answer: B
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The osmotic response element discovered by Ferraris and her colleagues came from the promoter for
a. hexokinase. b. sorbitol dehydrogenase. c. aldose reductase. d. luciferase. e. sorbitase.
To what disease do individuals heterozygous
for cystic fibrosis have increased resistance?
a. hemophilia b. Tay-Sachs c. typhoid d. diptheria e. cholera
Identical twins occur when ________
A) two eggs are released and are fertilized by two different sperm B) one egg is released and is fertilized by one sperm, and the fetus later splits into two C) one egg is released and is fertilized by one sperm, and the pre-embryo later splits into two D) two eggs are released and are fertilized by the same sperm
Two species that have experienced several thousand years of isolation from one another are now incapable of producing viable offspring despite mating efforts. What type of reproductive isolating mechanism developed between the two species?
What will be an ideal response?