Which structure establishes where each sister chromatid will end up before a cell divides?
a. the centromeres
b. the spindle
c. the centrioles
d. the Golgi body
e. the centrosomes
B
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You have been asked to synthesize a new isotope for cadmium. Which part of the original atom would you need to manipulate in order to create an isotope?
A. Neutrons. B. Protons. C. Protons and neutrons. D. Electrons.
Which of the following helps to determine the time it takes to empty the stomach?
a. fat content b. acidity of chyme c. both fat content and acidity of chyme d. pepsin concentration e. gastrin concentration
You decide to repeat the Meselson-Stahl experiment, except this time you plan to grow the E. coli cells on light 14N medium for many generations and then transfer them to heavy 15N medium and allow them to grow for 2 additional generations (2 rounds of DNA replication). If the semiconservative model of DNA replication is correct, what is the expected distribution of DNA in the density gradient after two rounds of replication?
A. One band of intermediate density and one band of heavy density. B. One band of intermediate density and one band of light density. C. One band of intermediate density. D. One band of heavy density and one band of light density. E. One band of heavy density.
The bond in which bonded atoms share electrons is called a(n) ________.
A. covalent bond B. ionic bond C. polar bond D. hydrogen bond