Which of the following molecules is polar?
A) a
B) b
C) c
D) All are polar.
E) Only A and C are polar.
Question 2
Water, ImageO, and methane, CImage, have about the same mass and differ by only one type of atom. Why is the boiling point of water so much higher than that of methane?
A) The water molecule is less symmetrical than is the methane molecule.
B) The oxygen of a water molecule has two lone pairs of electrons.
C) The electronegativity difference between oxygen and hydrogen is greater than the electronegativity difference between carbon and hydrogen.
D) all of the above
Cellular locations of pattern recognition molecules of the innate immune system
DNA molecules replicate to form identical chromatids
Water Molecules
Two oxygen molecules in van der Waals contact
Electron microscope photo of mRNA molecules being read by ribosomes.