Which of the following can be antigens?
A) nucleic acids
B) polysaccharides
C) proteins
D) all of these
D
Environmental & Atmospheric Sciences
You might also like to view...
Why is chemical cycling necessary for life on the earth?
What will be an ideal response?
Environmental & Atmospheric Sciences
The unit 1 ppm is equivalent to which of the following?
A) 1000 ppb B) 0.0001% C) both a and b D) neither a nor b
Environmental & Atmospheric Sciences
There are more people living in Mexico City than in all of Australia.
a. true b. false
Environmental & Atmospheric Sciences
How do we know the outer core of the Earth is molten?
A) By drilling well to the core. B) Because there are volcanoes. C) By measuring the mass of the Earth. D) Because seismic waves do not travel through that boundary.
Environmental & Atmospheric Sciences