Multiple Choice
In the respiration reaction
A) oxygen combines with such biological molecules as DNA.
B) CO2 combines with H2O.
C) CO2 combines with the carbon in such biological molecules as glucose.
D) carbon combines with such biological molecules as DNA.
E) oxygen combines with the carbon in such biological molecules as glucose.
Correct Answer:

Verified
Correct Answer:
Verified
Q2: Chemically, helium is<br>A) an isotope.<br>B) a compound.<br>C)
Q3: According to the atomic materialist philosophy, certain
Q4: A feature of the quantum model of
Q5: What is the similarity between burning and
Q6: At the microscopic level, the difference between
Q7: Comparing the size of a wavelength of
Q8: Air is composed mainly of<br>A) O<sub>2</sub>.<br>B) N<sub>2
Q9: The distance to the sun is about
Q10: Suppose that a particular chemical substance is
Q11: The reverse of the photosynthesis reaction is<br>A)