Answer:
c. uracil
Explanation:
uracil is not found in DNA. the missing base would be thymine
Answer:
B. 
Explanation:
The unit for rate is M/s while the unit for each molecule should be M. You can find the unit for k by putting the units for rate and the molecules into the equation
rate= k{X][Y]
M/s= k *
* 
k= (M/s) / (
)
k= 
You can also use this predetermined formula to solve this problem faster: k= 
Where n is the number of molecule. There are 3 molecule(2X and 1Y) so n=3, so
k= 
k=
=
= 
Explanation:
I think you wanted to ask what is the meaning by the term alloy:
alloy is a metallic substance which is composed of two or three elements, as either a compound or solution..
It tell us the most accurate time u can get out of a clock