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Luba_88 [7]
2 years ago
7

What is the difference between a purine and a pyrimidine?

Chemistry
1 answer:
GalinKa [24]2 years ago
4 0

Answer: Adenine and guanine are the two purines and cytosine, thymine and uracil are the three pyrimidines. The main difference between purines and pyrimidines is that purines contain a sixmembered nitrogencontaining ring fused to an imidazole ring whereas pyrimidines contain only a sixmembered nitrogencontaining ring. They both are types or categories of nitrogen containing bases present in nuclei acids of DNA and RNA.

Purines are 2 Ring or Carbon Ring, Nitrogen containing bases. That consist of these 2 rings next placed next to each other. These examples include - Adenine and Guanine.

Pyrimidines are 1 or single Ring Nitrogen containing structures. There are 3 nitrogenous bases that are categorized as pyrimidines. Cytosine, Thymine, and Uracil.

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YALL I NEED HELP ASAP
masya89 [10]

Answer:

Yes

Explanation:

 

6 0
2 years ago
NH3 is a weak base (Kb = 1.8 × 10–5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.084 M in
kolbaska11 [484]
Answer is: pH of solution is 5,17.
Kb(NH₃) = 1,8·10⁻⁵.
c(NH₄Cl) = 0,084 M = 0,084 mol/L.
Chemical reaction: NH₄⁺ + H₂O → NH₃ + H₃O⁺.
Ka · Kb = 10⁻¹⁴.
Ka(NH₄⁺) = 10⁻¹⁴ ÷ 1,8·10⁻⁵.
Ka(NH₄⁺) = 5,55·10⁻¹⁰.
[H₃O⁺] = [NH₃]  = x.
Ka(NH₄⁺) = [H₃O⁺] · [NH₃] ÷ [NH₄⁺].
5,55·10⁻¹⁰ = x² ÷ (0,084 M - x).
Solve quadratic equation: x = [H₃O⁺] = 6,8·10⁻⁶ M.
pH = -log[H₃O⁺].
pH = -log(6,8·10⁻⁶ M) = 5,17.
7 0
3 years ago
Name two gases that are found in air?
Diano4ka-milaya [45]

Answer:

Oxygen and Nitrogen

hope this helps

7 0
3 years ago
Read 2 more answers
Convert 43 miles into feet
docker41 [41]

Answer:

43 miles is 227040

hope this helps

5 0
3 years ago
Find the final pressure of gas at 150k. If the pressure of the gas is 210 kPa at 120 K.
katrin [286]
Since the volume is constant,
p1/t = p2/ t
210/120 = p2/150
p2= 262.5kpa
4 0
3 years ago
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