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sierram298
13.05.2021 •
Biology
True or False: Purine is connected to pyrimidine using oxygen bonds.
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Ответ:
False
Explanation:
In DNA double helix molecule, there are four types of nitrogenous bases: adenine, guanine, cytosine and thymine. Purines (i.e., adenine, guanine) and pyrimidines (i.e., cytosine and thymine) hold DNA strands together via hydrogen bonds. In base pairing, guanine always pairs with cytosine through 3 hydrogen bonds, while adenine always pairs with thymine by 2 hydrogen bonds. Hydrogen bonds are a type of dipole–dipole interaction where a hydrogen atom is covalently bonded to a very electronegative atom (e.g., Nitrogen or Oxygen).
Ответ:
The correct option is 2.
Step-by-step explanation:
The given data is
x y
5 36
9 64
12 72
18 96
26 141
35 189
The general form of regression line is
From the given picture of graphing calculator, it is clear that the equation of regression line is
Approx the value of a and b upto tenth.
The equation of the line of best fit is y ≈ 5.10x+9.12. Therefore the correct option is 2.