Answer:
Silent mutations do not affect protein function
Explanation:
A mutation is defined as any alteration in the genetic material of a cell of a living organism. Moreover, a silent mutation refers to any mutation that does not alter the phenotype of the cell/organism (they are evolutionary neutral mutations). Silent mutations are base substitutions that do not alter the amino acid sequence of the resulting protein, and therefore these mutations do not alter protein function.
Answer:
by finding the half life of the rock, or radioactive dating of the rock, and the fossil should be as old as the rock
water can<em> </em><em>exist</em><em> </em><em>in</em><em> </em><em>three</em><em> </em><em>states</em><em>;</em><em> </em><em>liquid</em><em>,</em><em> </em><em>solid</em><em> </em><em>and</em><em> </em><em>gases</em><em>.</em>
Explanation:
At temperature below zero degree Celsius, water exists as a solid but as it absorbs temperature from Its surroundings, it undergoes melting and turns into liquid water. More application of heat makes it boil leading to the evaporation and vapourisation of water molecules( note: evaporation occurs at all temperature).
Answer:
If a DNA strand has 17% Thymine (T) the percentage of the other nitrogenous bases will be 33% of Guanine (G), 33% of Cytosine (C) and 17% of Adenine (A), according to Chargaff's law.
Explanation:
The percentage of nitrogenous bass in a DNA strand can be established by knowing the percentage of one of the bases present in the molecule, in this case knowing that Thymine corresponds to 17% of bases.
DNA has the nitrogenous bases adenine (A), guanine (G), thymine (T) and cytosine (C). The bases of one chain are matched with the bases of another, according to the complementarity of the nitrogenous bases, where:
- <em>Adenine is complemented with thymine A=T</em>
- <em>Guanine is complemented by cytosine G≡C</em>
According to this, DNA molecule there is as much T as A, and an equal amount of G and C, and the percentages of nitrogenous bases can be calculated according to Chargaff's rule.
Chargaff deduced that<u> in a DNA molecule the ratio of purine:pyrimidine is 1:1, so there must be the same amount of thymine as adenine and a similar amount of guanine for the cytosine</u>, according to the complementarity of the bases.
Calculating the percentages, according to the law of the base pair, if in a DNA chain there is 17% of T, in the molecule there is:
- <em>A = 17 %</em>
- <em>C = 33%</em>
- <em>T = 17%</em>
- <u><em>G = 33%</em></u>
- <em>Total ..... 100%</em>
D. Paleontologist
Hope this helps