Answer:
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA
is copied or as the result of environmental factors. All BUT ONE of the statements below correctly
describes or explains genetic mutations.
A) Mutation can disrupt normal cell activity and cause diseases, like cancer.
B) Mutations in parents' cells are then passed down to offspring via reproduction,
C) Our cells can recognise any potentially mutation-causing damage and repair it Eliminate
before it permanent.
D) Mutations can occur as the result of exposure to environmental factors such as
smoking, toxins and radiation.
R, S, and T always have the same percentage composition, while X, Y, and Z always have the same percentage composition. Chargaff's rule is then a viable theory that can be used in this situation.
- The DNA of any species of any organism must have a 1:1 stoichiometric ratio of the purine and pyrimidine nucleotides, according to Chargaff's principles.
- More specifically, the ratio of guanine and adenine to cytosine and thymine must be the same. This pattern is present in both the strands of the DNA.
- The formula comes as A + G = T + C = 1
- In this universe there are six base pairs R,S,T,X,Y and Z. composition of R,S and T is always same thus these can be considered the purines.
- The percentage composition of X,Y and Z is always the same thus these can be considered the pyrimidines.
- applying Chargaff's rule to these bases:
R + S + T = X + Y + Z
= 1:1
Thus, the nucleic acid will contain six base pairs where bonds are formed between RX, SY and TZ.
learn more about Chargaff's rule here:brainly.com/question/12148299
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DNA polymerase moves along the old strand in the 3'-5' direction, creating a new strand having the same 5'-3' direction.
The step at which the researchers would do at the end of researching Edna is to amplify the amount of DNA.
Option (d);
<u>EXPLANATION:</u>
- The term EDNA means Environmental DNA.
- Invasive species in the waterway are the waterborne plants and animals who can likely cause effects to the human as well as the environment.
- If researchers want to use eDNA to look for invasive species in the waterway, they will first collect a sample.
- After cutting DNA into pieces, DNA would be precipitated in each sample.
- And in the end, the amount of DNA would be amplified in each sample to understand how it would cause harm to the environment.
