The cell membrane protects the inside of the cell from the outside world.
The cell wall protects the plants inside of the cell from the outside world.
Answer:
i think its the first level of that
Answer:
The mutations lie at locations where they don't affect protein sequence due to degeneracy of the genetic code.
Explanation:
Genetic code is the set of the triplet codons each of which code for a specific amino acid. The nucleotide sequence of mRNA is read in the form of triplets during the process of protein synthesis and the respective amino acid is added to the growing polypeptide chain. The genetic code is degenerate. This means that more than one triplet code specifies one amino acid and some amino acids are encoded by more than one codon.
For instance, genetic codes CUU, CUC, CUA, CUG specify amino acid "leucine". Therefore, any change in the DNA sequence that replaces one code for the leucine with another would not affect the amino acid composition of the protein. This would result in the synthesis of proteins with the same amino acid sequence from both the wild type and mutated genes.
The maximum heart rate is calculated by removing the given age from 220. In this case, we are given 15 as the value for age. So, we have: 220 15 = 205.
To calculate the heart rate range, we have to calculate for three zones:
Zone 1= Maximum heart range * 0.6 = 205 * 0.6 = 123.
Zone 2 = Maximum heart range * 0.7 = 205 * 0.7 = 143.5.
Zone 3 = Maximum heart range * 0.8 = 205 * 0.8 = 164.
Therefore, the heart rate range = 123 - 164.
Thus, the correct option is B.
