Which of the statements below is true about the alleles for eye color in fruit flies?
A)
The alleles for eye color produce the same phenotype.
B)
The small change in the DNA sequence causes the allele to produce a different protein, resulting in the production of white eyes instead of red eyes in the fruit fly.
C)
Changes in the sequence of DNA bases in a gene do not contribute to genetic variation in the fruit fly population
Answer:
The correct answer would be B) The small change in the DNA sequence causes the allele to produce a different protein, resulting in the production of white eyes instead of red eyes in the fruit fly.
The amino acid sequence of any protein is determined by the codon sequence of the mRNA which is in turn determined by the nucleotide sequence of the DNA.
Thus, if the nucleotide sequence of the DNA is changed, it will result in the change of amino acid sequence of the protein.
It may result in the change of the structure as well as the function of the protein.
Thus, if the sequence in the gene is changed slightly, it would not result in the production of protein required for a red color trait.
Hence, the eye color of the fruit fly would change to white.
The right answer is the activation energy.
The catalyst increases the reaction rate by introducing new reaction paths (mechanism), and lowering its activation energy, or activation Gibbs free energy. By doing this it can increase the speed, or lower the temperature of the reaction. It is important to note that the catalyst does not alter the total Gibbs free energy of the reaction which is a system state function and therefore has no effect on the equilibrium constant.
Answer : The correct option is, the activation energy
Explanation :
Activation energy : Activation energy is defined as the minimum amount of energy absorbed by the reactant molecules so that their energy becomes equal to the threshold energy.
During the chemical reaction, the reactants react to form product. When a catalyst is added to a chemical reaction then the reaction becomes faster that means the rate of reaction increases and the activation energy decreases.
In the given diagram, 'G' is the activation energy without catalyst and 'H' is the activation energy with catalyst.
The energy diagram is shown below.
environmental conditions
Answer: The desert ecosystem.
Explanation: The desert ecosystem because they have adapted to live without to much water and in heat, so they should be more resilient in a change because they still don't have the need drink to much water.