Sickle cell anemia is a genetic disease with severe symptoms, including pain and anemia. The disease is caused by a mutated version of the gene that helps make hemoglobin a protein that carries oxygen in red blood cells. People with two copies of the sickle cell gene have the disease.
A point mutation that does not result in a change to the amino acid coded for is said to be a synonymous mutation.
There is a change in the DNA sequence which codes for the amino acid in the sequence for protein but the amino acid that is being encoded does not change. Redundancy occurs in the genetic code which means multiple codons can code for the same amino acid but the change or the mutation occurs at the third position of the codon and the amino acid to be incorporated remains same at the particular position of the protein sequence.
Answer:
Option (4) weakening bonds in reactants
Explanation:
Enzymes increase the rate of chemical reactions by reducing the amount of activation energy needed for reactants to start reacting
Your answers would be:
1. ---- B. A cell cannot be subdivided into smaller units that maintain the living state.
2. ---- The organism is a eukaryote because it has a nucleus.
3. ---- D. Water would flow into them because they are hypertonic to external environment.
If you want to know why:
1. The cell is the basic unit of life or in other words, its the smallest unit that makes up a living thing. It does not subdivided further if you are talking about sustaining life. Yes, it is made up of smaller units of organelles, but these organelles work together as a single unit (as a cell), to do life sustaining processes.
2. The organism is a eukaryote because of the presence of a nucleus. This is one of the main features of a eukaryote that differentiates it from a prokaryote. Prokaryotes to not have a true nucleus.
3. Water would flow into them, causing the cell to swell and eventually burst if the concentration of solutes would not even out before then. The process of osmosis is what brings the water into the cell. The cell would have a higher solute concentration than freshwater. Through osmosis, the water would then go to the area of higher concentration, which would be the cell.