Answer:
Water and polymers.
Explanation:
Dehydration reaction may be defined as the reaction in which a water molecule is released during the process of reaction. Large molecules are joined together by the process of dehydration.
Polymers are formed by reacting the monomers together with a release of small molecules like water. Hence, water and polymers are formed by dehydration reaction.
Thus, the correct answer is option (3).
Answer:
allele is the pair of gene controlling the pair of contrasting characteristics
The best answer is C.Ribosomes are cell organelles or structures that make protein. Ribosomes are found floating in the cytoplasm or attached to the endoplasmic reticulum of the cell.The location of the ribosome will determine what kind of protein it makes. If the ribosome is attached to the endoplasmic reticulum then it will make protein for usage within the cell or outside the cell. If found freely floating in the cytoplasm, then it will make protein that will be used only within the cell and not outside.
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 such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time. Mutations can also occur as the result of exposure to environmental factors such as smoking, sunlight and radiation. Often cells can recognize any potentially mutation-causing damage and repair it before it becomes a fixed mutation.
Mutations contribute to genetic variation within species. Mutations can also be inherited, particularly if they have a positive effect. For example, the disorder sickle cell anaemia is caused by a mutation in the gene that instructs the building of a protein called hemoglobin. This causes the red blood cells to become an abnormal, rigid, sickle shape. However, in African populations, having this mutation also protects against malaria.
However, mutation can also disrupt normal gene activity and cause diseases, like cancer. Cancer is the most common human genetic disease; it is caused by mutations occurring in a number of growth-controlling genes. Sometimes faulty, cancer-causing genes can exist from birth, increasing a person’s chance of getting cancer.
