Answer:
C
Explanation:
The damage to DNA usually occurs where there are two consecutive thymine nucleotides on a DNA strand. The energy from the UV light causes the two dimers to form a cyclobutane pyrimidine structure. Proofreading and repair mechanism of DNA find it difficult to repair this kind of damage on DNA. During replication, therefore, DNA polymerase is unable to replicate this region hence leading to a mutation on the replicated strand at this local point.
The rate of a enzyme activity is greatly influenced by the structure of the enzyme or In other words a change in the structure of an enzyme affects its rate of activity. When ph of a particular medium changes it leads to an alteration in the shape of the enzyme.
Answer:
A parasitic relationship is one in which one organism, the parasite, live off of another organism, the host, harming it.
Answer:
For question 1 the answer is respiratory, and for question 2 is circulatory
