Answer:
Inappropriate activation of telomerase can result in cellular immortality, one of the cellular changes implicated in the development of cancer.
Explanation:
Some studies show that when telomerase activity is stimulated and a tumor suppressor gene (the p16INK4a gene) is inactivated, cellular immortalization occurs, which constitutes an important step towards the formation of a tumor.
Answer:
DNA replication is a process where the DNA is copied and replicates to produce the 2 identical copies of the molecule. Strands of DNA molecule work as a template for the production of complementary strands. The DNA splits synthesizing a fork. A new DNA is always synthesized in a 5' prime to 3' prime manner. Replication of both the DNA strands goes in two different ways.
1) Leading strands: It is a strand which is goes to the direction same as the replication fork movement and synthesized in 5'-3' prime direction. This strand formation is occurred as nucleotides are continuously added to the 3' prime end after polymerase reads the DNA template (original).
2) Lagging strands: It is a strand which is goes to the opposite direction as the replication fork movement and synthesized in 3'-5' prime direction. It is synthesized in fragments which are known as okazaki fragments. Lagging strand synthesis needs RNA primase.
i think the answer can be a or c
Sand dunes are formed from wind movement. There needs to be a large amount of loose sand in an area with hardly any vegetation, enough wind to move grains of sand and some kind of obstacle to make the blowing sand lose its momentum and settle in a new place.
