Answer:
b. Mutations that inactivate tumor suppressor genes are important in cancer.
Explanation:
Most cancers have inactivating mutations in one or more proteins that normally,Cancer can result from expression of mutant forms of these proteins: growth factors and mutation in only one of the two alleles is sufficient for induction of cancer, the cells from tumors caused by these viruses is near the c-myc gene.
Answer:
In the given case, it can be concluded that very less amount of telomerase is being produced.
Explanation:
Terminal transferase or telomerase refers to a ribonucleoprotein that supplements a telomere repeat sequence to the 3 prime terminals of telomeres. A telomere is present at each terminal of the chromosomes found in the majority of eukaryotes. It helps in safeguarding the terminals of the chromosomes from destruction or from getting combined with the adjacent chromosomes.
Telomerase has its own RNA molecule and works as a reverse transcriptase enzyme. Generally, telomerase is found active in gametes, in stem cells, and in the majority of cancer cells, however, it is generally present in low concentration or is absent in the majority of somatic cells. Thus, the decrease in the ends of the chromosomes suggests that the production of telomerase is taking place at low levels.
First, we want to know the average length of each cell. If you have 100 cells in a 1 millimeter space, we would do 1 ÷ 100. 1 ÷ 100 = 0.01 millimeters. Hope this helped!
<h2>Phylum Annelida</h2>
Explanation:
The given animal must be an Annelid.
Annelids are commonly called segmented worms. The characteristics features of annelid are:
- Segmented bodies , each segment is called annuli.
- Closed circulatory system.
- Stiff appendages and flexible skin.
- Eucoelomate i.e the presence of true coelom.
- Nephridia as excretory organs.
Since the animal discovered by the marine biologist has a segmented body and true coelom, it is obviously categorized in Phylum Annelida.
