Question

different types 1. Life begins as a single cell but turns into 2. What is melanoma? 3. What genetic mutation causes melanoma? Look at the Cell Cycle diagram below and talk about what happens ateach of the Interphase parts: INTERPHASE (DNA synthesis) Cytokinesis MITOTIC (M) PHASE 4. Summarize G1: 2. What does the G1 checkpoint insure? 5. Summarize S phase 6. Summarize G2 7. What is GO stage? 8 How do Growth Factors infuence the cell cyo 3. What are checkpoints? 10. What are cycling?

Answer 1

✓Ans 1.

Life begins when two gamets get fused (Fertilization )and produce a single diploid cell Zygote and then zygote divides to form body and to give rise many different cells.

So answer will be :--

"Life begins as a single cell but turns into body of different types."

✓Ans 2.

Melanoma :---

*A kind of cancer.

* Melaning producing skin cells become cancerous.

✓Ans 3.

Mutation :-- Sudden change in nucleotide sequence of gene which causes change in particular trait. Can be beneficial or dangerous.

-->> Melanoma caused by change in CDKN2A Gene. And this gene makes cells cancerous after getting mutation.

✓Ans 4.

G1 phase :-- largest phase of the diagram given above.

*It's period of cell for growth.

*Cell enlarges it's size.

*Cell makes various proteins and enzymes to be used.

a) Check points moniters that whether cell has proper conditions to go ahead for further stages.

G1 checkpoint monitors Cell size , nutriton, and proteins level etc.

✓Ans 5:--

S phase :--

* S=Synthetic phase

*DNA is about to replicate or going to be doubled here before going under meiosis or mitosis.