BIOLOGY HIGH SCHOOL

1. Explain why neither cyclins not kinases alone can cause a cell to progress along in the cell cycle. 2. How do controls on the cell cycle protect multicellular organisms from accumulating large numbers of damaged or defective cells?
3. What is the difference between cancerous tumor and metastasis?
4. What are the functions of tumor-suppressive genes and proto-oncogenes in noncancerous cells?

Answers

Answer 1
Answer: 1. Explain why neither cyclins nor kinases alone can cause a cell to progress through the cell cycle.

As cyclin accumulates, it activates their kinases that turn on the pathway to mitotic spindle formation, and so on.

2. How do controls of the cell cycle protect multi-cellular organisms from accumulating large numbers of damaged or defective cells?

The checkpoint control is responsible for multi-cellular organisms for not accumulating large numbers of damaged or defective cells. Checkpoint controls consist of proteins that detect mistakes and damage and quickly halt the cell cycle until repairs are made. When this occurs, the cell is said to be in cell-cycle arrest.

3. What is the difference between a cancerous tumor and metastasis?
Cancer is cause by mutations in the genes that encode these proteins can lead to uncontrolled growth. Cancer is when there is uncontrolled cell growth and reproduction. Metastasis is caused by tumors when they grow and interfere with the surrounding tissue or cells and break off and spread around the body. Cancerous tumors cause metastasis, and tumors are caused by mutations in genes that lead to uncontrolled growth.
4. What are the functions of tumor-suppressor genes and protoncogenes in noncancerous cells?
The genes that encode the checkpoint proteins are called tumor suppressors because they suppress the development of cells into tumors. If mutations inactivate these genes, the cell-cycle break is removed with or without a signal from the outside. Proto-oncogene’s are involved in promoting cell division, mutations can cause them to become oncogenes, or cancer genes which stimulate cells to leave G0 and divide whether or not it is a signal.

Related Questions

HIGH SCHOOL

Gestation is the event in which the ovum and sperm unite to create a fertilized egg. gestation is the event in which the ovum and sperm unite to create a fertilized egg. a. True
b. False

Answers

The answer is true. Mammals during pregnancy can have one or more gestations at the same time, the time pause of a gestation is called the gestation period. Gestation is the carrying of an embryo or fetus inside viviparous animals. It is typical for mammals, but also occurs for some non-mammals.

HIGH SCHOOL

Your first response to reduced visibility should be

Answers

The first response when seeing a reduce visibility is to be cautious, slow down and reduce speed. It is because it is important to slow down as you can't see clearly and it could cause accidents when you are not careful as you drive and your driving way is not assisted with caution.
MIDDLE SCHOOL

Most oxygen is released into the atmosphere by ____ and _____
plz help!!

Answers

I believe the answer is 1. plants and 2. bacteria

Plants and bacteria
COLLEGE

Minerals in geodes form spectacular euhedral crystals because

Answers

The main reason that minerals in geodes can form spectacular euhedral crystals is apart from the supply of the fluids containing the say silica required say for amethyst crystal formation, the crystals can grow in well-formed crystals because they have the open space to grow unimpeded in the hollow geode cavity,
Random Questions