A mutated gene that codes for an altered version of Cdk that is active in the absence of cyclin is a(n) _____. a. kinase inhibitor. b. tumor suppressor gene. c. proto-oncogene. d. oncogene.

Q: A research study indicated that an agent in cigarette smokecaused the silencing of a…

A: Covalent histone modification can lead to epigenetic changes. It is the covalent modification of a…

Q: Oncogenes show a of mutation, while tumor suppressor genes show a of mutations. is the process by…

A: Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread…

Q: Proto-oncogene product causes:   A. stimulation of cell cycle.   B. inhibits cell cycle.   C.…

A: Answer--

Q: The p53 gene was discovered in 1979, but it was not clear whether the gene functioned as an oncogene…

A: An oncogene is a type of gene that is responsible for causing the cells to divide uncontrollably and…

Q: ___________ are changes to the order of nucleotides in a segment of DNA that codes for a protein. a.…

A: Nucleotide is the basic building block of nucleic acids. RNA and DNA are long chains of nucleotides.…

Q: Cell differentiation always involves(A) transcription of the myoD gene.(B) the movement of cells.(C)…

A: The cell is the basic structural, functional, and biological unit of all known organisms. A cell is…

Q: These genes are involved in normal cell growth and division, but if mutated, could become more…

A: Oncogenes are tumour-causing genes. They are mutated and abnormal that leading to uncontrolled cell…

Q: A tumor suppressor genea. inhibits cell division.b. opposes oncogenes.c. prevents cancer.d. is…

A: Tumor suppressor genes can act as gatekeepers or caretakers. Those which promote cell death are…

Q: one question with multiple parts! 1A) If you were a cancer biologist interested in developing new…

A: Introduction Metastasis Is The Spread Of A Pathogenic Agent From An Initial Or Main Site Inside The…

Q: A cell is cancerous. You might find an abnormality ina. a proto-oncogene.b. a tumor suppressor…

A: Cancer is an uncontrol growth of a cell .cancer was developed when this is an abnormal growth of a…

Q: Which of these is a characteristic of cancer cells? a. They do not exhibit contact inhibition. b.…

A: Cancer cells are specialized cells that possess the ability of uncontrolled division, leading up to…

Q: 47. hTERT is repressed in these cells: A. Germ cells B. Tumor cells C. Somatic cells D. A and B

A: hTERT is represses in the cells.

Q: If a is inactive, a cell may become cancerous. Ca. proto-oncogene b. tumor suppressor gene Cc.…

A: Cancer is the group of diseases. It involves the uncontrolled division of normal cells in the body.…

Q: Which of the following mutations is MOST likely to cause cancer? A) a mutation that causes a cyclin…

A: Introduction- Cancer is a caused by the disturbances in the  controls which regulate cells and this…

Q: Cancer causing genes are called ________. a. transformation genes b. tumor suppressor genes c.…

A: Cancer is a fast growing chronic disorder nowadays. It is caused due to lack of or absence of…

Q: P53 is a tumor suppressors protein.   The protein is present in the cell at all times but is…

A: Answer) E It would spread to all parts of the body. p53 gene act as a tumor suppressor gene and get…

Q: Part A and B A. What is the normal function of the Rb protein? A) Rb prevents the cell cycle from…

A: Answer A) Rb is Retinoblastoma protein which is a tumor suppressor protein and belongs to pocket…

Q: Tumor Suppressor Genes are often called as gatekeepers because: a. They signify their involvement…

A: The correct option is a i.e.They signify their involvement in governing the dynamics of cell…

Q: The term differentiation refers to (a) the loss of genes from cells. (b) the acquisition of new…

A: Developmental biology is the branch of biology in which the development of the organisms from the…

Q: Mutations to proto-oncogenes act toa. increase cell division. c. repress oncogenes.b. increase DNA…

A: Cancer-critical genes are categorized into classes; Proto-oncogenes and Tumor-suppressor genes. The…

Q: ________ are changes to the nucleotides in a segment of DNA that codes for a protein.a.…

A: DNA( deoxyribonucleic acid) is the double-stranded molecule that is the genetic material in most…

Q: Define about Some Proto-oncogenes and Tumor-suppressor Genes ?

A: Introduction: Proto-oncogenes and tumor suppressor genes belong to cancer critical genes whose…

Q: What would be the likely result of a mutation of the bcl-2 gene on the level of apoptosis? a. No…

A: Answer: Introduction: Bcl-2 (B-cell lymphoma 2), occurred in humans produced by the BCL2 gene, this…

Q: Why would the failure of the p53 tumor supressor gene be more likely to cause cancer in a seventy…

A: Tumor protein p53, which plays a crucial role in the cellular response to DNA damage, is one of the…

Q: Normal (nonmutant) tumor-suppressor genes often functiona. as negative regulators of cell…

A: Cancer is defined as the biological disorder in which the cells undergo uncontrolled growth and cell…

Q: Most inherited forms of cancer involve _______________ and these individuals are for the mutation.…

A: Firstly we can examine what each of the terms given represents. 1. Tumor suppressor gene: It is a…

Q: The term cellular differentiation refers to (a) the loss of genes from cells. (b) the acquisition of…

A: Introduction  Life starts from a single celled-stage termed as Zygote which develop from the fusion…

Q: we read that in tumor cells Rb protein is hyperphosphorylated. In response to that, will p53 level…

A: Phosphorylation leads to interdomain locking, which alters the structure of pRb and inhibits it from…

Q: What is differentiation? A. When a cell switches from its original purpose B. The process of…

A: Hi, Thanks For Your Question.  Answer : Correct Option Is C (The process by which cells become…

Q: Why is it easier to manipulate embryonic stem cells to differentiate into various tissues than it is…

A: Embryonic stem cells are pluripotent  stem cells, meaning they can divide into more stem cells or…

Q: Cancer cells are easier to maintain in culture than normal cells because a) they divide without the…

A: Cancer cells are mutated cells that are cultured in laboratories for studying various human…

Q: The cloning experiments carried out on frogs demonstrated that (a) all differentiated frog cells are…

A: Cloning is an established methods in which various types of materials are used to produce several…

Q: Define the following terms: a. cell transformation b. oncogene c. apoptosis d. early response gene…

A: Gene regulation is the mechanism that acts to induce or repress the expression of the gene.that…

Q: Which of the following statements about cancer is false? (a) oncogenes arise from mutations in…

A: Proto Oncogenes are the genes that cause cancer when there are alterations in them. Several factors…

Q: Cells in a tumor contain mutated copies of a particular gene that promotes tumor growth. Gene…

A: An oncogene helps in control cell division and  contributes to cancer progression whereas a tumor…

Q: is a normal cellular gene that through a A an oncogene. OA) proto-oncogene...loss-of-function OB)…

A: An oncogene is a cancer-causing gene that has been mutated. A proto-oncogene is a type of oncogene…

Q: mutation in p53 promoter that prevents p53 from being expresses Causes? Why? A. Increased…

A: Cancer is a condition in the body where cells in particular tissues lose the function of apoptosis…

Q: Stargardt's disease was one of these that can be treated using embryonic stem cells.  Why would…

A: Stem cells are known as the raw materials of the body from which other cells with specialized…

Q: Tumor-suppressor genes promote cancer whena. they are overexpressed.b. they are expressed in the…

A: Cancer is a disorder in which abnormal cells divide irrepressibly and destroy the tissues of the…

Q: Sometimes, malignant cells do not stay properly anchored in tissues because of the loss of function…

A: Malignancy It refers to the presence of cancerous cells that have the ability to spread to other…

Q: P53 is a tumor suppressor protein.   The protein is present in the cell at all times but is…

A: Given information: P53 is a tumor suppressor protein.   The protein is present in the cell at all…

Q: What is apoptosis? a. A chemical that damages neurons b. A chemical that keeps neurons alive c. A…

A: Neurons are a type of cell present in the nervous system. Nervous system helps in maintaining the…

Q: With regard to cancer cells, which of the following statementsare true?A. Cancer cells are clonal,…

A: Cancer is a group of diseases involving abnormal growth of cells, which tend to proliferate in an…

Q: Some cancers have been treated with drugs that demethylate DNA.Explain how these drugs might work.…

A: Cancer is a disease that is associated with genetic changes. The mutations in the oncogenes and…

Q: Imagine you have used cBioportal and breast cancer patient datasets and identified a…

A: Introduction :- Cancer is defined as the uncontrolled and un-regulated proliferation of cells , due…

Q: A gene that codes for a positive cell-cycle regulator is called a(n) _____. a. kinase inhibitor. b.…

A: The cell cycle is responsible for the continuity of life from one cell to the next since it…

Oogenesis

The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase. 

Cell Division

Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons: