The role of the APC to get past the metaphase/ anaphase checkpoint is... Select one: a. to initiate gene expression of proteins involved in DNA replication. b. Add phosphates to the MPF to cause intermediate filaments to break down, free DNA to move in the cell. c. to add phosphate to intermediate filaments causing them to reform into the nuclear envelope d. add ubiquitin to cohesins allowing the sister chromatids to split

Q: Often mutations in cyclin dependent kinases, CDKs, can cause cancer. This is because a. CDKs…

A: Cyclins are one which drives the cell cycle events by working with enzymes called Cyclin-dependent…

Q: Describe the function of these molecules that help control the cell cycle A.) M-phase promoting…

A: A) Maturation promoting factor is a cell cycle gatekeeper that controls a cell's transition from the…

Q: rms of the cell cycle, what would happen if there was a defect in the Rb prote made it unable to…

A: Rb protein is a tumor suppressor protein that is it suppresses the tumor from growing. Hence Rb…

Q: Chromosomes are visible under microscope during cell division because a. Thickening of chromatins b.…

A: Correct option is a.Thickening of chromatins    The nucleoli vanish, and the chromatin fibres…

Q: In the eukaryotic nucleus during interphase, a strand of chromatin consisting of eight conserved…

A: Interphase is the part of the cell cycle that is not followed by significant changes under the…

Q: During mitosis: a. homologous chromosomes are pulled in opposite directions b. sister chromatids of…

A: Mitosis is the process of cell division  in which one cell gives rise to the two genetically…

Q: Cell growth and division occurin a regular cycle. This cycle is divided into fourphases: G1, S, G2,…

A: Cell cycle  It is a series of events that occur during the division of a cell.

Q: Cell cycle regulation is important to ensure that a. non-dividing cells enter the G0 stage. b.…

A: Growth and reproduction are the two important characteristics of all living forms. Life of all…

Q: The functions of centrioles include ...... a.serving as the site for ribosomal RNA synthesis…

A: Centrosome are specialised structures of animal cells, lower plants and primitive flagellates only.…

Q: The role of p53 in normal cells is toa. create cancer-blocking mutations.b. trigger unrestrained…

A: Answer- P53 is the tumor supressing gene that is prensent in every cell. Any mutation in this leads…

Q: Spindle microtubules 24.

A: Introduction Metaphase is characterized as where all of the chromosome sets are completely…

Q: The p53 gene encodes a tumor-suppressor protein, p53, which acts as a transcription factor for…

A: Answer. Genes for which a gain of function mutation drives a cell towards cancer are called proto…

Q: Dr. William's lab is studying cell division on a mutant primary mouse cell line. Interestingly the…

A: Cell division is the production of new daughter cells from the mother cell. There are usually two…

Q: Which of the following occurs during the G2 stage of interphase? a.The cell undergoes mitosis.…

A: Cell cycle is the organized sequence of events which takes place in a cell for preparation of cell…

Q: f the anaphase promoting complex (APC) is temperature sensitive (active at 30C, but inactive at…

A: Anaphase-promoting complex is an E3 ubiquitin ligase that marks target cell cycle proteins for…

Q: Two cells from an animal’s heart are removed and studied. One cell has twice the amount of DNA as…

A: The s phase or the synthesis phase of the ell cycle is the part of the interphase where important…

Q: The metaphase to anaphase transition involves a. new force being generated to pull the chromatids…

A: Answer- Every cell undergoes division which have various steps. There are two types of cell division…

Q: (46) A mutated form of protein pox is found in patients with squamous cell carcinoma. In vitro…

A: Cancer is a complex and multifaceted illness that emerges from the disturbance of ordinary cellular…

Q: Which of the following statements is true regarding cell cycle regulators? a. Cyclins determine…

A: Cell cycle doesn't occur in unchecked manner. Cell preperation is usually checked by regulatory…

Q: "Agent V" is the name of an anticancer (chemotherapy) drug. This drug works against cancer cells by…

A: A cell grows and progresses through the cell cycle t divide into corresponding daughter cells. The…

Q: Crossing over occurs during which what of the following? a.)Anaphase 1 b.)Metaphase 2 c.)Prophase…

A: The cell cycle is a sequential order of events that occur in a cell. The biological cell grows and…

Q: Eukaryotic cells coordinate dna replication with cell cycle so that the genome is copied once per…

A: Introduction :- Eukaryotic cells have a complex and highly regulated DNA replication process that is…

Q: 28. When studying living cells in a laboratory, researchers sometimes use drugs as a way to make…

A: Ans 28: - Whenever cell cycle is stopped, the cell becomes dormant and returns to the resting stage…

Q: Somatic stem cells are best described as ...

A: Since  the cells are somatic they would not divide through out life. They are not at dysregulated.…

Q: Crossing over occurs during prophase prophase I metaphase I prophase II (a) (b) (c) (d)

A: Cell division is the process by which cell divides into daughter cells . It can be meosis and…

Q: The mitotic spindle is often described as a microtubule based cellular machine. The microtubules…

A: The cytoskeleton is made up primarily of microtubules. They are present in all eukaryotic cells and…

Q: Which one of the following represents interphase?    A.  G1 + G2 + S  B.  S + M + C  C.  prophase…

A: Interphase :- Interphase is also refers to as resting phase of the  cell where cell gather material…

Q: 25. Crossing over involves each of the following with the EXCEPTION of O A. Transfer of DNA segments…

A: Crossing over is defined as the exchange of genetic material between two homologous chromosomes. It…

Q: During which part of the cell cycle does DNA replication occur and why is it important? Select one:…

A: A cell cycle consists of a series of events which is required for growth and division of cells. A…

Q: Metaphase: As a result of the back-and-forth movement of the spindle fibers that has been occurring…

A: The metaphase plate is shown by an imaginary line drawn across the cell as a diameter (a line…

Q: Which of the following would be expressed at varying levels during different parts of the cell…

A: Cyclins Cyclins are groups of protein that work together to regulate  different phases of the cell…

Q: Which of the following statements concerning p53 is NOT correct? O a. O b. O C. p53-dependent…

A: p53 is a gene that helps to control the cell cycle and prevent cells from becoming cancerous. It…

Q: If there is inhibition to the DNA synthesis, what specific cell cycle will be affected? Will the…

A: DNA replication is important because without it the new cells that are produced during mitosis or…

Q: Which of the following proteins would least likely promote arrest of cell division or apoptosis?…

A: Apoptosis:  A sort of planned cell death known as apoptosis, or "falling off," can place in…

Q: Which of the following statements is true about NHEJ (Non-Homologous End Joining) repair? a. This is…

A: Non-homologous end joining(NHEJ) is basically a repair pathway.It mainly repairs double-strand…

Q: The p53 protein regulates the expression of BAX and Bcl2 to keep division at normal rate. Explain…

A: The p53 gene codes for p53 protein which regulates the expression of BAX and Bcl2 to keep cell…

Q: Homologous pairs of chromosomes are undergoing crossing over, but they have not yet lined up in the…

A: Homologous chromosomes exchange their non-sister chromatids during crossing over. In the cell cycle,…

Q: The p53 pathway is important for regulating the cell cycle. In a normal cell, there is a protein…

A: p53 is the most extensively researched tumor suppressor gene. It plays a significant role in the…

Q: a) In hereditary retinoblastoma tumors, Rb is mutated. Among the following mutations, which one is…

A: The tumor suppressor protein Rb (Retinoblastoma protein) plays a crucial role in regulating the cell…

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: