Which of the following need to be expressed to get past the G1 checkpoint and why? Select one: a. All the answers are correct and needed to progress the cell past the G1 checkpoint by expressing the enzymes necessary for DNA replication. Once these proteins are all expressed, the cell has moved past G1 into S phase. b. Primase because this enzyme is needed for DNA replication moving the cell from G1 to S. c. Cyclins because the accumulation of specific cyclins will turn on CDKs needed to turn on gene expression for proteins involved in DNA replication, moving the cell from G1 to S. d. DNA helicase because this protein is needed for DNA replication (part of S phase). So expression will help progress the cell from G1 to S.

Q: Describe the general conditions that must be met at each of the three main cell-cycle checkpoints

A: The cell cycle is monitored at the three check points, which are G1 , G2 and the third one is during…

Q: The function of the M-phase checkpoint is to check that the microtubules of the mitotic spindle have…

A: Cell division is a process of a parent cell replicating it chromosomal content and dividing itself…

Q: Which of the following is the primary method by which cyclin proteins are regulated to influence…

A: This question is based on the functioning of cell cycle and cell check points.

Q: Imagine that there are mutations in the CDK genes such that their gene products are nonfunctional.…

A: Cyclin-dependent kinases (CDKs) are the families of protein kinases first discovered for their role…

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: Q. Cyclins and CDK(inase) complexes regulate the cell cycle. Which of the following statements is…

A: CDKs do not activate Cyclins and Cyclins activate CDKs. so options C and D are false.

Q: The following figure shows how the activities (y-axis) of Cdk-Cyclin B complex and the APC complex…

A: * Mitosis is type of cell division where cell divides into two which gives genetically identical…

Q: Which of the following is typical of cancer cells?   A. The parent cell of the tumor contains a…

A: Cancer develops when the cells grow without any control and start crowding the cells which are…

Q: What is the CDK of Mitotic checkpoint? a.)Present b.)Absent

A: Cyclin and CDKs are the two types of cell regulator molecules. Cdks are enzyme kinases and it helps…

Q: Assuming that apoptosis fails and the cell continues through several cell cycles... what would the…

A: Introduction  Almost all cells in the body can divide and form new daughter cells however, there…

Q: How can defects in the regulation of cell-cyle checkpoints would affect cells and explain how these…

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: The “Hayflick limit” is the number of times cells growing in tissue culture will divide before cell…

A: Introduction  Ageing of cells can be attributed to several factors such as degradation of cellular…

Q: Survivin is an apoptosis inhibitor in humans. If the survivin gene is mutated so that it produces…

A: A morphogen is a molecule with non-uniform distribution or gradients which predict the pattern of…

Q: What would be the most likely effect of a mutation that causes cyclin B to be unable to bind to CDK?…

A: BASIC INFORMATION CELL DIVISION  It is necessary for all the cells In this the parent cell divides…

Q: If M-phase-promoting factor is injected into a Xenopus primary oocyte, which of the following…

A: Mitosis is completed

Q: Which of the following would not happen if G₁ checkpoint was mutated or damaged in a cell? a The…

A: G1 checkpoint is a checkpoint which looks for the status of the cell such as nutrients store, cell…

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: Disdis -how do RB and p53 negatively regulate the cell cycle in G1? describe the events that occur…

A: A series of events which takes place in a cell due to which it divides and forms two daughter cells…

Q: DNA polymerase III can correct replication errors through its ________ activity. a. 3’ to 5’…

A: Introduction: Although DNA replication is a highly precise process, errors such as a DNA polymerase…

Q: From the options below, select the most likely effect of a mutation that causes cyclin B to be…

A: Cell division is of two types: mitosis  meiosis

Q: the needed materials/molecules of Mitotic checkpoint?

A: CELL CYCLE:- When a cell is to divide, it is expected to synthesize its various components including…

Q: Which situation would be the most likely result of a mutation in a eukaryotic organism that causes…

A: Answer- p21 is a gene which codes for a protein that helps in regulating the cell cycle efficiently…

Q: Which statement does not describe cell cycle checkpoints? A. Normal checkpoints assess damage to…

A: To divide, a cell must accomplish many things: expand, reproduce its genetic material (DNA), and…

Q: Which of the following is the most likely effect of a mutation in the gene coding for a DNA repair…

A: Biological macromolecules are those large molecules that are necessary for the survival and growth…

Q: a) How mitogens trigger transcription of genes for entry into S phase.

A: According to our guideline we can solve upto one question, please re upload the second question…

Q: Cancer can result from a variety of different mutational events. Which of the pllowing is LEAST…

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

Q: Choose the letter of the best match from the following. A. Spindle Checkpoint B. Checkpoint to look…

A: G1= C.Time of the most cell growth(longest and first phase of the cell cycle ) S=E. Duplicate copy…

Q: Given their respective roles, why might activation of formin and myosin II be beneficial as cells…

A: When a cell is destined for division, first its nuclear content would be shared between cells. It…

Q: In cell cycle, under the control system, explain in details (including roles of related proteins):…

A: yclin-dependent kinases (CDKs) trigger the progress from G1 to S phase and from G2 to M phase by…

Q: What are cell cycle checkpoints? Why are they important

A:

Q: Which of the following repair mechanisms removes damaged bases in non-dividing cells?

A: Ans- Bae Excision Repair The common mechanism of DNA repair System is- Base Excision Repair (BER)–…

Q: ich of the following statements is TRUE? Group of answer choices a Interphase chromosomes are…

A: Over 3 billion base pairs, or nucleotides, make up the human genome. Every protein and genetic…

Q: The role of the APC to get past the metaphase/ anaphase checkpoint is... Select one: a. to initiate…

A: The APC stands for Anaphase promoting complex. It is found at the anaphase transition stage.

Q: In order for a cell to begin to replicate its DNA: a. Lamin proteins must be phosphorylated b. p53…

A: Cell division is a procedure in which a parent cell divides into two daughter cells. The cell cycles…

Q: Which of the following would occur? Select all that apply This mutant M-phase cyclin B will not be…

A:

Q: If a cell makes a mistake copying its DNA when getting ready to divide, at which checkpoint will the…

A: The cell cycle is a complicated cycle where the cell undergoes growth and replication of both the…

Q: Can cell cycle checkpoints fail? If so what are some examples of the results the can occur if they…

A: The "cell cycle", also known as "cell division", is a set of processes that occur in a cell leading…

Q: You are studying Protein X which plays a role in promoting the G1/S phase transition in eukaryotic…

A: G1/S phase transition is cell cycle stage between G1 phase and S phase.  This transition phase…

Q: Which of the following statements correctly describes p53? Which of the following statements…

A: Answers are option B and E.

Q: If chemical signals in the cytoplasm control the progression of a cell to the M phase of the cell…

A: ANSWER;- (C) condensation of chromatin in preparation of nuclear division in both cells   In G1 RNA…

Q: Human cells are highly resistant to transformation. Experiments have shown that 5 regulatory…

A: As per bartleby guidelines experts are allowed to answer only 1 question. Please post the other…

Q: Describe the three most important cell cycle checkpoints. Explain in a detailed manner and provide…

A: The process of the cell cycle involves a series of events that a cell passes from time until it…

Q: cell cycle?   A. MPF phosphorylates proteins that triggers the activation of M phase   B. MPF…

A: MPF acts as a Protein kinase that helps in the transfer of the phosphate group from ATP to the…

Q: In tumor cells Rb protein is hyperphosphorylated. In response to that, will p53 level increase or…

A: Rb protein is a very powerful tumor suppressor protein it checks the cell cycle and when it's levels…

Q: Progression through the cell cycle is dependent on both extra- and  intracellular conditions.…

A:

Q: If the S cyclin is mutated at its phosphorylation site, which checkpoint will be affected? Which…

A: Interphase and mitosis are the two major phases of cell cycle. Interphase includes G1, S, and G2…

Q: multicellular organisms, nondividing cells stay in G0 phase. For the cell, why is it better to be…

A: Cells first enter into the G0 phase from a cell cycle checkpoint then in the G1 phase, there are…

Q: Which of the following correctly matches a cell cycle checkpoint with the condition that allows…

A: Cell cycle checkpoints are the regulatory points responsible for controlling and checking cell cycle…

Viral Replication

The virus is acellular and considered non-living outside the host cell. The replication of the virus occurs only inside the living cells. Only a few genes are present in the smallest virus, whereas many genes are present in the largest virus. These genes encode specific viral proteins.