Which of the following events destabilize microtubules at the kinetochore? O Preventing Ndc80 phosphorylation O Loss of tension O Loss of Aurora B activity O Microtubule depolymerization at the plus-end O Microtubule flux

Q: Mitotic spindle microtubules connect to ________ during prometaphase.   a. kinetochores   b.…

A: The cell cycle is defined as a series of events that occur in the cell as it grows and divides. The…

Q: At the end of mitosis each daughter cell has * O half the number of chromosomes as the parent cell O…

A: The cell is the basic unit of life. The tissue is a group of cells that perform a specific function.…

Q: Which of the following statements is true? O The contractile ring divides the nucleus in two. O The…

A: Cell division is the process by which a parent cell divides to form two or more daughter cells. It…

Q: Telophase in Mitosis a ) Chromosomes begin to uncoil into chromatin. b) Nucleolus and nuclear…

A: Telophase is the fifth or we can say final phase of mitosis. it is the process that separate the…

Q: The spindle attaches to chromosomes at the O a. centromere O b. contractile ring O C. centrosome O…

A: The chromosomes are thread-like structures. These contain DNA. Chromosomes are in condensed form in…

Q: What is necessary for a cell to pass the G2 checkpoint?a. cell has reached a sufficient sizeb. an…

A: Cells reproduce by a cycle of growing and dividing called a cell cycle. The cell cycle is the…

Q: Vinblastine is often used to treat cancer because it interferes with microtubules. Which of the…

A:

Q: What from mitosis is triggered by mitotic CDK inactivationmainly brought about by mitotic cyclin…

A: The cell cycle is a sequence of events by which a cell duplicates its genetic material, synthesizes…

Q: Which of the following is not regulated by lysosomal calcium signaling? Cell migration Lysosomal…

A: The main catabolic organelles in eukaryotic cells are called lysosomes. They break down both…

Q: Which cell structure is present during plant cell division but not animal cell division?   a.…

A: The final step of the cell cycle is the process of cytokinesis that involves the division of the…

Q: A couple is told by their doctor that they cannot have children because the sperm of the male lack…

A: Sperm is the male gamete help in sexual reproduction. Sperm has three part head, mid piece and tail.…

Q: The chromosomes are aligned at the spindle equator during O a. metaphase. O b. interphase. O C.…

A: Answer. A chromosome is a long thread of DNA that carries the genetic information of an organism in…

Q: All of the following pairs are well-match, except one: O Addition of Tubulin dimers occurs more…

A: Microtubules are a part of cytoskeletal elements in eukaryotes. There are two categories of…

Q: What cellular mechanism(s) ensure that passage through the cell cycle is unidirectional and…

A: Cell division is the cycle by which a parent cell isolates into at least two girl cells. Cell…

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: How many of the following are present in a long and growing microtubule (with no motor proteins)? I.…

A: GTP is defined as an energy-rich kind of nucleotide that is analogous to a molecule of ATP that is…

Q: Chromosomes that are preparing to align at the metaphase plate are repelled from the poles by the…

A: The cell division  is highly controlled mechanism;-

Q: Once formed, kinetochore microtubules depolymerize at their plus ends (the ends attached to the…

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

Q: A) Which step (A,B, or C) is necessary to allow metaphase to anaphase transition?.. Mad2 АРС/С BubR1…

A: 1) Disbanding of the linkages that keep the chromatids together is the cause of chromosome…

Q: A molecule of the motor protein Winnebago, supplied with ATP, is moving along a microtubule in the…

A: The correct option is d i.e, Winnebago will move backwards (towards point A instead of point B).…

Q: Which of the following statement(s) about cyclins is false? O Cyclins bind to cyclin dependent…

A: Cyclins concentration changes during the cell cycle. Cyclins are a family of proteins. Their…

Q: Which type(s) of microtubules undergo +-end depolymerization at anaphase? (Select all that apply!) O…

A: Microtubules are hollow tubes made of tubulin molecules the diameter of these tubes is 25 nm with 15…

Q: What type of cell is shown (in the middle)? A) plant cell in interphase O B) animal cell in…

A: The cell division is the process that involves production of new daughter cells from the mother…

Q: Identify which of the following statements regarding anaphase is INCORRECT: Kinetochore microtubules…

A: Cell division is an essential aspect of the cell, especially in germ cells. The cells divide through…

Q: form a strong inner lining of the nuclear envelope and provide anchoring sites for interphase…

A: The nuclear membrane is comprised of two phospholipid bilayers. The membrane facing the cytoplasm or…

Q: Which of the followings increase depolymerization or destabilize of microtubules? O tau protein O…

A: Microtubules are cylindrical hollow structures which are approximately 25nm in diameter, present in…

Q: At the G to S checkpoint, which factor(s) influence whether the cell will proceed from G Into S.…

A: The cell cycle is the cyclic sequence of events that a cell undergoes in order to divide. It is…

Q: Oryzalins are chemicals which can disrupt formation of spindle apparatus resulting in abnormal…

A: The cytoskeleton is a fiber network that covers a cell's interior. All eukaryotic cells have a…

Q: If the mitotic spindle does not correctly attach to chromosome kinetochores, the spindle assembly…

A: Cell cycle is the process by which cell cell grows in size and divides into daughter cells  Types of…

Q: A) Which step (A.B, or C) is necessary to allow metaphase to anaphase transition?.. Mad2 BubR1 APC/C…

A: Chromosome separation occurs at the time of anaphase and is brought about by the dissolving of the…

Q: Mitotic Anaphase Metaphase I O Mitotic prophase O Anaphase I Anaphase II Mitotic Metaphase Intephase…

A: Cell division is the process of division of cell into daughter cell. The cell division can take…

Q: is a control mechanism that ensures everything is ready for DNA synthesis O Metaphase checkpoint O…

A: Transformation of cell from one phase of cell cycle to another is controlled by some external…

Q: Which of the following organelle control intracellular digestion of macromolecules with the help of…

A: Hydrolytic enzymes catalyse the hydrolysis of peptide, ester, glycosidic, ether, carbon-carbon…

Q: The checkpoint permits cell entry into mitosis only if all DNA is replicated." O Start O APC/C O…

A: Cell cycle checkpoints function to ensure that incomplete or damaged chromosomes are not replicated…

Q: Which of the following cells are pluripotent? * O a) embryonic stem cells O b) nucleosomes c)…

A: Stem cells have the capability of cell division and they can produce different types of cells.…

Q: Which of the following occurs during cytokinesis? O continuous kinetochore microtubule shortening O…

A: The cell division causes the formation of identical daughter cells from the parent cell. The types…

Q: What function of the microtubule motor proteins dynein and kinesin is blocked by the use of…

A: Colchicine treatment to block microtubules motor proteins :-

Q: Which of the following is able to phosphorylate target proteins and facilitate progress through the…

A: The cell cycle is a phenomenon of cell reproduction in which daughter cells are formed. In the cell…

Q: The figure below shows a centrosome with microtubules attached to the kinetochore. Which of the…

A: Organelles that serve as the main microtubule-organizing centers for animal cells are known as…

Q: Which of the following will prevent progression of the cell cycle into M phase? O Completion of DNA…

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

Q: The inner membrane of mitochondria is fairly smooth. * O True O False Which of the following is a…

A: There are two type of membrane in mitochondria. The first one is outer membrane and the second one…

Q: Animal cell division is signified by the formation of cleavage furrow as oppose to plant cells, this…

A: Cell division is the process where a parent cell undergoes division to form two (mitosis) or more…

Q: Where do spindle fibers attach on a chromosome? O cell plate meristem centromere What happens to the…

A: Introduction :- Spindle fibres are a type of protein that divides a cell's genetic material. During…

Q: Which types of microtubules are essential for the major events occurring during anaphase B ? A.…

A: During anaphase chromosome separate and move toward opposite poles. Anaphase divide into two phases:…

Q: Cells move automatically through the G1, S, G2, and M phases of the cell cycle. However, movement…

A: Introduction: Cell cycle is the process of cell division which results in the formation of two…

Q: Match the process with the correct phase of the cell cycle (G1, S, G2, M).  If the process occurs in…

A: Cell cycle is a complex process with Many steps controlled by enzymes and various factors such as…

Q: Which of the following changes to the microtubule binding protein, Tau, commonly occurs in…

A: Tau is a protein that is known to be associated with the microtubules and helps in the assembly of…

Q: Which of the following is true regarding kinesin 4? O it is located on chromosomes that are not…

A: Kinesin 4 is found in the nucleus during the interphase and is bound to chromosome during mitosis.…

Q: A cell with a prominent nucleolus is most likely O Completing apoptosis O Performing crossing over…

A: The nucleolus is the most visible area in the nucleus of eukaryotic cells, and it is responsible for…

Q: . The drug cytochalasin B blocks the function of actin. Whichof the following aspects of the animal…

A: The cell cycle is the process in which the parental cells are divided into two genetically identical…

Environmental health and hazards

An organism's environment is the environment in which it lives and has an impact on its well-being. The World Health Organization (WHO) defines environmental health as "those aspects of public health, such as quality of life, that are influenced by physical, chemical, biological, social, and psychosocial components in the environment." Environmental health is concerned with both natural and man-made settings in order to enhance public health. Environmental science, occupational medicine, toxicology, and epidemiology are the key subdisciplines of environmental health.