Which of the following statements describing kinetochores is correct? They are sites at which microtubules attach to chromosomes. explanation: As the spindle depolymerizes, the kinetochores appear to move along the spindle fiber, dragging the attached chromosomes with them.

Which of the following best describes a kinetochore?

which of the following best describes the kinetochore? a structure composed of several proteins that associate with the centromere region of a chromosome and can bind to (.. spindle microfilaments?) What would you expect to happen if you fuse a cell in S with a cell in G1?

What is a kinetochore quizlet?

A kinetochore is where the spindle fibers attach to the chromosome. ... the nuclear envelope disappears, microtubules invade the nuclear area, chromosomes are more condensed, each chromatid has kinetochore for microtubules attach to.

What is the function of kinetochores quizlet?

Kinetochores form the attachment between the sister chromatids and the dynamically growing and shrinking microtubules of the mitotic spindle. The kinetochores are also able to sense the tension formed when the two attached sister chromatids are properly attached to each pole of the bipolar spindle.

Where do kinetochores attach?

Kinetochore Domain

At metaphase, the kinetochore, a proteinaceous multidomain structure, is assembled on the outer surface of the centromere, promoting attachment of the chromosome to spindle microtubules and movement during anaphase.

Which of the following statements are correct about the kinetics of this reaction ?

28 related questions found

What is the role of kinetochore?

In eukaryotes, the kinetochore is a proteinaceous multi-subunit assembly whose main function is to generate load-bearing attachments of sister chromatids (the replicated chromosomes held together by the protein complex cohesin) to spindle microtubules during cell division (mitosis or meiosis) (Figure 1A).

What does kinetochore mean?

Definition. The kinetochore is a protein complex assembled on the centromeric region of DNA. It provides the major attachement point for the spindle microtubules during mitotic or meiotic division to pull the chromosomes apart.

What is the correct function of the non kinetochore microtubules?

An explanation of these data is provided which suggests that the role of non-kinetochore microtubules is to trap energy in the developing spindle, such that it can be used to separate spindle poles during anaphase B.

What is a kinetochore read your text carefully?

What is a kinetochore? Read your text carefully, and then make a labeled sketch that shows a replicated chromosome. Each of the two sister chromatids of a duplicated chromosome has a kinetochore, a structure of proteins associated with specific sections of chromosomal DNA at each centromere.

What is the function of the kinetochore microtubules in mitosis?

Microtubules that bind a chromosome are called kinetochore microtubules. Kinetochore fibers extend from the kinetochore region and attach chromosomes to microtubule spindle polar fibers. These fibers work together to separate chromosomes during cell division.

Where do Kinetochores form of chromosomes quizlet?

The kinetochore is located at the centromere (the constricted region of the condensed chromosome). Kinetochores contain many protein complexes to link the centromeric DNA eventually to microtubules.

What's the difference between kinetochore and centromere?

The key difference between centromere and kinetochore is that centromere is the region of the chromosome that holds two sister chromatids together after the replication of chromosome while kinetochore is the disc-shaped protein complex of the chromosome that allows spindle fibers to attach during the cell division.

What will proceed only after all kinetochores are attached to spindle microtubules quizlet?

The kinetochores must all be attached to spindle fibers during metaphase. This will activate an enzyme (separase), which allows the sister chromatids to separate and anaphase will proceed.

Which of the following statements best explains this observation a cell in prophase?

Which of the following statements best explains this observation? A cell in prophase of mitosis is successfully fused to a cell in G2 of interphase, and then after fusion both nuclei are seen to have fully condensed chromosomes and to proceed on through mitosis.

Which of the following best describes the role of the spindle fibers?

Which of the following best describes the role of the spindle fibers? The sister chromosomes are pulled apart by the shortening of the spindle fibers. The spindle fibers ensure that sister chromatids will separate and go to different daughter cells when the cell divides.

Which of the following does not occur during mitosis?

Explanation : Replication of DNA does not occur in mitosis. Replication of DNA occurs during S phase, an entirely different phase of cell division.

What is a correct statement about the cell cycle?

The series of events that occurs from when a cell forms until it divides into two daughter cells is called the cell cycle. Every cell cycle includes four main events: 1) reception of a signal to divide, 2) DNA replication, 3) segregation of the replicated DNA, and 4) division of the cytoplasm.

Which of the following is the correct sequence of mitosis?

The correct order of mitotic phases is (C): Prophase - metaphase - anaphase - telophase.

Which of the following represents the correct order of the phases of mitosis?

Which of the following represents the correct order of the phases of mitosis? Answer: Prophase > Metaphase > Anaphase > Telophase.

What is the difference in function between kinetochore microtubules and non kinetochore microtubules?

The key difference between kinetochore and nonkinetochore microtubules is that kinetochore microtubules are directly attached to kinetochore of chromosomes and move them towards the poles during mitosis while nonkinetochore microtubules do not connect with the kinetochore of chromosomes.

What is non kinetochore microtubules?

That aspect of the mitotic spindle that does not interact with chromosomes. Nonkinetochore microtubules are charged instead with lengthening cells as they press against each other rather than interaction with kinetochores associated with chromosomes.

What would happen if there were no kinetochores?

What would be the result if a chromosome did not have a kinetochore? resulting cells would be missing a chromosome. ... Genes encoding different characteristics separate and assort independently of one another when they do not locate close together on the same chromosome.

What is kinetochore short answer?

A kinetochore (/kɪˈnɛtəkɔːr/, /-ˈniːtəkɔːr/) is a disc-shaped protein structure associated with duplicated chromatids in eukaryotic cells where the spindle fibers attach during cell division to pull sister chromatids apart.

How do microtubules find kinetochore?

1) Kinetochores are initially captured by the lateral surface of single microtubules that extend from one of the spindle poles [6–8]. ... 5) Once all kinetochores bi-orient on the spindle, cohesion between sister chromatids is removed, causing sister chromatid segregation to opposite spindle poles during anaphase A [11].