1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mestny [16]
3 years ago
7

Which of the following BEST describes the kinetochore? the array of vesicles that will form between two dividingnuclei and give

rise to the metaphase plate a structure composed of several proteins that associate with the centromere region of a chromosome and that can bind to spindle microtubules the centromere region of a metaphase chromosome at which the DNA can bind with spindle proteins the core of proteins that forms the cell plate in a dividing plant cell the ring of actin microfilaments that will cause theappearance of the cleavage furrow
Biology
1 answer:
GREYUIT [131]3 years ago
3 0

Answer:

a structure composed of several proteins that associate with the centromere region of a chromosome and that can bind to spindle microtubules

Explanation:

Kinetochores have  vvery important role in the cell division-mitosis.

During the metaphase of mitosis, spindle fibers attach to kinetochores. Some of the microtubules bind to kinetochore (kinetochore microtubules) while other don’t: they connect with the microtubules from the opposite pole, stabilizing the spindle.

During the anaphase, kinetochore microtubules pull chromosomes toward poles, helping the sister chromatids separate from each other.  

You might be interested in
What organs are being affected from dwarfism???? And how????
Alexandra [31]

Pituitary dwarfism is caused by problems arising from the pituitary gland. The pituitary gland, also called the hypophysis, is a gland at the base of the brain that produces many different hormones. This gland is divided into the anterior (front) and posterior (back) halves. The anterior pituitary produces six hormones: growth hormone, adrenocorticotropin (corticotropin), thyroid stimulating hormone (thyrotropin), prolactin, follicle stimulating hormone, and lutenizing hormone. The posterior pituitary gland only produces two hormones: antidiuretic hormone (vasopressin) and oxytocin.

The growth process begins in the lower part of the forebrain in a small organ called the hypothalamus. The hypothalamus releases hormones that regulate the production of other hormones. When the hypothalamus releases growth hormone-releasing hormone (GHRH), the anterior pituitary is stimulated to release growth hormone (GH). Growth hormone then acts on the liver and other tissues and stimulates them to secrete insulin-like growth factor-1 (IGF-1). IGF-1 directly promotes the development of bone and muscle, causing bones to grow in length, and muscles to increase protein synthesis (make more protein).

Since growth is a complex phenomenon, it may be slowed down or stopped by abnormalities arising at any point in the process. Thus, dwarfism can result if there is a deficiency in any of these hormones, if there is a failure in the receptor cells receiving the hormonal stimuli, or if the target cells are unable to respond.

At its most basic, pituitary dwarfism results from decreased production of hormones by the anterior pituitary. When none of the hormones of the anterior pituitary are adequately produced, this is called panhypopituitarism. A common form of pituitary dwarfism is due to deficiencies in the production of growth hormone (GH). When less GH than normal is produced during childhood, an individual's arms, legs, and other structures continue to develop in normal proportions, but at a decreased rate.

<span>

hopre i helped</span>
7 0
3 years ago
Every year, Earth’s lithospheric plates move between 2 cm and 5 cm. What causes these plates to move?
timurjin [86]
<span>Scientist think convection currents are what cause earths plates to move. a convetion current is caused by the diffrence in the temperature, Mantle material close to the earths core is very hot. Mantle material near the lithosphere is cooler.</span>
3 0
3 years ago
In genetics, the dash symbol (–) is a "wild card" that stands for either the dominant allele or the recessive allele; for exampl
german

Answer:

 12     :    3      :    1

white : yellow : green

Explanation:

Given that genes A and B control the fruit colour in following ways:

A_B_ or A_bb = white

aaB_ = yellow

aabb =  green

The genes undergo independent assortment so:

AaBb X AaBb =

A_B_ : A_bb : aaB_ : aabb

  9     :    3     :   3      :   1

white : white : yellow: green

        12          :    3     :   1

Hence, ratio of white : yellow : green is 12: 3: 1

8 0
3 years ago
The output region is the site of ______________________.
tester [92]

Answer:

The correct answer is option C (voltage gated Na+ channels).

Explanation:

Output region or axon terminal is the structure of neuron which transmits the signals to other nerve cells.

The signal is transferred via action potential generated by the dendrite cell which moves along the axon and reaches the synaptic junction.  

At the synaptic junction, voltage-gated channel (Na+) channels located in the membrane of the axon terminal cell opens due to the changes in the electric membrane potential which play important role in returning the depolarized cell to a resting state.

Thus, option C (voltage-gated Na+ channels) is the correct answer.

7 0
3 years ago
What materials do plants need to carry out photosynthesis
natka813 [3]
Of course the major needs of a plant is CHLOROPHYLL, because chlorophyll makes the plant green then SUNLIGHT, because the process cant work without energy. Then WATER and CARBON DIOXIDE.

Hoping this could help
3 0
3 years ago
Other questions:
  • In your own words , describe the structure of the buckyball molecule
    7·1 answer
  • How are earthquakes and volcanoes similar or related and how are they different? please help essay due tomorrow
    13·1 answer
  • Testing hypotheses often involves designing experiments. Which of the following is the factor that is observed and measured in a
    8·2 answers
  • The paths of energy transfer can be followed through food chains, food webs, and trophic levels. True False
    13·1 answer
  • When the concentration of solute and solvent are equal on both sides of the membrane.?
    9·1 answer
  • For which of the following processes can dideoxyribonucleotides be used?
    9·1 answer
  • Which of the following processes would have the quickest impact on the shape of beaches?
    8·1 answer
  • By what factor (how much) does the milli- unit differ from the centi- unit?<br> earth science
    14·1 answer
  • Soil &amp; bedrock are similar because and but
    14·1 answer
  • Which of the following correctly identifies active transport?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!