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Bess [88]
2 years ago
14

The mitotic spindle consists of two types of microtubules: kinetochore microtubules and nonkinetochore microtubules. In animal c

ells, these two types of microtubules function differently in the stages of mitosis.
Complete the sentences by dragging the labels to the appropriate locations. Labels may be used once, more than once, or not at all.

OPTIONS: Shorten, Lengthen, Disassemble
1) During prophase, the microtubules of the mitotic spindle________.

2) During anaphase, the nonkinetochore microtubules _______ and move past each other, and the kinetochore microtubules________.

3) During telophase, the nonkinetochore microtubules______.
Biology
1 answer:
Blababa [14]2 years ago
7 0

Answer:

The correct answer will be

1. Lengthen

2. Lengthen, shortens

3. Disassemble

Explanation:

There are three types of microtubules present during cell division: kinetochore, aster and polar microtubules.  

1. During prophase: all types of microtubules grow out at their positive(+) ends which functions to pull and push the sister chromatids apart towards opposite poles so they lengthen.

2. During anaphase : non-kinetochore microtubules- polar microtubules polymerization takes place at their (+) ends which causes the spindle fibres to move apart  while kinetochore microtubules which have been attached to the kinetochores of chromosomes shorten at their (+) ends and  motor proteins travel to (-) end because of which sister chromatids move towards the spindle poles.

3. During telophase: non-kinetochore microtubules depolymerize or disassembles.

Thus, 1. Lengthen, 2. Lengthen, shortens and 3. Disassemble are the correct options.

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Many human genes are known to have homologs in the mouse genome. One approach to investigating human hereditary disease is to pr
AURORKA [14]

Answer:

Part A....B

Part B....C

Explanation:

It should be understood that Mice are always first used to clinical test especially for drugs or other things that are supposed to be for human use, this is because Mice and human genetic disorders have arisen from conserved and related evolutionary processes. Therefore, when the clinical trial or test produces a positive result in the Mice, it is almost certain that the result will be the same in human.

Now in part B. When the result result is different, it might be because of the differences in anatomy and physiology might hide or change development and symptoms of disease. And that is the reason why, the result of a particular drug differs from person to person.

3 0
2 years ago
A student noticed that the freshwater plant, Elodea, produced bubbles when placed in direct light. What could the student most l
erastovalidia [21]

Explanation:

-The increased light intensity increased the rate of photosynthesis.

Photosynthesis produces glucose and O2 from inorganic CO2, light energy and water.  Since photosynthesis is rate limited, the rate of energy intake can be increased in order to speed up photosynthesis, by speeding up photolysis.

  • 6CO2 + 6H20 + (energy) → C6H12O6 + 6O2

These end products, namely O2 and glucose are then used in respiration...

  • C6H12O6 (glucose) + 6 O2 → 6 CO2 + 6 H2O + ≈38 ATP

The CO2 and H2O produced as waste in respiration can then be incorporated at the beginning of photosynthesis. Thus the reactions are cyclic- they feed into each other.

Further Explanation:

Photosynthesis is a chemical pathway that’s integral to producing energy in plants and other primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released. This occurs in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. This occurs in the thykaloids, where pigment molecules like chlorophyll reside.

Occuring in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. Water supplies the chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II.

Respiration and photorespiration both utilize oxygen for;

  • the production of ATP via the oxidization of pyruvate;
  • and the oxygenation of the molecule Ribulose 1,5-bisphosphate (RuBP), an organic molecule also used in photosynthesis, to form 3-PGA + phosphoglycolic acid,

∴ the rate of CO2 usage for photosynthesis where O2 is produced, outpaces the rate of O2 use in respiration and photorespiration.

Learn more about photosynthesis at brainly.com/question/4216541

Learn more about cellular respiration at brainly.com/question/11203046

Learn more about cellular life at brainly.com/question/11259903

#LearnWithBrainly

5 0
3 years ago
Which organisms utilize a one-way airflow through their lungs to maximize air flow efficiency and oxygen consumption?
tatyana61 [14]
You're correct because when birds hit their max altitude it's harder to breathe and to minimize the time of there flight they store immense amounts of oxygen in their lungs.
3 0
3 years ago
In the plaque assay for bacteriophages, A. only temperate phages may be used. B. the plaque is an opaque area caused by a high c
arsen [322]

Answer:

The correct answer is C. In the plaque assay for bacteriophages, the plaque is a clear zone caused by a zone of lysis.

Explanation:

The plaque assay is an approach used for titering bacteriophage stocks or determining the quantity of infectious virus in a sample. Plaques are visualized if you spot the phage on a lawn of growing compatible bacteria. Each plaque indicates an initial infection with one phage followed by lysis of neighboring bacteria in the lawn. Only viruses that cause visible damage of cells can be assayed in this way. The plaque assay is used to determine viral titer as plaque-forming units per ml so that known amounts of virus can be used to infect cells during subsequent work.

In the plaque assay for bacteriophages, the plaque is a clear zone caused by a zone of lysis.

8 0
3 years ago
10
Kaylis [27]

Answer:

H>D>G>J>A>E>I>B>F>C

H: DIAMOND

D: CORUNDUM

G: TOPAZ

J: QUARTZ

A: FELDSQUAR

E: APATITE

I: FLOURITE

B: CALCITE

F: GYPSUM

C: TALC

Explanation:

I found the full question on the test . Following is the complete answer

1. J>A>E and J>A>I

2. C is the softest. C is Talc

3. E>I ⇔ J>A>E>I

4. F>C

5. On the full question, B can scratch mineral F but it can be scratched by all the other minerals except C. B>F>C

6. H is the hardest. H is Diamond

7. D is Corundum

8. H>D>G>J

Combine all the information, we have the following:

H>D>G>J>A>E>I>B>F>C

4 0
2 years ago
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