Consider an animal cell in which motor proteins in the kinetochores normally pull the chromosomes along the kinetochore microtubules during mitosis. Suppose, however, that during metaphase, this cell was treated with an inhibitor that blocks the function of the motor proteins in the kinetochore, but allows the kinetochore to remain attached to the spindle. The inhibitor has no effect on any other mitotic process, including the function of the nonkinetochore microtubules.

Answer yes or no to the following three questions concerning this animal cell that has been treated with the inhibitor:

- A. B.
Will this cell elongate during mitosis?

- A. B.
Will the sister chromatids separate from each other?

- A. B.
Will the chromosomes move to the poles of the cell?

A.
no

B.
yes

1. Yes

2. Yes

3. No

Explanation:

1. The cell will elongate during the process of mitosis as the drug inhibits the binding of the motor proteins to the kinetochore but not the process of elongation therefore yes is correct.

2. The kinetochore is the proteins which attach to the centromere position to which the microtubules attach, the kinetochore help in the movement of the chromosomes towards the opposite poles but the separation of the chromatids does not involve motor proteins and they will separate.

3. Since the chromosome movement requires the motor proteins therefore the chromosomes will not move towards the opposite poles and therefore no is correct.

picture a world where computers are building made-to-order personalized robotic arms and synthetic organs, drones are circulating above mars! due to the rapid growth of technology, the future has never been more unpredictable, and it presents a huge challenge in education: we are teaching students how to work in a future that we have never been unsure of. it is widely predicted that in eight years’ time, there will be more jobs in the fields of science, mathematics, technology and engineering than in any other discipline. and, as the technology continues to develop, it will soon become clear that addressing social problems will involve more innovative thinking, and analytical and technical knowledge than ever before. undeniably, there are no subjects that encourage innovative and creative thinking, deep thought, problem solving and independence more than the stem subjects. while it is widely commented on that there is a need to reimagine the ways stem subjects are taught in schools by embracing a more interactive and innovative approach to appeal to more students, it should come as no surprise that some of the most reputable educational organizations in the world are already implementing changes to embrace stem. harvard, for example, announced in 2014 that they were increasing their computer science faculty by over 50% and has since introduced computer science as a core subject for all freshmen. the urgency of supporting stem subjects at a young age is becoming more relevant than ever, as adopting a keen interest in the curricula needs to happen early. however, beyond the age issue is one of gender.

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