These are questions from cell molecular biology , and it requires some extensive

Question

These are questions from cell molecular biology, and it requires some extensive knowledge. I have tried finding the answers myself online and in my book, so this is the last thing I know to do. I need detailed explanations PLEASE!!!!! Someone please help!!!! Thank You!!!!

S. pombe (fission yeast) is often used for mitotic studies. Why is this species of yeast not the perfect model system? (choose the best answer)

        a.     budding is not the same as mitosis

        b.     can survive as a haploid

        c.     contains no microtubules just actin

        d.     diploid divides into haploids rather than into diploids

        e.     nuclear envelope doesn’t break down

Shmooing is most similar to what in humans?

        a.     fertilization

        b.     flattery

        c.     meiosis

        d.     mitosis

        e.     sex

Which of the following mutations are likely to be detected in cancer cells using the current strategies?

        a.     deletion in an operator sequence

        b.     driver mutation in p53

        c.     passenger mutation in actin

        d.     point mutation in a tumor suppressor

        e.     all of the above are equally likely to be detected

Explanation / Answer

1. b.     can survive as a haploid

Fission yeast governs mitosis by mechanisms that are similar to those in multicellular animals. It normally proliferates in a haploid state. When starved, cells of opposite mating types (P and M) fuse to form a diploid zygote that immediately enters meiosis to generate four haploid spores. When conditions improve, these spores germinate to produce proliferating haploid cells.

2. a.     fertilization

3. e.     all of the above are equally likely to be detected

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