Two ways RNA avoids being destroyed by RNases?

1 answer:

3 0

One way that intracellular RNA is protected from degradation by RNase is through 5’ capping and poly-A adenylation on the 3’ end. This increases the half-life of the RNA and allows it to mediate its function before it is degraded. The other way is the protection by ribonucleoproteins and ribonuclease inhibitors.

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Plant cells undergo a process called photosynthesis, which uses sunlight to make sugar. Which need does photosynthesis fulfill f

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the need for growth

Explanation:

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What problem would most likely to occur if a haploid cell attempted to perform meiosis? the cell could not replicate its dna pri

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The answer is; the cell could not pair homologous chromosomes during meiosis.

For meiosis to occur, the sister chromosomes pairs line up in the metaphase-plate so that each chromosome of the pair is pulled to the opposite pole by the spindle in anaphase. Therefore, meiosis can only occur in cells with normal ploidy so the ploidy halved by meiosis.

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Fruit flies have a diploid number of 8, and honeybees have a diploid number of 32. In which case will crossing over have greater

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The correct option is A.

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As we know that genetic variation that result from crossing over depend on the number of genes and their alleles. When there are more genes in genome the chances of polymorphic loci will increase, which will result into more genetic variation during crossing over.

Forexample:

Drosophila melanogaster is a common fruit fly having diploid number of 8 chromosome composed of 122,653,977 base pairs, and about ~17,000 genes. Honey bees have diploid number of 32 chromosomes composed of approximately 2360000 base pairs, and 10,000 genes.

Conclusion:

As fruit fly genome contain more genes and polymorphic loci, so genetic variation is more likely to be greater in fruit fly.

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Dr. Siddiqui asks you what you think is wrong with Angela. What is your diagnosis? (Note: do not simplysay hyper- or hypothyroidism; that portion of the question was already answered above. Explain in detailwhy/how you came up with the diagnosis. Include the evidence that led you to this diagnosis.

Judging from Angela’s results, she has Serum thyroxine, Thyrotropin, and SerumTriiodothyronine hormones to be missing. This will cause Hypothyroidism results due to failure of the thyroid gland to produce sufficient hormones.

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Technically, a goiter can develop in a gland that is developing high level of hormone (hyperthyroidism), and low level of hormone (hypothyroidism), or the certain amount of hormone (euthyroidism) needed.

In Angela’s situation, her TSH concentration and thyroid hormones are at a reduced level. This will cause, the pituitary gland in the brain to produce a signal to the thyroid. Thus, her condition should be well observed all through the period till her conditions return to the way it ought to be normally.

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