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Tutor profile: Steven R.

Inactive
Steven R.
Pharmaceutical Science PhD and Research Scientist. Specializing in chemistry, biology, and math subjects
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Questions

Subject: Chemistry

TutorMe
Question:

Describe pH and how it is measured.

Inactive
Steven R.
Answer:

pH is a logrithmic scale of the concentration of free H+ ions within a solution. The larger the concentration of H+ ions, the more basic the solution. The pH of a solution is typically measured using ion-sensitive probes which measure potential of the solution. These probes are calibrated through titration of a known concentration of a strong base or acid and measuring the potential.

Subject: Biology

TutorMe
Question:

Describe the difference between Prokaryotic and Eukaryotic DNA.

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Steven R.
Answer:

Prokaryotic cells contain a single chromosome with circular DNA. This DNA consists of one copy of the genome and a single replication site. Eukaryotic cells contain their DNA mainly in the nucleus. Eukaryotic cells have multiple chromosomes containing multiple copies of their genome. Eukaryotic DNA also contains multiple replication sites and introns, which prokaryotic DNA does not have. Finally, eukaryotic chromosomes are compacted with histones while prokaryotic chromosomes are not.

Subject: Calculus

TutorMe
Question:

Evaluate the indefinite integral: $$\int$$ 6X^5 + 3X^4 - 5dX

Inactive
Steven R.
Answer:

X^6 +(3/5)X^5 - (5/2)X^2 + C

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