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Tutor profile: Laela B.

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Laela B.
Mad Scientist Tutoring - Biology / Chemistry / Genetics
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Questions

Subject: Organic Chemistry

TutorMe
Question:

What is an electrophile?

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Laela B.
Answer:

Electrophiles are attracted to electrons and can be an ion, or a constituent on an organic molecule that is either neutral, or positively charged.

Subject: Biology

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Question:

What is the difference between gram positive and gram negative bacteria?

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Laela B.
Answer:

Gram negative bacteria contain an outer membrane, but thin peptidoglycan layer in which only the counter-stain in retained, leaving a pink color from the safrannin. Gram positive bacteria do not have an outer membrane, but contain a thick layer of peptidoglycan that retains the primary stain, crystal violet, that appears purple.

Subject: Biology

TutorMe
Question:

Describe three essential components in animal cells, including their function.

Inactive
Laela B.
Answer:

1. Lysosomes: digestive vesicles found within the cytoplasm that dispose of unwanted particulates 2. Mitochondria: the power house of the cell because it provides ample ATP through oxidative phosphorylation 3. Plasma membrane: phospholipid bilayer that creates a semi-permeable barrier between cytoplasm and outside environment; contains integral membrane proteins that allow transport of ions and other molecules in and out of the cell

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