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Jessie K.
Post-baccalaureate Research Biologist
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Biochemistry
TutorMe
Question:

What is the true function of an enzyme?

Jessie K.
Answer:

Enzymes change the rate of a reaction by lowering the activation energy. The enzyme creates a second reaction route in which a combined structure of substrate1+enzyme creates an intermediate, which has a lower activation energy and so is easier to fort. That intermediate is then transformed to a combined structure of intermediate+substrate2. Substrate1 and Substrate2 are brought together, resulting in the reaction product+enzyme as two separate entities.

Basic Chemistry
TutorMe
Question:

Why are noble gases inactive in their normal form?

Jessie K.
Answer:

Noble gases are non-reactive alone because they have completed outer electron shells, filled with eight electrons.

Biology
TutorMe
Question:

How do you determine the which strand of DNA is the antisense strand during DNA transcription?

Jessie K.
Answer:

The direction of the promoter determines which strand is the antisense strand, rather than the sense strand. On the antisense strand, the promoter is read 5' to 3' by RNA polymerase; therefore, the DNA is complementarily transcribed into mRNA in the 3' to 5' direction on the sense strand.

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