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If you're here, it's probably because you're looking for a little (or a lot!) more help with biology. I can do that!

Take a look around - I think you'll find some great stuff here...and if you're looking for more personalized help, check out the online tutoring options. Let's do some biology!

Meet Your Other Bio Professor

Hi, I'm Sarah!

I have an undergraduate degree in biology, a PhD in genetics, and several years of experience teaching college biology. As your other biology professor, I'm using what I learned as both a student and a teacher of biology to help you avoid getting lost in the details. When I'm not doing bio things, I'm probably traveling, hiking, or sewing up a new outfit.

Think we might be a match made in bio heaven?

Not sure yet? Follow me on social media for more biology lessons and study tools!

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Biology Mini-lessons

Ready to learn some bio? Check out my channel on YouTube - new videos coming soon!

I make the kinds of videos that I struggled to find for my own students. There's a lot of great content out there, but much of it feels geared towards kids or med school prep...and we really need something in between! In my videos, we review concepts, highlight common points of confusion, run through memory tips and tricks, and do a little practice to make sure everything is clear. Designed largely for the introductory undergraduate crowd, but also totally appropriate for many high school/secondary classes, and as review for more advanced courses.

Wobble [with Inosine, Codon bias, and Anticodons that don't exist!]

Wobble [with Inosine, Codon bias, and Anticodons that don't exist!]

Are you asking yourself, "how does base-pairing wobble during translation?" I got you! "Wobble" is all about how the codon-anticodon pairing rules get extra-flexible at one particular base. This allows for an anticodon to bind with multiple codons for the same amino acid, so the cell doesn't have to make as many different types of tRNAs. At the wobble site, we can have... 1. Normal base-pairing (A-U, G-C) 2. G-U pairing 3. Inosine in the anticodon pairing with A, C, or U in the codon 00:00 Intro 00:25 Codon table 01:36 Stop codons bind release factors, not anticodons! 01:59 Why don't we need 61 different types of tRNAs for 61 different codons? 03:02 Redundancy of the genetic code; synonymous codons 05:15 The wobble position 06:21 Expanded base-pairing rules at the wobble position 08:07 Inosine in the anticodon pairs with A, C, or U in the codon 09:54 Codon usage bias 11:04 Some anticodons aren't produced 14:07 Review *NOTES* You'll often see the word "degenerate" used to describe how a single amino acid can be encoded by more than one codon - same idea as "redundant" here. :) "Inosine" is actually the name of the nucleoside that contains our modified base AND a pentose sugar (like how an adenine base and a pentose sugar = the nucleoside "adenosine"). The name of the base in inosine is "hypoxanthine," but unless your class has a heavy biochemistry component, you're not likely to find this referred to as anything but inosine in the context of wobble. *Connect with me!* Website: Instagram: *References* Codon usage bias data found at:
Laptop Plant Reflection
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