Exam (elaborations)
BIOMG 3300 Unit 11 Questions with Correct Answers.
- Course
- Institution
BIOMG 3300 Unit 11 Questions with Correct Answers.
[Show more]
Content preview
BIOMG 3300 Unit 11 Questions with Correct AnswersWhy is gluconeogenesis important? Correct Answer-Some tissues
depend almost completely on glucose for energy, but the stores of
glucose are not always sufficient to last in between meals
Where does gluconeogensis mainly take place in? Correct Answer-The
liver
Name 3 noncarbodydrate precursors to glucose? Correct Answer--
Lactate
-Amino acids
-Glycerol
Which steps of glycolysis are essentially irreversible and must be
bypassed? Correct Answer--glucose --> glucose 6-phosphate
-fructose 6-phosphate --> fructose 1,6-bisphosphate
-phosphoenolpyruvate --> pyruvate
Know structures and be able to write out the first of two reactions
converting Pyruvate to PEP Correct Answer-1 Pyruvate + HCO3- +
ATP --> Oxaloacetate + ADP + Pi
What enzyme catalyzes the first bypass of gluconeogenesis? Correct
Answer-Pyruvate carboxylase
, Know structures and be able to write out the second of two reactions
converting Pyruvate to PEP Correct Answer-Oxaloacetate + GTP -->
PEP + GDP + CO2
Why is pyruvate carboxylated to oxaloacetate and then decarboxylated
to PEP? Correct Answer-Carboxylation activates pyruvate to allow it to
be decarboxylated to PEP
What cofactor is used by pyruvate carboxylase and what is its function?
What is the role of ATP? Correct Answer-Biotin, transfers an activated
CO2 group from bicarbonate to one active site to another, allowing it to
be added to pyruvate
ATP activates CO2 for addition to biotin and pyruvate
Why, in the absence of lactate, is oxaloacetate converted to malate in the
mitochondrion and then converted back to oxaloacetate in the
cytoplasm? Correct Answer-1) there is no transport protein for
oxaloacetate
2)Necessary in transport of NADH-->NAD+ out of mitochondria where
it can be re-reduced
Why, in the presence of lactate, is oxaloacetate not converted to malate
then reconverted to oxaloacetate? Why does is the lactate--> pyruvate
reaction for favorable> Correct Answer-Because oxidation of lactate to
oxaloacetate produces NADH in the cytoplasm, so there's no need to
shuttle it out of the mitochondria. saves energy
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller cracker. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
72042 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now