DHN 311 Exam Tested Questions Reviewed And Revised With Correct Answers Already Passed!!
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Course
DHN 311
Institution
DHN 311
DHN 311 Exam Tested Questions
Reviewed And Revised
With Correct Answers
Already Passed!!
1. Where does the pentose phosphate pathway occur? - ANSWER
2. Where is the pentose phosphate pathway most active? - ANSWER
liver, mammary glands, adrenal cortex, and rapidly dividing t...
DHN 311 Exam Tested Questions
Reviewed And Revised
With Correct Answers
Already Passed!!
1. Where does the pentose phosphate pathway occur? - ANSWER cytosol
2. Where is the pentose phosphate pathway most active? - ANSWER
liver, mammary glands, adrenal cortex, and rapidly dividing tissue
3. What are important intermediates of the pentose phosphate pathway? -
ANSWER ribose-5 phosphate, used for nucleic acids and metabolite
that can enter glycolysis if needed
4. What are the irreversible and reversible phases of the pentose phosphate
pathway called? - ANSWER irreversible is oxidative and contains redox
reactions which generate NADPH which then goes to metabolic pathways
to form steroid hormones, fatty acids the reversible is non oxidative and
generates precursors fir glycolysis and nucleotide synthesis
5. What is glycogen? - ANSWER branched polysaccharide made entirely
of glucose; stored form of glucose that can serve as a quick supply of
glucose fr tissues
6. Glucose is require for... - ANSWER cells with no mitochondria like RBC
,7. What are the three primary sources that blood glucose can be obtained
by... - ANSWER diet, degradation of glycogen and gluconeogensis
8. Why does diet effect glycogen metabolism? - ANSWER sporadic and
inconsistent
10. How does liver glycogen effect glycogen metabolism? - ANSWER
maintains blood glucose levels w a steady supply of glycogen; 10% of a
healthy livers weight is glycogen
11. Muscle glycogen is extremely degraded in what to provide what? -
ANSWER exercising to provide muscle with an important energy source
12. Muscle glycogen tends to be depleted in less then an hour because... -
ANSWER it is there to provide a quick source of energy for either
aerobic or anaerobic metabolism
14. Muscle glycogen provides for... - ANSWER glucose to support
exercising muscle
, 15. What is the structure of glycogen? - ANSWER heavily branched
polymer of α-glucose molecule, linked at 1-4 glycosidic bonds, branched
with 1-6 glycosidic bonds
16. What is branching? - ANSWER advantageous as it increases solubility
and the exposure of more C4 non-reducing ends (glycogen can be
synthesized and degraded more quickly)
17. What id glycogenin? - ANSWER protein in the center of the connected
glucose chains that make up the glycogen granule/molecule
18. What is glycogenin's structural function? - ANSWER serves as a core
glycogen granule in the cytosol
19. What is glycogenin's enzymatic function? - ANSWER the forming a
new granule, begins linking glucose and starts process by forming a primer
20. Glycogen synthesis occurs in the... - ANSWER cytosol
21. What does glycogen synthesis require for energy? - ANSWER
triphospahtes
22. What are the 4 enzymes needed to build a glycogen molecule? - ANSWER
1- phosphoglucomutase
2 - UDP-glucose phrophosphorylase
3 - glycogen synthase
4 - glycogen branching enzyme
, 23. What is the reversible reaction catalyzed by where glucose 6-phosphate is
converted to glucose 1-phosphate - ANSWER phosphoglucomutase
24.Every UDP glucose formed requires a - ANSWER UTP
25.What does UDP use the energy source of its bond for? - ANSWER to
transfer a part of itself to the growing glycogen chain on the 4 position
What is an important source of inorganic phosphate in the cell? - ANSWER
pyrophosphatse
What could inorganic phosphates be used for? - ANSWER to make
triphosphates
Glycogen acts as a ____ to add ____ - ANSWER enzyme
around 8 glucose units to a chain which makes a primer
What makes the 1,4 linkages in glycogen only herein it can work off an existing
primer? - ANSWER glycogen synthase
How many fragments long is a glycogen fragment? - ANSWER around 8
glucose units
What serves as a primer and is needed for synthesis to begin via glycogen
synthase? - ANSWER a glycogen fragment
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