A level biology MCQ
Glycogen is a large polysaccharide.
Which option describes the structure and function of glycogen?
A 1–6 glycosidic bonds are more accessible to enzymes than 1–4 glycosidic bonds so energy
can be released more quickly.
B Bonds between β-glucose residues are easily broken by enzymes.
C Exposed OH groups mean glycogen is soluble.
D Short branches allow more energy storage in a small space.
Does anyone know why the answer is D not A?
Which option describes the structure and function of glycogen?
A 1–6 glycosidic bonds are more accessible to enzymes than 1–4 glycosidic bonds so energy
can be released more quickly.
B Bonds between β-glucose residues are easily broken by enzymes.
C Exposed OH groups mean glycogen is soluble.
D Short branches allow more energy storage in a small space.
Does anyone know why the answer is D not A?
Reply 1
Original post
by khkh890laalalGlycogen is a large polysaccharide.
Which option describes the structure and function of glycogen?
A 1–6 glycosidic bonds are more accessible to enzymes than 1–4 glycosidic bonds so energy
can be released more quickly.
B Bonds between β-glucose residues are easily broken by enzymes.
C Exposed OH groups mean glycogen is soluble.
D Short branches allow more energy storage in a small space.
Does anyone know why the answer is D not A?
Which option describes the structure and function of glycogen?
A 1–6 glycosidic bonds are more accessible to enzymes than 1–4 glycosidic bonds so energy
can be released more quickly.
B Bonds between β-glucose residues are easily broken by enzymes.
C Exposed OH groups mean glycogen is soluble.
D Short branches allow more energy storage in a small space.
Does anyone know why the answer is D not A?
OPTION A:
That's not the case. Alpha-1,6 glycosidic bonds are indeed involved in branching, to be certain, but glycogen phosphorylase, the primary enzyme that degrades glycogen, acts on the alpha-1,4 glycosidic bonds on the chain ends. You require a different enzyme to break the alpha-1,6 bonds. The actual reason you receive energy so quickly is due to the branching, which provides numerous sites for the enzyme to act upon, and not because 1-6 bonds are simpler to break.
OPTION D
Glycogen has short branches that have a lot of energy in a small area.
That's right! The branched structure isn't random—it keeps glycogen very condensed. Cells can store it with glucose, which they utilise for energy, without creating water balance issues. Plus, the branches serve as quick access points for enzymes. When your body all of a sudden requires more energy? Glycogen is broken down rapidly since there are numerous locations for it to start from.
So why should we care? The following are two reasons why it matters:
- Space saver: It's like being able to put a week's worth of groceries in a tiny fridge—cells can store a lot more glucose this way.
- Fast energy: More branches enable enzymes to function more quickly, supplying you with fast energy when you most need it (such as during a run or while cramming for an exam).
In brief, option D is true; glycogen's branching is nature's method of storing energy cleverly.
Here is my 2 cents!
Reply 2
Original post
by NitrotolueneOPTION A:
That's not the case. Alpha-1,6 glycosidic bonds are indeed involved in branching, to be certain, but glycogen phosphorylase, the primary enzyme that degrades glycogen, acts on the alpha-1,4 glycosidic bonds on the chain ends. You require a different enzyme to break the alpha-1,6 bonds. The actual reason you receive energy so quickly is due to the branching, which provides numerous sites for the enzyme to act upon, and not because 1-6 bonds are simpler to break.
OPTION D
Glycogen has short branches that have a lot of energy in a small area.
That's right! The branched structure isn't random—it keeps glycogen very condensed. Cells can store it with glucose, which they utilise for energy, without creating water balance issues. Plus, the branches serve as quick access points for enzymes. When your body all of a sudden requires more energy? Glycogen is broken down rapidly since there are numerous locations for it to start from.
So why should we care? The following are two reasons why it matters:
- Space saver: It's like being able to put a week's worth of groceries in a tiny fridge—cells can store a lot more glucose this way.
- Fast energy: More branches enable enzymes to function more quickly, supplying you with fast energy when you most need it (such as during a run or while cramming for an exam).
In brief, option D is true; glycogen's branching is nature's method of storing energy cleverly.
Here is my 2 cents!
That's not the case. Alpha-1,6 glycosidic bonds are indeed involved in branching, to be certain, but glycogen phosphorylase, the primary enzyme that degrades glycogen, acts on the alpha-1,4 glycosidic bonds on the chain ends. You require a different enzyme to break the alpha-1,6 bonds. The actual reason you receive energy so quickly is due to the branching, which provides numerous sites for the enzyme to act upon, and not because 1-6 bonds are simpler to break.
OPTION D
Glycogen has short branches that have a lot of energy in a small area.
That's right! The branched structure isn't random—it keeps glycogen very condensed. Cells can store it with glucose, which they utilise for energy, without creating water balance issues. Plus, the branches serve as quick access points for enzymes. When your body all of a sudden requires more energy? Glycogen is broken down rapidly since there are numerous locations for it to start from.
So why should we care? The following are two reasons why it matters:
- Space saver: It's like being able to put a week's worth of groceries in a tiny fridge—cells can store a lot more glucose this way.
- Fast energy: More branches enable enzymes to function more quickly, supplying you with fast energy when you most need it (such as during a run or while cramming for an exam).
In brief, option D is true; glycogen's branching is nature's method of storing energy cleverly.
Here is my 2 cents!
tysm!!
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