MC - Biochemistry Quiz - L8-L11
MC - Biochemistry Quiz
Test your knowledge of biochemistry with this engaging multiple-choice quiz! Designed for students and enthusiasts alike, this quiz covers various fundamental concepts from cellular metabolism to the structure of carbohydrates.
Key Features:
- Multiple choice questions to assess your understanding
- Covers a range of topics including enzyme fun
ction, digestion, and energy metabolism - Ideal for students preparing for exams or anyone looking to refresh their biochemistry knowledge
What is the chemical difference between cellulose and chitin?
Replacement of the hydroxyl group at C3 with an acetylated amino group
Replacement of the hydroxyl group at C2 with an acetylated amino group
Replacement of the hydroxyl group at C4 with an acetylated amino group
Replacement of the hydroxyl group at C5 with an acetylated amino group
How is ATP hydrolysis used to power other cellular reactions?
It is coupled with endergonic reactions
It produces water which is used to fuel other reactions.
It adds a phosphate to ADP
It acts as an enzymatic catalyst.
The drug as examples of competitive inhibitors is
Stalevo
Starlix
Statin
Streptomycin
Opposing degradative and biosynthetic pathways
Use the same enzymes for many steps.
Use different enzymes for steps that require large energy changes.
Are coordinately regulated at the steps that use different enzymes
Are used in both directions in most organisms
All of the above
Compared with the resting state, vigorously contracting skeletal muscle shows:
Decreased AMP/ATP ratio.
Decreased levels of fructose 2,6-bisphosphate
Increased reduction of pyruvate to lactate
Decreased NADH/NAD+ ratio
Increased oxygen availability
About digestion of starch which statement is true 1- It's begins in moth by amylase in saliva 2- Continue to the large intestine by pancreatic amylase become a mixture of a small oligosaccharides
Both are true
The first is true and the second is false
The first is false and the second is true
Both are false
When it functions as a "second messenger", cAMP
Acts outside the cell to influence cellular processes
Acts "second in importance" to AMP
Activates all cytosolic protein kinases.
Activates the cAMP-dependent protein kinase
Binds to calmodulin causing it to bind Ca2+.
The diagram shows part of a cellulose molecule.Name the molecule labelled A
alpha glucose
Beta glucose
Fructose
Amino acid
Which of the following glucose transporter (GLUT) are important in insulin-dependent glucose uptake?
) GLUT1
) GLUT2
) GLUT3
) GLUT4
The Km (Michaelis constant) of an enzyme-catalyzed rection (select one or more)
Is a measure of the turnover rate of the enzyme
Is a measure of the affinity of the enzyme for its substrate
Has a higher numerical value when the enzyme has high affinity for its substrate.
Has a lower numerical value when the enzyme has high affinity for its substrate
Is the substrate concentration when the reaction rate is half of the maximum rate.
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