The given graphs show the effects of temperature and pH on enzyme activity.Which of the given statements CORRECTLY matches the point on the graphs with the description of enzyme activity?
Correct answer: A. At point I, hydrogen bonds are formed between enzyme and substrate
- A. At point I, hydrogen bonds are formed between enzyme and substrate
- B. At point II, kinetic energy of enzyme and substrate is the highest.
- C. At point III, peptide bonds in the enzyme begin to break
- D. At point IV, the enzyme is completely denatured
Explanation
The correct answer is Option A. At point I, the enzyme operates under optimal conditions, allowing for effective formation of enzyme-substrate complexes through hydrogen bonding. Option B is incorrect because while kinetic energy may be high, it can lead to enzyme instability rather than effectiveness. Option C is incorrect as peptide bonds breaking signifies extreme conditions leading to denaturation, not just reduced activity. Option D is incorrect because complete denaturation is a severe condition that might not correspond directly to point IV depending on the graph specifics.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Factors Affecting Enzyme Action
Enzyme activity changes with temperature, pH, substrate concentration and enzyme concentration because these factors affect molecular collisions and the active site. Questions also examine optimum conditions, denaturation and inhibition, while distinguishing a fall in activity caused by unsuitable conditions from permanent enzyme damage.
Practise Enzymes
633 free Enzymes MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Factors Affecting Enzyme Action questions
If more substrate to already occurring enzymatic reaction is added more enzyme activity is seen because_____________?
The rate of reaction is directly proportional to the concentration of an enzyme which statement is incorrect in this respect_________________?
If the concentration of enzyme is kept constant and amount of substrate is increased a point is reached where increase in substrates concentration does not affect the reaction rate because of____________________?
The graph shows the effect of substrate concentration on the rate of an enzyme-catalysed reaction.The CORRECT interpretation of the graph is that between points:
To evaluate the activity of salivary amylase enzyme, students collected samples (I, II, III andIV) of amylase-starch mixture at different times and added a drop of iodine reagent to each sample.The given table shows the resulting colours and the amount of starch remaining in each sample.Based on the resulting colours of the iodine test, the sample which shows the highest level of amylase activity is
Saqib performed the following steps in sequence as a part of an experiment.1) Added equal amounts of starch solution into two test tubes, I and II2) Added salivary amylase to test tube I and boiled amylase solution to test tube II3) Shook the test tubes and left them in a water bath for 10 minutes at 37°C4) Added a few drops of iodine solution to each test tubeHe observed that the contents of test tube I turned reddish yellow in color, and test tube II maintained its blue color.The CORRECT inference that he must have made based on his observations of test tube I and test tube II is