The activation energy of a reaction could in principle be supplied by heat, but cells use enzymes instead because heating would
Correct answer: B. damage cellular molecules and speed all reactions indiscriminately
- A. slow every reaction down
- B. damage cellular molecules and speed all reactions indiscriminately
- C. destroy the substrates
- D. prevent products from forming
Explanation
Raising temperature speeds every reaction and denatures proteins, so it cannot give the selective control life needs. An enzyme lowers the barrier for one specific reaction at body temperature, which is precisely why metabolism can run fast at 37 degrees.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Characteristics of Enzymes
Enzymes are globular biological catalysts that lower activation energy without being consumed, usually showing specificity for particular substrates. Questions cover active sites, enzyme substrate complexes, the lock and key and induced fit models, intracellular and extracellular action, and the effects of denaturation, while distinguishing enzymes from non biological catalysts.
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 Characteristics of Enzymes questions
Enzymes are needed inside cells in only minute quantities because they
An enzyme changes the rate of a reaction without altering its
Which sequence correctly represents enzyme catalysis?
When the substrate is present in excess, doubling the concentration of enzyme will
Trypsin, working in the small intestine, has an optimum pH of about
In an experiment on enzyme activity a buffer solution is used in order to