PYQPulse
HomeMocksPracticePYQsUpdatesDashboard
PYQPulse

Timing-accurate mock tests and PYQs for SSC, Banking and Railway exams — so the real paper feels like a revision.

Exams

  • SSC exams
  • Banking exams
  • Railway exams
  • All exams

Practice

  • Practice questions
  • Mock test series
  • Sectional tests
  • Year-wise PYQs
  • Performance analytics

Company

  • About us
  • Help Centre
  • Pricing
  • Sign in

Legal

  • Privacy Policy
  • Terms of Service

Contact

  • hello@testwala.co.in
  • Telegram
  • +91 62816 87760

Practice interface modeled on the official exam pattern — not the official examination. PYQPulse is not affiliated with the Staff Selection Commission, IBPS, SBI, RBI, NABARD, SEBI or Indian Railways.

© 2026 PYQPulse. All rights reserved.

Built for aspirants, by aspirants.

HomeMocksPracticeStats
  1. Home
  2. ›
  3. PYQs
  4. ›
  5. PPSC PCS
  6. ›
  7. 2025
  8. ›
  9. Q55

PPSC PCS 2025 · Question 55 of 100

Consider the following statements about enzymes: 1. Enzymes increase the activation energy of a reaction. 2. Enzymes work at their optimum temperature and pH. 3. The activity of enzymes cannot be affected by other compounds. 4. Enzymes need to be used in excess compared to the reagent to catalyse the reaction. How many of the above statements is/are correct?

Science & Tech

  1. AOnly oneCorrect
  2. BOnly two
  3. COnly three
  4. DAll four

Answer: A. Only one

Explanation

Only statement 2 is correct: enzymes work best at optimum temperature and pH, but they lower activation energy, can be inhibited, and act in catalytic (not excess) amounts.

Source: https://www.nimbusias.com/wp-content/uploads/2025/12/Punjab-PCS-GS-Original-Paper-2025.pdf

← Q54View full paper (100 questions)Q56 →

Practice the full PPSC PCS 2025 paper

Timed test with all 100 questions, just like the real exam.

Start test