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Q53 (NDA-I/2010) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Human anatomy physiology Answer Verified

Biological catalysts in living organisms are known as

Result
Your answer: —  Â·  Correct: D
Explanation

Biological catalysts in living organisms are known as enzymes. These substances are essential for life processes because they significantly accelerate the rate of specific chemical reactions within cells by lowering the activation energy required for the reaction to occur [t1][t2][t9]. While most enzymes are proteins, some RNA molecules (ribozymes) also exhibit catalytic activity [t1][t2]. Unlike hormones, which act as chemical messengers to initiate reactions and are often consumed, enzymes function as catalysts that are not destroyed or permanently altered during the reaction, allowing them to be used repeatedly [t1][t3][t7]. Enzymes are highly specific, meaning a particular enzyme typically catalyzes only one specific biochemical reaction [c2][t1]. Without these biocatalysts, essential processes like digestion and metabolism would occur too slowly to sustain life [c1][t6].

Sources

  1. [1] https://www.genome.gov/genetics-glossary/Enzyme
  2. [2] https://www.ncbi.nlm.nih.gov/books/NBK9921/
  3. [3] Science , class X (NCERT 2025 ed.) > Chapter 13: Our Environment > Activity 13.5 > p. 214
  4. [4] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > How do living things get their food? > p. 81
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SIMILAR QUESTIONS

CDS-II · 2016 · Q24 Relevance score: -1.08

Biological catalysts are protein molecules which 1. speed up a chemical reaction 2. remain unchanged after reaction 3. function optimally at 37 °C 4. do not have an enzymatic activity Select the correct answer using the code given below.

CDS-I · 2025 · Q78 Relevance score: -4.33

The enzymes which catalyze the same reaction but have different amino acid compositions are commonly referred as :

IAS · 2011 · Q7 Relevance score: -4.74

Microbial fuel cells are considered a source of sustainable energy. Why?

  1. They use living organisms as catalysts to generate electricity from certain substrates.
  2. They use a variety of inorganic materials as substrates.
  3. They can be installed in waste water treatment plants to cleanse water and produce electricity.

Which of the statements given above is/are correct?