Restriction endonuclease:
- cuts the DNA molecule randomly
- cuts the DNA molecule at specific sites
- restricts the synthesis of DNA inside the nucleus
- synthesizes DNA
The Correct Option is B
Solution and Explanation
Restriction endonucleases, also known as restriction enzymes, are enzymes that cleave DNA at specific recognition sequences or sites. These recognition sequences are typically palindromic sequences, and restriction enzymes cut the DNA at or near these specific sites. This is a fundamental tool in molecular biology and genetic engineering for manipulating DNA molecules.
So, the correct option is (B): cuts the DNA molecule at specific sites
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Concepts Used:
Enzymes
Catalysts of biological systems can be known as Enzymes. Enzymes helps us to perform the huge variety of biochemical reactions that encompass in life are all mediated by a series of activities.
Properties of Enzymes:
Following are the properties of enzymes:
- Enzymes initiate and speed up the reaction
- The enzyme’s activity is ph dependent
- Enzymes have the capacity to forward and reverse the reaction but do not decide the direction of the biochemical pathway
- An enzyme has a particular area on which the substrate interacts to produce the desired product
- Enzyme becomes unstable at varying ph, high temperature and heat
- It have protein like characteristics
- Substrates can be catalyzed with a small number of enzymes
- Enzyme activity represents absolute, relative, group and stereo specificities
- Some enzymes perform regulatory function
- It minimise activation energy (Ea)
- The enzymes remain unaffected before and after the product formation and it can be reused
- They are soluble both in water and NaCl.