What is true for plasmid
- Plasmids are widely used in gene transfer
- These are found in virus
- Plasmid contain gene for vital activities
- These are main part of chromosome
The Correct Option is A
Solution and Explanation
The statement that is true for plasmids is: (A) Plasmids are widely used in gene transfer. Plasmids are small, circular pieces of DNA that can be found in many types of cells, including bacteria. They are often used in genetic engineering and biotechnology for gene transfer and as vectors to introduce specific genes into host organisms. The other statements are not accurate: (B) Plasmids are not found in viruses. They are typically found in bacteria, archaea, and some eukaryotic cells. (C) While plasmids can contain genes that provide certain advantages to the host cell, they do not necessarily contain genes for all vital activities. (D) Plasmids are separate from the main chromosomal DNA in a cell and are not considered a main part of the chromosome.
Top Questions on Biotechnology
- The basic scheme of the essential steps involved in the process of recombinant DNA technology is summarised below in the form of a flow diagram. Study the given flow diagram and answer the questions that follow: \begin{center} Step-1 \quad Plasmid DNA (cut using Restriction Enzyme EcoR I) \quad + \quad Foreign DNA (cut using Restriction Enzyme EcoR I)
$\downarrow$
DNA ligase
$\downarrow$
Step-2 \quad Recombinant DNA molecule
$\downarrow$
Step-3 \quad Transfer of recombinant DNA molecule to the host cell
$\downarrow$
Step-4 \quad Replication of recombinant DNA molecule in the host cell \end{center} (a) Name the specific enzyme that might have been used to make the multiple copies of foreign DNA before undergoing Step-1 of the process.
(b) How does the use of restriction enzyme EcoR I in Step-1 facilitate the action of DNA ligase to form the recombinant DNA molecule? Explain.
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Concepts Used:
Enzymes - Biology
Enzymes are proteins that help accelerate metabolism or the chemical reactions in our bodies. They build some substances and decompose others. All living creatures have enzymes.
Our bodies naturally build enzymes. But enzymes are also in mass produce products and food.
One of the most important roles of enzymes is to succor digestion. The process of turning the food that we eat into energy is called digestion. For instance, there are enzymes in our saliva, pancreas, stomach, and intestines. They decompose fats, proteins, and carbohydrates. Enzymes make use of these nutrients for growth and cell repair.