Plasmid used to construct the first recombinant $DNA$ was isolated from which bacterium species?
- Escherichia coli
- Salmonella typhimurium
- Agrobacterium tumefaciens
- Thermus aquaticus
The Correct Option is B
Solution and Explanation
Top Questions on The DNA
- Which of the following statement(s) about eukaryotic DNA topoisomerase is/are correct?
- What is the fate of a piece of DNA carrying only gene of interest which is transfered in to an alien organism?
A. The piece of DNA would be able to multiply itself independently in the progeny cells of the organism.
B. It may get integrated into the genome of the recipient.
C. It may multiple and be inherited along with the host DNA.
D. The alien piece of DNA is not an integral part of chromasame.
E. It shows ability to replicate.
Choose the correct answer from the options given below: - The DNA present in chloroplast is:
- Hind II always cuts DNA molecules at a particular point called recognition sequence and it consists of:
- Arrange the following steps of ‘Polymerase chain Reaction’ in a correct sequence.
(A) Annealing of primers
(B) Amplified DNA
(C) Denaturation of DNA
(D) Extension of primers
Choose the correct answer from the option given below
Concepts Used:
Discovery of DNA
DNA - Discovery
Many individuals believe that American biologist - "James Watson" and English physicist - “Francis Crick” discovered DNA in the 1950s. Actually, this is not the case. Preferably, DNA was first recognized in the late 1860s by Swiss chemist - “Friedrich Miescher”.
Read More: Structure of DNA
What actually DNA is?
DNA is self-replicating material that exists in every living organism. In easiest terms, it is a carrier of all genetic information. It contains the instructions required for organisms to develop, grow, survive, and reproduce. It’s one of the longest molecules that contain our genetic “code,” or recipe. This recipe is the initial point for our development, but DNA’s interaction with outside impacts such as our lifestyle, environment, and nutrition ultimately forms human beings.
DNA is a composition of molecules known as nucleotides. Each nucleotide comprises a sugar and phosphate group, also nitrogen bases. These nitrogen bases are further tumbledown into four types, including:
- Adenine (A)
- Cytosine (C)
- Guanine (G)
- Thymine (T)
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