The two strands of DNA are
- Similar and parallel
- Similar but antiparallel
- Complementary and antiparallel
- Complementary and parallel
The Correct Option is C
Approach Solution - 1
The correct option is (C): Complementary and antiparallel.
Approach Solution -2
Explanation:
- DNA or Deoxy-Ribonucleic acid is a complex molecular structure that carries genetic information for the functioning of all living organisms.
- DNA consists of two strands that are twisted together to form a spiral, this is known as the helical structure of the DNA.
- In a helical structure, the two strands of DNA are joined together by hydrogen bonds between specific nitrogenous bases.
- Adenine pairs with Thymine, and Cytosine pairs with Guanine, as a result of which the strands are complementary and not identical.
- DNA strands are known to be antiparallel as the two strands run in opposite directions. One strand runs from 5' to 3', while the other runs from 3' to 5'.
Approach Solution -3
DNA is a large molecule made of repeating units called nucleotides. Each nucleotide has:
- A 5-carbon sugar
- A phosphate group
- A nitrogenous base
DNA is a double helix with bases stacked perpendicularly to the main axis. The two strands are complementary, meaning:
- Adenine pairs with thymine
- Guanine pairs with cytosine
Nucleotides are joined by phosphodiester bonds. The strands are antiparallel, with one running 5'-3' and the other 3'-5'. This structure allows DNA to store and transmit genetic information.
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
Questions Asked in MHT CET exam
- Which disease is primarily spread by female Anopheles mosquitoes?
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- HIV and AIDS
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- tension
- Total genetic content of an organism is called
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- Non-Mendelian Genetics
- How many ATP molecules are needed as an initial investment in the glycolytic cycle (normal glycolysis)?
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- Glycolysis
- If \(A=\begin{bmatrix} 2a & -3b\\ 3 & 2\end{bmatrix}\) and \(\text{adj}A = AA^T\), then 2a+3b is?
- MHT CET - 2023
- Matrices
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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