Question:

Sequence of which of the following is used to know the phylogeny

Updated On: Jun 5, 2024

m-RNA
r-RNA
t-RNA
DNA

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The Correct Option is B

Solution and Explanation

The correct option is (B) : r-RNA

A molecule that hasn't changed significantly through time must be researched in order to identify phylogeny, which is the resemblance between creatures and their ancestors. Ribosomal RNA is therefore utilised to research the phylogeny since, according to Carl Woese, they are old molecules that are found throughout the lineage. These are the same ancestral molecules that may be employed in these experiments since the sequences are still preserved.

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Questions Asked in NEET exam

Match List I with List II :

List - I		List – II
A.	Residual Volume	i.	Maximum volume of air that can be breathed in after forced expiration
B.	Vital Capacity	ii.	Volume of air inspired or expired during normal respiration
C.	Expiratory Capacity	iii.	Volume of air remaining in lungs after forcible expiration
D.	Tidal Volume	iv.	Total volume of air expired after normal inspiration

Choose the correct answer from the options given below :

NEET (UG) - 2024
The respiratory system

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Match List I with List II:

List I		List II
A	Robert May	I	Species-Area relationship
B	Alexander von Humboldt	II	Long term ecosystem experiment using out door plots
C	Paul Ehrlich	III	Global species diversity at about 7 million
D	David Tilman	IV	Rivet popper hypothesis

Choose the correct answer from the options given below:

NEET (UG) - 2024
Species diversity

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The potential (V) at any axial point, at 2 m distance(r) from the centre of the dipole of dipole moment vector \(\vec{P}\) of magnitude, 4 × 10^-6 C m, is ± 9 × 10³ V.
(Take \(\frac{1}{4\pi\epsilon_0}=9\times10^9\) SI units)
Reason R : \(V=±\frac{2P}{4\pi \epsilon_0r^2}\), where r is the distance of any axial point, situated at 2 m from the centre of the dipole.
In the light of the above statements, choose the correct answer from the options given below :
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Concepts Used:

Structure of DNA and RNA

DNA Structure:

Human DNA is unique and is made up of 3 billion base pairs. However, 99% of them are the same in all humans. The sequence of these bases determines what information needs to be coded that is necessary for the organism's growth and development. During the process of transcription (when DNA is replicated), a product is formed known as RNA (Ribonucleic Acid). This RNA is responsible for translating genetic information from DNA to protein followed by reading through ribosomes.

Read More: Structure of DNA

RNA Structure:

The ribonucleic acid has all the components same to that of the DNA with only 2 main differences within it. RNA has the same nitrogen bases called the adenine, Guanine, Cytosine as that of the DNA except for the Thymine which is replaced by the uracil. Adenine and uracil are considered as the major building blocks of RNA and both of them form base-pair with the help of 2 hydrogen bonds.

RNA resembles a hairpin structure and like the nucleotides in DNA, nucleotides are formed in this ribonucleic material(RNA). Nucleosides are nothing but the phosphate groups which sometimes also helps in the production of nucleotides in the DNA.

Read More: Structure of RNA

List-I (Scientist)	List-II (Contribution)
(A) A. Jeffreys	(I) Nuclein
(B) Miescher	(II) Amino acid formation
(C) J. Monod	(III) DNA fingerprinting
(D) S.L. Miller	(IV) Transcriptionally regulated system