The codons UUU and UUC codes for phenylalanine only. This feature of genetic code is called
- commaless
- non-overlapping
- degenerate
- non-ambiguous
The Correct Option is C
Solution and Explanation
Top Questions on Structure of DNA and RNA
- Two statements, Assertion and Reason are given. Choose the correct option from the following.
Assertion: In the secondary structure of RNA, double helix structure is formed.
Reason: In the double structure of RNA, two nucleic acid chains are wound about each other and held together by hydrogen bonds between pairs of bases.- COMEDK UGET - 2024
- Chemistry
- Structure of DNA and RNA
- Approximately how long is the DNA molecule in a single human cell if stretched out?
- MHT CET - 2024
- Biology
- Structure of DNA and RNA
- Which of the following is not present in RNA?
- MHT CET - 2024
- Biology
- Structure of DNA and RNA
- Bond present between two nucleotides on a single strand of DNA is:
- MHT CET - 2024
- Biology
- Structure of DNA and RNA
- Match List-I with List-II:
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 - CUET (UG) - 2024
- Biology
- Structure of DNA and RNA
Questions Asked in KCET exam
If \( r \) and \( r' \) denote the angles inside the prism having angle of prism \( 50^\circ \), considering that during the interval of time from \( t = 0 \) to \( t = T \), \( r \) varies with time as \( r = 10^\circ + t^2 \). During this time \( r' \) will vary with time as
- KCET - 2025
- Refraction
The variations of resistivity \( \rho \) with absolute temperature \( T \) for three different materials X, Y, and Z are shown in the graph below. Identify the materials X, Y, and Z.
- KCET - 2025
- Conductance
The graph between variation of resistance of a wire as a function of its diameter keeping other parameters like length and temperature constant is
- KCET - 2025
- Resistance
Which of the following graphs represent the variation of magnetic field \( B \) with perpendicular distance \( r \) from an infinitely long, straight conductor carrying current?
- KCET - 2025
- Magnetic Field
The anode voltage of a photocell is kept fixed. The frequency of the light falling on the cathode is gradually increased. Then the correct graph which shows the variation of photo current \( I \) with the frequency \( f \) of incident light is
- KCET - 2025
- Photoelectric Effect
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