Question:
The 5' cap of eukaryotic mRNAs contains
The 5' cap of eukaryotic mRNAs contains
Show Hint
Remember: The 5' cap is essential for mRNA stability and translation initiation.
Updated On: Sep 8, 2025
- a modified guanine nucleotide
- a modified adenine nucleotide
- a modified cytosine nucleotide
- a modified uracil nucleotide
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Recall the function of the 5' cap.
- The 5' cap is a modified guanine nucleotide added to the 5' end of eukaryotic mRNAs. - It protects the mRNA from degradation and assists in ribosome binding during translation.
Step 2: Analyze the options.
- (A) Correct: The 5' cap is composed of a modified guanine nucleotide (7-methylguanosine).
- (B) Incorrect: The 5' cap does not contain adenine.
- (C) Incorrect: The 5' cap does not contain cytosine.
- (D) Incorrect: The 5' cap does not contain uracil.
Step 3: Conclusion.
The 5' cap contains a modified guanine nucleotide. Final Answer: \[ \boxed{\text{The 5' cap contains a modified guanine nucleotide.}} \]
- The 5' cap is a modified guanine nucleotide added to the 5' end of eukaryotic mRNAs. - It protects the mRNA from degradation and assists in ribosome binding during translation.
Step 2: Analyze the options.
- (A) Correct: The 5' cap is composed of a modified guanine nucleotide (7-methylguanosine).
- (B) Incorrect: The 5' cap does not contain adenine.
- (C) Incorrect: The 5' cap does not contain cytosine.
- (D) Incorrect: The 5' cap does not contain uracil.
Step 3: Conclusion.
The 5' cap contains a modified guanine nucleotide. Final Answer: \[ \boxed{\text{The 5' cap contains a modified guanine nucleotide.}} \]
Was this answer helpful?
0
0
Top Questions on Biotechnology
The vector, shown in the figure, has promoter and RBS sequences in the 300 bp region between the restriction sites for enzymes X and Y. There are no other sites for X and Y in the vector. The promoter is directed towards the Y site. The insert containing only an ORF provides 3 fragments after digestion with both enzymes X and Y. The ORF is cloned in the correct orientation in the vector using the single restriction enzyme Y. The size of the largest fragment of the recombinant plasmid expressing the ORF upon digestion with enzyme X is ........... bp. (answer in integer)
- IIT JAM BT - 2025
- Biotechnology
- Biotechnology
- Which of the following condition(s) lead(s) to reduced affinity of O2 for human hemoglobin?
- IIT JAM BT - 2025
- Biotechnology
- Biotechnology
Which of the following is/are CORRECT for the two molecules shown?
- IIT JAM BT - 2025
- Biotechnology
- Biotechnology
- Match the pair of organisms in Group I with their community interaction pattern in Group II. \[ \begin{array}{c|c} \text{Group I} & \text{Group II} \\ \hline P:\; \text{Cattle egrets – African buffalo} & 3:\; \text{Commensalism} \\ Q:\; \text{Lynx – Fox} & 1:\; \text{Competition} \\ R:\; \text{Acacia tree – Pugnacious ants} & 4:\; \text{Mutualism} \\ S:\; \text{Leopard – Antelope} & 2:\; \text{Predation} \\ \end{array} \]
- IIT JAM BT - 2025
- Biotechnology
- Biotechnology
- In a reaction \( A + B \to C \), the initial rate of formation of C at 25°C was measured for different initial concentrations of A and B as given. The overall order of the reaction with respect to both A and B is ................. (answer in integer)
% Requires: \usepackage{graphicx} \begin{table}[h] \centering \begin{tabular}{|c|c|c|c|} \hline Experiment & Initial [A] & Initial [B] & Initial rate of formation of C
& (mol L\textsuperscript{-1}) & (mol L\textsuperscript{-1}) & (mol L\textsuperscript{-1} s\textsuperscript{-1})
\hline 1 & 0.4 & 0.3 & 0.078
2 & 0.8 & 0.3 & 0.312
3 & 0.4 & 0.6 & 0.156
4 & 0.8 & 0.6 & 0.624
\hline \end{tabular} \caption{Experimental data showing initial concentrations and rates of formation.} \label{tab:experimental_data} \end{table} \flushleft \newpage- IIT JAM BT - 2025
- Biotechnology
- Biotechnology
View More Questions
Questions Asked in IIT JAM BT exam
- Match the animals in Group I with the major form of excreted nitrogen metabolite in Group II. \[ \begin{array}{c|c} \text{Group I} & \text{Group II} \\ \hline P:\; \text{Bony fishes} & 3:\; \text{Ammonia} \\ Q:\; \text{Lions} & 1:\; \text{Urea} \\ R:\; \text{Birds} & 2:\; \text{Uric acid} \\ \end{array} \]
- IIT JAM BT - 2025
- Metabolism
Identify the taxa that constitute a paraphyletic group in the given phylogenetic tree.
- IIT JAM BT - 2025
- Genetics
- If \[ P = \begin{pmatrix} \cos\alpha & \sin\alpha \\ -\sin\alpha & \cos\alpha \end{pmatrix} \] and \(P + P^T = I\), the value of \(\alpha \; (0 \leq \alpha \leq \pi/2)\) is
- IIT JAM BT - 2025
- Mathematics
- A rare genetic disorder resulting from homozygosity for a recessive allele (\( r \)) occurs in 2 out of every 10,000 individuals in a population. Assuming that (i) the disorder is not lethal, (ii) the disorder does not impact reproductive success, (iii) no new mutations are introduced in the population, and (iv) the population follows Hardy-Weinberg equilibrium, the percentage (%) of the carriers in the population that pass the \( r \) allele to offspring is .......... (rounded off to 1 decimal)
- IIT JAM BT - 2025
- Genetics
- The length of the edge of a variable cube is increasing at the rate of 25 cm s\(^{-1}\). If the initial length of the edge of the cube is 10 cm, the rate of increase of the surface area of the cube is .............. cm\(^2\) s\(^{-1}\). (answer in integer)
- IIT JAM BT - 2025
- Mathematics
View More Questions