Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 10, Problem 1TY
Which of the following best represents the central dogma of gene expression?
- During transcription, DNA codes for polypeptides.
- During transcription, DNA codes for mRNA, which codes for polypeptides during translation.
- During translation, DNA codes for mRNA, which codes for polypeptides during transcription.
- None of the above are correct.
Expert Solution & Answer
Summary Introduction
Introduction:
The central dogma is a theory of molecular biology. It describes the process of gene expression in the living organism, which suggests that gene expression takes place in two steps, transcription and translation.
Answer to Problem 1TY
Option (b).
Explanation of Solution
Explanation for correct answer:
Option (b) During transcription, the DNA codes for mRNA and the mRNA codes for polypeptide in translation. According to the central dogma of molecular biology, the flow of genetic information is from DNA(RNA(Polypeptide. The DNA codes for the formation of mRNA in the process called transcription. The mRNA codes for polypeptide in the process is known as translation.
Explanation for the incorrect answer:
Option (a) During translation, DNA codes for the polypeptide. The translation is a process, in which mRNA codes for the polypeptide. Hence, it is an incorrect answer.
Option (c) During translation, DNA codes for mRNA and the mRNA codes for polypeptide during translation. According to central dogma, transcription is the process, in which DNA codes mRNA and translation is the process, in which mRNA codes for the polypeptide. Hence, it is not the correct answer.
Option (d) none of the above are correct. The correct answer is option (b), hence, it is an incorrect option.
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Students have asked these similar questions
Which of the following is true only for eukaryotic gene expression?
mRNA is synthesized in the 3' ---> 5' direction.
Translation of mRNA routinely begins before transcription is complete.
The mRNA transcript is the exact complement of the gene from which it was copied.
After transcription, a 3' poly-A tail and a 5' cap are added to mRNA.
RNA polymerase binds to the promoter region to begin transcription.
Which of the following is NOT a reason cells regulate gene expression at a level other than the transcriptional level?
Some proteins are only required in part of the cell and transcriptional control will only regulate the mRNA/protein throughout the cell.
The core promoter for many genes is the same, so these genes will always be transcribed in the same cells. Differential gene expression in different cell types requires
regulation of gene expression at levels other than transcription.
Transcription and translation are realtively slow processes, so cells need to regulate gene expression post-transcriptionally if they require a fast change in expression
of a gene.
Not all cells are transcriptionally active (meaning they do not transcribe any genes), so these cells need to regulate gene expression post-transcriptionally.
Which of the following scenario will result in greater consequences in terms of gene expression?
insertion or deletion of one nucleotide
insertion or deletion of three nucleotides
Explain why.
Chapter 10 Solutions
Principles of Biology
Ch. 10.1 - What is the direction of flow of genetic...Ch. 10.1 - Prob. 1TYKCh. 10.1 - Prob. 2TYKCh. 10.1 - Prob. 3TYKCh. 10.2 - How would removing a terminator from a gene affect...Ch. 10.2 - Prob. 1BCCh. 10.2 - Prob. 1TYKCh. 10.2 - Prob. 2TYKCh. 10.3 - Do the ends of protein-encoding genes have a poly...Ch. 10.3 - The splicing of pre-mRNA in eukaryotes involves...
Ch. 10.3 - Prob. 2TYKCh. 10.4 - Prob. 1CCCh. 10.4 - Prob. 2CCCh. 10.4 - Prob. 1TYKCh. 10.4 - Prob. 2TYKCh. 10.5 - Prob. 1CCCh. 10.5 - Prob. 1BCCh. 10.5 - Based on the gene sequences shown here, pick two...Ch. 10.5 - Prob. 1TYKCh. 10.5 - Prob. 2TYKCh. 10.5 - Prob. 3TYKCh. 10.6 - Prob. 1CCCh. 10.6 - Prob. 1TYKCh. 10.6 - Prob. 2TYKCh. 10 - Which of the following best represents the central...Ch. 10 - Prob. 2TYCh. 10 - Prob. 3TYCh. 10 - Prob. 4TYCh. 10 - Prob. 5TYCh. 10 - Prob. 6TYCh. 10 - The legion of a tRNA that is complementary to a...Ch. 10 - Prob. 8TYCh. 10 - Prob. 9TYCh. 10 - Prob. 10TYCh. 10 - Lets suppose a gene mutation changed the sixth...Ch. 10 - What is the function of an aminoacyl-tRNA...Ch. 10 - A principle of biology is that the genetic...Ch. 10 - Prob. 1CBQCh. 10 - Prob. 2CBQ
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