Concept explainers
Introduction: Ribonucleic acid (RNA) is a
Answer to Problem 1MC
Correct answer: Option b. “messenger RNA”.
Explanation of Solution
Reason for the correct answer:
Option b. is given as “messenger RNA”.
Messenger RNA (mRNA) functions as an information carrier from DNA in the nucleus to the ribosome in cytoplasm of the cell. This information is used by the cell to direct the synthesis of proteins. Group of three bases in mRNA is called codons that specify which amino acid will be incorporated into a protein.
Hence, option b. is correct.
Reasons for incorrect answers:
Option a. is given as “ribosomal RNA”.
Ribosomal RNA is responsible for the production of ribosomes at which polypeptide chains are formed during translation. Hence, option a. in incorrect.
Option c. is given as “transfer RNA”.
Transfer RNA transfers the amino acid to the ribosomal unit in translation process by which the information in mRNA is translated into protein molecules. Hence, option c. is incorrect.
Option d. is given as “noncoding RNA”.
Non-coding RNA is transcribed from DNA, but is not translated into proteins.
Hence, option d. is incorrect.
Hence, options a., c., and d. are incorrect.
Messenger RNA carries the genetic information from DNA to the cytoplasm which is then used for protein synthesis.
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Chapter 13 Solutions
Biology
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- Treating a cell with a drug to stop tRNA from doing its job would mean what? A. that ribosomes would fall apart B. that sugars would not be added to proteins C. that nothing would be available to translate D. that amino acids would not be brought to the growing proteinarrow_forwardWhich of the following best describes mRNA?Group of answer choices a) Complexes with ribosomal proteins to form ribosomes b) Transports amino acids to ribosomes during translation c) Provides the instructions for the amino acid sequence of a polypeptide d) Used for eukaryotic RNA processingarrow_forwardAfter RNA polymerase binds to DNA, it begins making mRNA. What is the name of this process?arrow_forward
- What is the genetic code? a. The relationship between a three-base codon sequence and an amino acid or the end of translation b. The entire base sequence of an mRNA molecule c. The entire sequence from the promoter to the terminator of a gene d. The binding of tRNA to mRNAarrow_forwardWhich of the following BEST describes the characteristics and function of siRNA? A. a short strand of RNA that can complement and inactivate a sequence of mRNA B. a short strand of RNA that can act as a transcription factor to initiate transcription C. a strand of DNA that can bind to and inactivate an mRNA sequence D. a tRNA that is not able to attach to a ribosome and therefore inhibits the process of translationarrow_forwardWhich statement is true of the translocation phase of elongation during protein synthesis? a. The empty tRNA moves to the A site of the ribosomal complex. b. The empty tRNA moves to the T site of the ribosomal complex. c. The dipeptide moves from the A site to the P site of the ribosomal complex. d. The dipeptide moves from the P site to the A site of the ribosomal complex.arrow_forward
- Which enzyme links amino acids to the 3’ OH group of an RNA? (a) ribozyme (b) peptidyl transferase (c) DNA polymerase I (d) RNA polymerase II (e) amino-acyl tRNA synthetasearrow_forwardHow do we call the type of point mutation in which an A->U change occurs in the codon for the sixth amino acid in hemoglobin chain b? a) Inversion b) Transversion c) Transition d) Transaminationarrow_forwardWhich of the following is the function of transfer RNA? a.Makes up the structure of ribosomes b.Stores genetic information c.Carries the message that guides polypeptide assembly d.Delivers amino acids to ribosomesarrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College