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
- Which of the following is not a type of RNA?a. nRNA (nuclear RNA)b. mRNA (messengerc. rRNA (ribosomal RNA)d. tRNA (transfer RNA)arrow_forwardFor each of the following, identify the type of RNA involved (mRNA, rRNA, or tRNA). a. Transports the correct amino acid to the ribosome, using the information encoded in the mRNA. b. Is a major component of ribosomes. c. Specifies the order of amino acids in a protein, using a series of three-base codons, where different amino acids are specified by particular codons. d. Contains a three-base anticodon that pairs with a complementary codon revealed in the mRNA. e. Assists in making the bonds that link amino acids together to make a protein.arrow_forwardDefine the following terms: a. rRNA b. tRNA c. mRNA d. siRNA e. miRNAarrow_forward
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- Which of the following are encoded in the terminating codon in protein synthesis? a. Selenocycteine and Pyrrolysine b. GABA and Homocysteine c. Hydroxyproline and Selenocycteine d. Ornithine and Citrullinearrow_forwardWhich of the following molecule functions in the SAME compartment in which it is synthesized? A. mRNA B. tRNA C. snRNA D. rRNAarrow_forwardSelect the description of an intron. (If possible, please explain why it is that answer) a.) sequence of adenine nucleotides added onto the end of pre‑mRNA b.) modified form of a guanine nucleotide added onto the end of pre‑mRNA c.) coding portion of a DNA sequence that is present in mature mRNA d.) noncoding portion of a DNA sequence that is removed from pre‑mRNAarrow_forward
- Arrange the statements in their proper order by writing the corresponding letter (e.g. A) for each statement in the space provided below. A. The single-stranded RNA would complement the target RNA. B. Gene expression is inactivated once the mRNA is no longer accessible for translation. C. The risk-induced silencing complex which is composed of RNA and protein subunits is formed. D. Double-stranded, non-coding RNA is cleaved by Dicer. E. The mRNA can be cleaved or remain bound by the RISC. 1. 2. 3. 4. 5.arrow_forwardResearchers screening the blood of an advanced prostate cancer patient identified a 21 base pair long RNA molecule deemed to be potential importance as a biomarker of disease. Subsequent experiments using this molecule showed that it decreased retinoblastoma (Rb) protein levels. Based on this activity, what type of RNA is this molecule? A. Transfer RNA B. Micro RNA C. Circular RNA D. Ribosomal RNA E. Messenger RNAarrow_forwardThe process of forming RNA from DNA is called a. mitosis. b. DNA replication. c. translation. d. transcription.arrow_forward
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