Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 9, Problem 1SQ
A chromosome contains many different genes that are transcribed into different ___ .
- a. proteins
- b. polypeptides
- c. RNAs
- d. a and b
Expert Solution & Answer
Summary Introduction
Introduction: The genetic information of DNA is based on the nucleotide base sequences. These sequences are transcribed into mRNA triplets and are called codons. These mRNA triplet nucleotides are then translated to form a polypeptide that codes for specific proteins and enzymes.
Answer to Problem 1SQ
Correct answer: A chromosome contains many different genes that are transcribed into different RNAs. Therefore, option c. is correct.
Explanation of Solution
Reason for the correct statement:
DNA consists of genetic instructions in the form of gene sequences. It directs messenger RNA (mRNA) synthesis in the cell. During formation of mRNA in a process known as transcription, each letter in the gene sequence is copied that codes for a particular amino acid. Thus, different genes are transcribed into different mRNAs.
Hence, option c. is correct.
Reasons for the incorrect statements:
Option a. is given as “proteins”. Proteins refer to a long chain of polypeptides formed after translation. Hence, it is a wrong answer.
Option b. is given as “polypeptides”. Polypeptides are formed from mRNA during translation process, so it is a wrong answer.
Option d. is given as “a. and b.” Polypeptides and proteins are synthesized by translation, so it is a wrong answer.
Hence, options a., b., and d. are incorrect.
Conclusion
During transcription, different genes transcribe into different mRNAs.
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Chapter 9 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 9 - A chromosome contains many different genes that...Ch. 9 - A binding .site for RNA polymerase is called a ___...Ch. 9 - An RNA molecule is typically ______; a DNA...Ch. 9 - RNAs form by_____; proteins form by ________. a....Ch. 9 - The main function of a DNA molecule is to ________...Ch. 9 - The main function of an mRNA molecule is to ___ ....Ch. 9 - Prob. 7SQCh. 9 - Prob. 1DAACh. 9 - Prob. 2DAACh. 9 - Prob. 3DAA
Ch. 9 - Prob. 4DAACh. 9 - Prob. 8SQCh. 9 - Anticodons pair with ___ . a. mRNA codons b. DNA...Ch. 9 - Up to ______ amino adds can be encoded by an mRNA...Ch. 9 - Prob. 11SQCh. 9 - Prob. 12SQCh. 9 - Prob. 13SQCh. 9 - Energy that drives translation is provided mainly...Ch. 9 - Match the terms with the best description. __...Ch. 9 - Researchers are designing and testing antisense...Ch. 9 - An anticodon has the sequence GCG. What amino acid...Ch. 9 - Each position of a codon can be occupied by one of...Ch. 9 - Prob. 4CTCh. 9 - Translate the .sequence of bases in the previous...Ch. 9 - Bacteria use the.same stop codons as eukaryotes....
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