CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
3rd Edition
ISBN: 9780135686065
Author: Urry
Publisher: PEARSON
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Chapter 14.4, Problem 2CC
Discuss the ways in which rRNA structure likely contributes to ribosomal function.
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The two-dimensional structures of mRNA, tRNA, and rRNA are shown in the diagrams.
Which of the following might be one contributing factor to the function of rRNA based on comparisons between the structures of the three molecules?
A - rRNA molecules are sufficiently flexible because they contain more RNA loops.
B - rRNA molecules are more reactive because they have longer chains of unmatched bases.
C - rRNA molecules are sufficiently stable because the sequence of bases allows for more internal hydrogen bonds.
D - rRNA molecules are more rigid because they have a more regular sequence of bases than other RNA molecules.
Define ribosomal RNA (rRNA)
The two-dimensional structures of mRNA, tRNA, and rRNA are shown in the diagrams.
TRNA
MRNA
FRNA
Which of the following might be one contributing factor to the function of rRNA based on
comparisons between the structures of the three molecules?
rRNA molecules are sufficiently flexible because they contain more RNA loops.
rRNA molecules are more reactive because they have longer chains of unmatched bases.
rRNA molecules are sufficiently stable because the sequence of bases allows for more
internal hydrogen bonds.
FRNA molecules are more rigid because they have a more regular sequence of bases than
other RNA molecules.
Chapter 14 Solutions
CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
Ch. 14.1 - MAKE CONNECTIONS In a research article about...Ch. 14.1 - What polypeptide product would you expect from a...Ch. 14.1 - DRAW IT The template strand of a gene contains the...Ch. 14.2 - What is a promoter? Is it located at the upstream...Ch. 14.2 - What enables RNA polymerase to start transcribing...Ch. 14.2 - WHAT IF? Suppose X-rays caused a sequence change...Ch. 14.3 - Given that there are about 20,000 human genes, how...Ch. 14.3 - How is RNA splicing similar to how you would watch...Ch. 14.3 - WHAT IF? What would be the effect of treating...Ch. 14.4 - What two processes ensure that the correct amino...
Ch. 14.4 - Discuss the ways in which rRNA structure likely...Ch. 14.4 - Describe how a polypeptide to be secreted is...Ch. 14.4 - WHAT IF? DRAW IT Draw a tRNA with the anticodon...Ch. 14.5 - What happens when one nucleotide pair is lost from...Ch. 14.5 - Prob. 2CCCh. 14.5 - WHAT IF? DRAW IT The template strand of a gene...Ch. 14 - In eukaryotic cells, transcription cannot begin...Ch. 14 - Prob. 2TYUCh. 14 - The anticodon of a particular tRNA molecule is A....Ch. 14 - Prob. 4TYUCh. 14 - Which component is not directly involved in...Ch. 14 - Prob. 6TYUCh. 14 - Prob. 7TYUCh. 14 - Prob. 8TYUCh. 14 - Prob. 9TYUCh. 14 - SCIENTIFIC INQUIRY Knowing that the genetic code...Ch. 14 - Prob. 11TYUCh. 14 - FOCUS ON INFORMATION Evolution accounts for the...Ch. 14 - SYNTHESIZE YOUR KNOWLEDGE Some mutations result in...
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- Discuss why you think the ribosomes need to contain so many proteins and rRNA molecules. Does it seem like a waste of cellular energy to make such a large structure so that translation can occur?arrow_forwardAt least three types of RNA are required for protein synthesis. Compare and contrast mRNA, rRNA, and tRNA by moving the descriptions of their structure and function to the appropriate categories. Some phrases may describe all three types of RNA. mRNA in eukaryotes, can exist outside the nucleus acts as an enzyme for peptide synthesis composed of ribonucleic acid rRNA Answer Bank moves amino acids to the site of protein synthesis tRNA contains nucleotide triplets that code for specific amino acids has a convoluted structure with a three-base sequence called an anticodon moves genetic information out of the nucleus and into the cytoplasm mRNA, rRNA, and tRNAarrow_forwardDefine the various forms of rRNA found in bacteria ?arrow_forward
- Discuss the significance of modified bases within tRNA molecules.arrow_forwardIdentify if the statement is correct or incorrect, "rRNA serves as template for the synthesis of polypeptide."arrow_forwardExplain the function of spliceosomes in eukaryotic cells. The following sequence represents pre-mRNA derived from a gene coding for alpha keratin in birds. Label the sequence to show potential exon(s), intron(s) and spliceosome cut site(s). That is, put the intron(s) sequences in parentheses and use black slash symbols (/) to indicate the spliceosome cut site(s). What is the sequence of the mature MRNA after splicing? [ 5' AUGGGUUUAGGACCCCCGAUAAA 3'arrow_forward
- Describe the structural features that all tRNA molecules have in common.arrow_forwardAs with all biomolecules, rRNA has a structure that directly relates to its function. Which statement describes the relationship between the structure and function of rRNA? * The small subunit provides anticodons for the mRNA molecule to build a polypeptide chain. A large subunit attaches to MRNA while a small subunit attracts RNA polymerase to build a polypeptide chain. The large subunit has three different openings for the specific enzymes required for translation of mRNA. A small subunit attaches to MRNA after which a large subunit attaches on top, with openings for TRNA molecules that will build a polypeptide chain.arrow_forwardBriefly describe the function of the following in protein synthesis. a. rRNA b. tRNA c. mRNAarrow_forward
- Identify the features of tRNA that are important in decoding genetic information and converting it into protein language.arrow_forwardWhat evidence supports the view that ribosomal RNAs are a more important component of the ribosome than the ribosomal proteins?arrow_forwardConsider the mRNA sequence below. Assume that the following mRNA segment has been translated. 5'-GCAAGUCUUAAU-3' Note for numbers 1 and 2: Use the three-letter abbreviation of amino acid; separate amino acids with a hyphen: do not include the stop codon. Example: ala-cys-glu 1. Using the table of the genetic code, determine the sequence of amino acids. ala-ser-leu-asn 2. If mutation occurs by substitution of the 6th nucleotide with adenosine-5'- monophosphate, what is the resulting amino acid sequence? 3. What type of mutation occurred? Choose from same sense, missense and non-sense.arrow_forward
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