BROOKER BIOLOGY
5th Edition
ISBN: 9781307656152
Author: BROOKER
Publisher: MCG/CREATE
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Chapter 6.2, Problem 1EQ
Summary Introduction
To determine: The reason that it is essential to purify individual subunits of RNase P to show that it is a ribozyme.
Introduction: RNase P acts as a catalyst during the processing of transfer RNA (Ribose
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Chapter 6 Solutions
BROOKER BIOLOGY
Ch. 6.1 - Which do you think has more entropy, a NaCl...Ch. 6.1 - Prob. 2CCCh. 6.2 - Prob. 1CCCh. 6.2 - Prob. 2CCCh. 6.2 - Prob. 1CSCh. 6.2 - Prob. 1EQCh. 6.2 - Prob. 2EQCh. 6.2 - Prob. 3EQCh. 6.3 - Prob. 1CSCh. 6.3 - Prob. 2CS
Ch. 6.4 - What are advantages of protein degradation?Ch. 6 - Reactions that release free energy are a....Ch. 6 - Enzymes speed up reactions by a. providing...Ch. 6 - Prob. 3TYCh. 6 - Researchers analyzed a cell extracta mixture of...Ch. 6 - In biological systems, ATP functions by a....Ch. 6 - In a chemical reaction, NADH is converted to NAD+...Ch. 6 - Prob. 7TYCh. 6 - Prob. 8TYCh. 6 - Prob. 9TYCh. 6 - Autophagy provides a way for cells to a. degrade...Ch. 6 - Prob. 1CQCh. 6 - Prob. 2CQCh. 6 - Prob. 3CQCh. 6 - Prob. 1COQCh. 6 - Prob. 2COQ
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- Aminoacyl-tRNA synthetase joins amino acids to their cognate trna. Briefly discuss the two reactions of aminoacylation.arrow_forwardThe antibacterial protein colicin E3 is an effective inhibitor of pro- tein synthesis in prokaryotes. This protein is a nuclease, specifically attacking a phosphodiester bond near the 3' end of the 16S RNA. Suggest a mechanism for the effect of colicin E3 on translation.arrow_forwardWhy is RNA polymerase a good name for this enzyme? Explain each part of the name: RNA, polymer and asearrow_forward
- The Shine-Dalgarno Sequence is used in bacteria eukaryotes botharrow_forwardThe ribosome can transfer any peptidyl group from the P-site tRNA to any aminoacyl group on the A-site RNA, but the rate may vary with the identities of those groups. Propose an explanation why the ribosome synthesizes poly-Pro sequences extremely slowly compared to other peptide sequences.arrow_forwardThe antibacterial protein colicin E3 is an effective inhibitor of protein synthesis in bacteria. This protein is a nuclease, specifically attacking a phos- phodiester bond near the 3' end of the 16S RNA. Suggest a mechanism for the effect of colicin E3 on translation.arrow_forward
- Briefly explain the importance of the protein factor EF-Ts in the translation process. Do not simply define the given.arrow_forwardExplain the significance of the following statement: The functioning of the aminoacyl-tRNA synthetases is referred to as the second genetic code.arrow_forwardbriefly explain the importance of the degeneracy of the genetic code in the translation process. do not simply define the givenarrow_forward
- Budding yeasts such as S. cerevisiae exhibit telomerase activity throughout their life cycles, whereas human somatic cells do not exhibit telomerase activity. Suggest why this is so.arrow_forwardExplain why RNase A cannot catalyze the hydrolysis of DNA.arrow_forwardTreating a solution of ribonuclease with 2-mercaptoethanol and urea denatures the enzyme. If the 2-mercaptoethanol is removed, followed by the removal of urea, the ability of the enzyme solution to hydrolyse RNA is reduced by about 99%. What is the most plausible explanation for this observation? a. All of the RNase molecules have about 1% of their usual activity, due to changes to the organisation of disulphide bonds b. Random formation of disulphide bonds mean about 1% of the RNase molecules are 100% active whereas 99% have no activity c. Deprotonation of histidine in the active site of the enzyme means that only about 1% of the enzyme molecules are active d. Deprotonation of histidine in the active site of the enzyme means that all of the enzyme molecules have 1% of their usual activityarrow_forward
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