Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 18, Problem 11TYK
Summary Introduction
Introduction: The cell maintains the concentration of particular proteins by various degradation mechanisms. The degradation of proteins or proteolysis is a major process that helps to regulate various cell functions, such as removal of misfolded proteins, DNA repair, and helps in cell division.
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Which of these is NOT true of nucleosomes?
A. Some post-translational modifications to histone proteins serve as binding sites for transcription factors.
B. The position of nucleosomes is fixed on the genome and can not be changed.
C. The position and post-translational modifications of histones can be inherited through mitosis.
D. The binding between DNA and histone proteins can be disrupted by post-translational modifications.
Which of the following is the function of transfer RNA?
A. Carries the message that guides polypeptide assembly
B. Stores genetic information
C. Makes up the structure of ribosomes
D. Delivers amino acids to ribosomes
In detail, describe how a protein is processed that is going to end up as a lysosomal enzyme. Start with the Ribosome and mRNA and end with the lysosome.
Chapter 18 Solutions
Study Guide for Campbell Biology
Ch. 18 - In the following diagram of the lac operon, an...Ch. 18 - a. Repressible enzymes usually function in _____...Ch. 18 - a. Give an example of highly methylated and...Ch. 18 - Label the components of the following diagram that...Ch. 18 - a. How is the process of alternate RNA splicing...Ch. 18 - a. Describe how miRNAs regulate gene expression....Ch. 18 - a. What is the difference between determination...Ch. 18 - What type of evidence established that Bicoid...Ch. 18 - a. List three genetic changes that can convert a...Ch. 18 - Complete the following concept map to help you...
Ch. 18 - Fill in the following table to help you organize...Ch. 18 - Prob. 3SYKCh. 18 - Prob. 1TYKCh. 18 - Prob. 2TYKCh. 18 - Prob. 3TYKCh. 18 - Prob. 4TYKCh. 18 - Prob. 5TYKCh. 18 - DNA methylation of cytosine bases a. initiates the...Ch. 18 - Which of the following is not true of enhancers?...Ch. 18 - Prob. 8TYKCh. 18 - A eukaryotic gene typically has all of the...Ch. 18 - Prob. 10TYKCh. 18 - Prob. 11TYKCh. 18 - Which of the following statements explains why a...Ch. 18 - Prob. 13TYKCh. 18 - Prob. 14TYKCh. 18 - Prob. 15TYKCh. 18 - Prob. 16TYKCh. 18 - What would be the fate of a Drosophila larva that...Ch. 18 - Prob. 18TYKCh. 18 - Prob. 19TYKCh. 18 - Prob. 20TYKCh. 18 - Prob. 21TYKCh. 18 - Prob. 22TYKCh. 18 - Prob. 23TYKCh. 18 - Which of the following would most likely account...
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- Which 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_forwardThe role of p53 in normal cells is toa. create cancer-blocking mutations.b. trigger unrestrained cell division.c. detect damaged DNA.d. splice exons together in the correct sequence.arrow_forwardTo facilitate movement of mRNA from the nucleus into the cytoplasm, what is added to the 3’ end of mRNA? a) Ribosomes b)Transcription factors c) A cap of modified nucleotides d) Modified tRNA molecules e) A Poly-a-tailarrow_forward
- What is a proteome? a. The collection of all genes encoding proteins b. The collection of all proteins encoded by the genome c. The collection of all proteins present in a cell d. The amino acid sequence of a proteinarrow_forwardWhat is the role of ribosomes in protein synthesis? * A. they carry proteins to the site of action B. they provide a source of amino acids C. they provide a site from tRNAs to link to mRNAs D. they translate the basic DNA code using tRNA Consider the following DNA bases sequence 3' TAT CGG 5'. what dipeptide is formed if a DNA point mutation converts CGG to CGT? * A. Val-Ala B. Asp-Glu C. Ala- Ala D. Gly-Ala A tRNA molecule possesses the anticodon 5' CGU 3' , which amino acid will this tRNA molecule carry? * A. Threonine B. Valine C. Alanine D. Arginine What will most likely be the effect of the change in the DNA molecule? * A. the change will cause a harmful mutation B. the DNA molecule will be unable to replicate…arrow_forwardOnce translated into proteins: (a) How many nucleotides are there? (b) How many codons are there? (c) How many amino acids?arrow_forward
- Which of the following is true of ribosome rescue? (C & E wrong) A. The process produces a protein that is tagged for degradation. B. Proteases enter the A-site of the ribosome to degrade the C-terminus of the synthesized peptide. C. A partially translated mRNA becomes fully degraded before it can be translated further. D. No protein is produced in the process. E. Stalled ribosomes are released in the absence of a stop codon.arrow_forwardNumber the following steps of protein synthesis in the order in which they occur, starting with 1 and ending with 9.a. _____ The stop codon is reached, and the polypeptide is released.b. _____ The small ribosomal subunit finds the start codon, and the large ribosomal subunit joins.c. _____ The end of the gene is reached, and the pre-mRNA is released and then edited.d. _____ The transcription factor binds the promoter.e. _____ The protein is folded and modified to become functional.f. _____ RNA polymerase builds the mRNA transcript.g. _____ mRNA and initiator tRNA bind the small ribosomal subunit.h. _____ New tRNA molecules are brought into the A site successively, and the peptide chain of the tRNA in the P site is joined to the amino acid of the tRNA in the A site.i. _____ mRNA exits the nucleus via a nuclear pore.arrow_forwardA release factor is referred to as a “molecular mimic” because its structure is similar to a. a ribosome. b. an mRNA. c. a tRNA. d. an elongation factor.arrow_forward
- Which of the following best describes tRNA? a. Provides the instructions for the amino acid sequence of a polypeptide b. Complexes with ribosomal proteins to form ribosomes c. Used for eukaryotic RNA processing d. Transports amino acids to ribosomes during translationarrow_forwardAfter ingesting a bacteria, macrophages process bacterial parts and ‘present’ them to acquired immunity cells so the acquired immune cells recognize these invaders again in the future. The antigen-presenting proteins ultimately end up in the plasma membrane. Where did it receive the post-translation modification that determined its final location? a. The ribosome b. The ER c. The Golgi d. The vesiclearrow_forwardMuscle cells differ from nerve cells mainly because they(A) express different genes.(B) contain different genes.(C) use different genetic codes.(D) have unique ribosomes.arrow_forward
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