Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 4, Problem 2TYK
Eukaryotic and prokaryotic ribosomes are similar in that:
a. both contain a small subunit, but only eukaryotes contain a large subunit.
b. both contain the same number of proteins.
c. both use mRNA to assemble amino acids into proteins.
d. both contain the same number of types of rRNA.
e. both produce proteins that can pass through pores into the nucleus.
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All of the following regarding ribosomes are true EXCEPT:
A. Ribosomes are comprised of protein and RNA.
B. Ribosomes coordinate with initiation and elongation factors to regulate translation.
C. Ribosomes bind transcripts in their promoters.
D. Prokaryotic ribosomes are comprised of a large and a small subunit.
E. Ribosomes in eukaryotic cells bind to complete transcripts.
Which of the following statements about the nucleolus is not true? a. The nucleolus is a membrane-bound structure. b. rRNA genes are transcribed in the nucleolus. c. Ribosomal subunits are synthesized in the nucleolus. d. rRNA molecules are chemically modified in the nucleolus.
Which of the following is the function of transfer RNA?
a.Makes up the structure of ribosomes
b.Stores genetic information
c.Carries the message that guides polypeptide assembly
d.Delivers amino acids to ribosomes
Chapter 4 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 4.1 - Prob. 1SBCh. 4.2 - Where in a prokaryotic cell is DNA found? How is...Ch. 4.3 - Where in a eukaryotic cell is DNA found? How is...Ch. 4.3 - Prob. 2SBCh. 4.3 - Explain the structure and function of the...Ch. 4.3 - Prob. 4SBCh. 4.3 - What is the structure and function of the...Ch. 4.4 - Prob. 1SBCh. 4.4 - Prob. 2SBCh. 4.5 - What are the structures and function of anchoring...
Ch. 4.5 - Prob. 2SBCh. 4 - A prokaryote converts food energy into the...Ch. 4 - Eukaryotic and prokaryotic ribosomes are similar...Ch. 4 - Which of the following structures does not require...Ch. 4 - Which of the following structures is not used in...Ch. 4 - Which of the following are glycoproteins whose...Ch. 4 - Prob. 6TYKCh. 4 - Which of the following statements about proteins...Ch. 4 - Which of the following is not a component of the...Ch. 4 - Discuss Concepts Explain why aliens invading Earth...Ch. 4 - You are examining a cell from a crime scene using...Ch. 4 - Prob. 11TYKCh. 4 - Prob. 12TYKCh. 4 - Prob. 13TYKCh. 4 - Prob. 14TYKCh. 4 - Prob. 15TYKCh. 4 - Prob. 16TYKCh. 4 - 17. The unicellular alga Chlamydomonas reinhardtii...Ch. 4 - Prob. 1ITD
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- 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 ribosomesarrow_forwardWhich of the following statements about the spliceosome is false? a. A spliceosome splices pre-mRNA molecules. b. A spliceosome removes exons from RNA molecules. c. A spliceosome is composed of snRNPs. d. A spliceosome recognizes the exon-intron boundaries and the branch site.arrow_forwardWhich of the following proteins would you expect to be translated by a ribosome associated with the rough endoplasmic reticulum? A. A potassium channel that localizes to the plasma membrane B. Pyruvate kinase (a protein involved in glycolysis) C. A component of RNA polymerase II (a.k.a. RNA Polymerase 2) D. A component of DNA polymerasearrow_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_forwardAll of the following will move from the inside of the nucleus to the cytoplasm through a nuclear pore EXCEPT: A. rRNA B. mature mRNA C. Small ribosome subunits D. Chromosomesarrow_forwardWhich of the following statements about ribosomes is correct? * a. the number of ribosomes in a cell seldom exceeds 50 b. the active site of a ribosome contains mostly protein molecules c. structurally, ribosomes have two rRNA- protein subinuts d. no correct response What is the complementary hnRNA base sequence produced from the DNA base sequence 5' C-T-A-T-A-C 3' ? * a. 3' C-T-A-G-A-T 5' b. 3' C-G-G-A-T-A 5' c. 3' G-A-U-A-U-G 5' d. 3' G-A-T-A-T-G 5' The product of the first phase in protein synthesis is * a. DNA molecules b. RNA molecules c. both RNA and DNA molecules d. neither RNA and DNA moleculesarrow_forward
- The anticodons are located in a.tRNA. b.rRNA. c.mRNA. d.ribosomes. e.endoplasmic reticulum.arrow_forwardThe ribosome is needed for translation of mRNA (a) because it has the enzyme that forms peptide bonds between amino acids (b) because the ribosomal RNA contains the codon which determine the sequence of amino acids in a protein (c) because it contains the enzyme that links the amino acids and tRNA (d) because it has enzyme that removes introns from mRNA (e) all of the abovearrow_forwardRibosomes are the structures that translate mRNA sequences into amino acid sequences (i.e., polypeptides or proteins). Ribosomes are composed of: A. rRNA B. protein C. both A and B D. none of the abovearrow_forward
- Researchers isolated a gene for a membrane protein and from that the amino acid sequence was determined. The researchers then were able to isolate the protein from the membrane. They then determined the molecular mass of the membrane protein and noticed that it was larger than the size predicated from the primary sequence determined from the gene. How can you explain this and how it happened in the cell?arrow_forwardWhich of these descriptions of rRNA is true? a.It is single-stranded. b.It catalyzes steps in protein synthesis. c.It forms part of the structure of both subunits of a ribosome. d.It is produced in the nucleolus. e.All of these are true.arrow_forwardTranslation occurs in the _, where the __ produce ___ from RNA. a. nucleus . . . ribosomes . . . proteins b. cytoplasm . . . chromosomes . . . proteins c. nucleus . . . genes . . . poteins d. cytoplasm . . . ribosomes . . . proteinsarrow_forward
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