Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 4, Problem 4MC
Summary Introduction
Introduction:
Ribosomes are small particle composed of ribosomal RNA combined with proteins and found in large number in the cytoplasm of a living cell. A ribosome has two subunits: the small ribosomal subunit and the large ribosomal subunit. Ribosomes are present in both prokaryotic cells and eukaryotic cells. Prokaryotes have 70S ribosomes, which containing small (30S) and large (50S) subunits. Whereas, eukaryotes have 80S ribosomes, which containing small (40S) and large (60S) subunits.
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Students have asked these similar questions
:The site of protein synthesis is
A. At ribosomes .
B. Always at a Golgi body.
C. At the nuclear membrane .
D. Near microfilaments .
Which structure is the the site of the synthesis of proteins that will be used inside the cell?
a. Golgi
B. Smooth ER
C. Rough ER
D. free ribosomes
The smooth endoplasmic reticulum is
a. involved in protein synthesis.
b. a site of protein glycosylation.
c. used to store a variety of ions.
d. the site of lipid and membrane synthesis.
Chapter 4 Solutions
Biology
Ch. 4.1 - trace the historical development of the cell...Ch. 4.1 - list the three principles of the cell theory?Ch. 4.2 - Prob. 1TCCh. 4.2 - Prob. 1CYLCh. 4.2 - Prob. 2CYLCh. 4.3 - Prob. 1CSCCh. 4.3 - describe the structure and features shared by all...Ch. 4.3 - distinguish prokaryotic from eukaryotic cells?Ch. 4.3 - Prob. 3CYLCh. 4.4 - describe the structure and function of the major...
Ch. 4.4 - Prob. 2CYLCh. 4.5 - Prob. 1CSCCh. 4.5 - Why do the chromosomes in chromatin condense in...Ch. 4.5 - Using Fig. E4 4. plot the changes in each country...Ch. 4.5 - Why is it advantageous for all cellular membranes...Ch. 4.5 - Why is it important for lysosomal enzymes to be...Ch. 4.5 - Over the years, scientists have wondered how many...Ch. 4.5 - What problems would arise if the trachea were...Ch. 4.5 - Prob. 1CYLCh. 4.5 - list the structures found in animal but not plant...Ch. 4.5 - describe the structure and function of each major...Ch. 4.5 - Prob. 1CTCh. 4 - Which of the following is/are found only in...Ch. 4 - Which of the following is not a function of the...Ch. 4 - Prob. 3MCCh. 4 - Prob. 4MCCh. 4 - Prob. 5MCCh. 4 - Prob. 1FIBCh. 4 - Prob. 2FIBCh. 4 - Prob. 3FIBCh. 4 - Prob. 4FIBCh. 4 - Prob. 5FIBCh. 4 - Two organelles that are believed to have evolved...Ch. 4 - Prob. 7FIBCh. 4 - Prob. 1RQCh. 4 - Prob. 2RQCh. 4 - Prob. 3RQCh. 4 - Describe the nucleus and the function of each of...Ch. 4 - Prob. 5RQCh. 4 - Prob. 6RQCh. 4 - Describe the structure and function of the...Ch. 4 - Prob. 8RQCh. 4 - Prob. 9RQCh. 4 - List the structures of bacterial cells that have...Ch. 4 - Prob. 1ACCh. 4 - Prob. 2ACCh. 4 - What problems would an enormous round cell...
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- The RNA components of ribosomes are synthesized in the _____. a. cytoplasm b. nucleus c. nucleolus d. endoplasmic reticulumarrow_forwardWhich of the following statements is correct? a. Ribosomes are only found in bacteria and archaea. b. Some animal cells are prokaryotic c. Only eukaryotic cells have mitochondria d. The plasma membrane is the outermost boundary of all cells. e. Some cell membranes do not consists of lipids.arrow_forwardWhat controls the passage of molecules into and out of the nucleus? a. endoplasmic reticulum, an extension of the nucleus b. nuclear pores, which consists of membrane proteins c. nucleoli, in which ribosome subunits are made d. dynamically assembled microtubules e. tight junctionsarrow_forward
- Where in the cell does translation occur? A. Ribosomes in the nucleus B. Ribosomes on the endoplamic reticulum C. Ribosomes free-floating in the cytosol D. both A and B E. both B and Carrow_forwardWhere in the cell is an N-linked glycan added onto a protein? A.In the nucleus. B.In the cytoplasm.C.The the lumen of the ER.D.In the lumen of the cis-Golgi.E.On the extracellular side of the plasma membrane.arrow_forwardA protein is synthesized on a ribosome within the rough endoplasmic reticulum. If the protein needs to be modified and packaged before export from the cell, to which structure is it sent? a. endosome b. Golgi body c. nucleus d. lysosome e. smooth endoplasmic reticulumarrow_forward
- The organelle that combines proteins with carbohydrates and packages them within vesicles for secretion is A.the Golgi complex. B.the rough endoplasmic reticulum. C.the smooth endoplasmic reticulum. D.the ribosome.arrow_forwardWhich of the following is not a function of cytoskeleton in a cell ? A) Maintenance of cell shape and structure B) Intracellular transport C) Cell motility D) Support of the organellearrow_forwardWhere in the cell do disulfide bonds form on a protein? A.In the nucleus. B.In the lumen of the cis-Golgi.C.The the lumen of the ER.D.On the extracellular side of the plasma membrane. E.In the cytoplasm.arrow_forward
- Which of the following is not a function of the smooth endoplasmic reticulum? Group of answer choices a.Provides a site for ribosome attachment b.Supplies membrane for use throughout the cell c.Makes steroid hormones d.Makes glycoproteinsarrow_forwardWhich is true of ribosomes found in eukaryotic cells? They: A) contain DNA B) synthesize carbohydrates C) are attached to the Rough Endoplasmic reticulum (RER) and carry out the synthesis of proteins D) are found inside the endoplasmic reticulum E) are originally found associated with the endoplasmic reticulum in prokaryotic cells.arrow_forwardThis organelle is composed of extensive amounts of membrane. It synthesizes lipids and detoxifies harmful substances such as alcohol. This organelle is a. the smooth endoplasmic reticulum. b. a mitochondrion. c. a proteasome. d. a lysosome.arrow_forward
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