Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Textbook Question
Chapter 27, Problem 1TY
Which of the following features is common to prokaryotic cells?
- a. a nucleus, featuring a nuclear envelope with pores
- b. mitochondria
- c. plasma membranes
- d. mitotic spindle
- e. none of the above
Expert Solution & Answer
Summary Introduction
Introduction: Prokaryotic cells are primitive and most abundant types of cells present on the Earth. They differ in many features from the advanced eukaryotic cells found on the surface of the Earth.
Answer to Problem 1TY
Correct answer: Plasma membranes are the structures that are common to prokaryotic cells. Hence, the correct answer is option c.
Explanation of Solution
Reason for correct answer:
All type of cells possesses plasma or cell membranes. These membranes are made up of lipids and act as a protective barrier between the internal and external environment of the cell. So, plasma membranes are present in prokaryotic cells.
Option c. is given as “plasma membranes”.
The structure or feature that is common to prokaryotic cells is plasma membrane. Hence, the correct answer is option c.
Reasons for incorrect answer:
Option a. is given as, “a nucleus, featuring a nuclear envelope with pores”.
The prokaryotic cells do not possess a well-defined membrane bound nuclei, but it encompasses a nucleoid. Hence, option a. is incorrect.
Option b. is given as, “mitochondria”.
Mitochondria act as powerhouse for the eukaryotic cells. Prokaryotic cells do not contain mitochondria. Hence, option b. is incorrect.
Option d. is given as, “mitotic spindle”.
Mitotic spindles are collective web of fibers that are present in eukaryotic cells. These fibers are used during division of chromosomes. These structures are not present in the prokaryotic cells. Hence, option d. is incorrect.
Option e. is given as, “none of the above”.
Plasma membrane is common to prokaryotic cells and the correct option is answer c. Hence, option e. is incorrect.
Hence, the options a., b., d., and e. are incorrect.
Conclusion
The prokaryotic cells possess plasma membranes made up of lipids and proteins.
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כ
FIRST BASE OF CODON
O
THIRD BASE OF CODON
SCAGUCAGUGAGUCAG
UUU
UUC
UCU
UAU
UGU
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(F)
Tyrosine (Y)
Cysteine (C)
UCC
UAC
UGC
Serine (S)
UUA
UUG
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UAA
UGA
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-Stop codon
UAG
UGG -Tryptophan (W)
CUU
CUC
CCU
CAU
CGU
Histidine (H)
CCC
CAC
CGC
-Leucine (L)
Proline (P)
CUA
CCA
CAA
CUG
CCG
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-Arginine (R)
CGA
CGG
AUU
ACU
AAU
AGU
AUC
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AAC
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AUA
ACA
AAA
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ACG
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AGA
AGG
GUU
GCU
GAU
GUC
GUA
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GCC
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GCA
GCG
GAC
GAA
GAG
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Chapter 27 Solutions
Biology
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Ch. 27 - Place the following steps in the correct order,...Ch. 27 - What ecological role do cyanobacteria play? a....Ch. 27 - Prob. 6TYCh. 27 - Prob. 7TYCh. 27 - Prob. 8TYCh. 27 - Prob. 9TYCh. 27 - Prob. 10TYCh. 27 - Prob. 1CQCh. 27 - Prob. 2CQCh. 27 - Prob. 3CQCh. 27 - Prob. 1COQCh. 27 - Prob. 2COQ
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