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Ch. 4 - Introduction to Eukaryotic Cells
Norman-McKay- Microbiology: Basic and Clinical Principles 2nd Edition
Norman-McKay2nd EditionMicrobiology: Basic and Clinical PrinciplesISBN: 9780137661619당신이 사용하는 게 아니라요?교과서 변경
2장, 문제 13

Eukaryotic flagella differ from prokaryotic flagella in that:
a. Eukaryotic flagella use a rotary motion to propel the cell.
b. Eukaryotic flagella are made of proteins.
c. Eukaryotic flagella are not enclosed in a membrane.
d. Eukaryotic flagella have a 9 +2 arrangement of microtubules.

검증된 단계별 안내
1
Step 1: Understand the structural differences between eukaryotic and prokaryotic flagella. Eukaryotic flagella are complex organelles enclosed by the cell membrane, while prokaryotic flagella are simpler and not membrane-bound.
Step 2: Recall the motion mechanism. Prokaryotic flagella rotate like a propeller to move the cell, whereas eukaryotic flagella move with a whip-like or undulating motion.
Step 3: Consider the composition. Both types of flagella are made of proteins, but the specific proteins differ. Eukaryotic flagella are primarily composed of microtubules arranged in a characteristic pattern.
Step 4: Focus on the microtubule arrangement in eukaryotic flagella. They have a '9 + 2' arrangement, meaning nine pairs of microtubules form a ring around two central microtubules.
Step 5: Use this information to evaluate each option: (a) relates to motion type, (b) relates to composition, (c) relates to membrane presence, and (d) relates to microtubule structure. Identify which statement correctly describes eukaryotic flagella.

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주요 개념

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Structure of Eukaryotic Flagella

Eukaryotic flagella are complex organelles composed of microtubules arranged in a characteristic 9 + 2 pattern, meaning nine pairs of microtubules surround two central microtubules. This structure is enclosed by the cell membrane and is essential for their whip-like motion.
추천 영상:
가이드 코스
02:36
Eukaryotic Cilia & Flagella

Structure of Prokaryotic Flagella

Prokaryotic flagella are simpler, made primarily of the protein flagellin, and lack microtubules. They are not enclosed by the cell membrane and function through a rotary motor mechanism embedded in the cell envelope, enabling a spinning motion to propel the cell.
추천 영상:
가이드 코스
02:53
Prokaryotic Flagellar Structure

Mechanism of Flagellar Movement

Eukaryotic flagella move by bending in a whip-like fashion powered by dynein motor proteins sliding microtubules against each other. In contrast, prokaryotic flagella rotate like a propeller, driven by a rotary motor using proton motive force, resulting in different modes of cell propulsion.
추천 영상:
가이드 코스
02:43
Prokaryotic Flagellar Movement