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#movement

3 public questions tagged with this topic.

ZOOLOGY

Which of the following movements is an example of adduction?

Adduction is the movement toward the midline of the body​. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Zoology section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Zoology portion (Latest NCERT Textbooks for Academic Session 2026-27 - Rationalized Edition for Class XI and XII), Topic: Structural organization, ph

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Cytoskeleton

Which component of dynein is primarily responsible for generating movement?

Generation of force in dynein occurs in motor domain comprising six AAA+ modules organized in a closed ring with large linker arching over it. AAA1 through AAA4 can bind nucleotide, but only AAA1 and AAA3 hydrolyze productively to drive movement. In ATP-bound state AAA1-AAA2 closure pulls AAA2 away from AAA3, propagating conformational change through AAA4-AAA6 to stalk coiled-coil, shifting registry and lowering affinity for microtubule. Subsequent phosphate release closes ring further, driving linker domain rotation of approximately eight nanometers from straight to bent conformation docked a

Ref: Carter Nature 2011; AAA+ ring AAA1 hydrolyzes ATP driving linker swing, motor core force.

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