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Locomotion and Movement

Multiple Choice Questions

51.

One animal that does not perform locomotion is

Sycon
Nereis
Sepia
Euglena

52.

During strenuous excercise, glucose is converted into

glycogen
pyruvic acid
starch
lactic acid

53.

Which of the following is a transparent tissue?

Tendon
Fibrous cartilage
Hyaline cartilage
All of these

54.

In rabbit, end of a long bone is connected in another by

tendon
ligaments
muscle
cartilage

55.

Which of the following is important for muscle contraction and nerve impulse transmission?

Ca²⁺ ions
Mg²⁺ ions
Both (a) and (b)
Fe²⁺ ions

56.
Spindle fibre is made up of

tubulin

humulin

intermediate filament

flagelin

tubulin

Tubulin is a cytoskeletal globular protein that polymerizes to form microtubules. These radiate from each end of the cell to form a basket like arrangement which helps in the movement of chromosomes to poles. Microtubules also play an important role in the movement of cilia and flagella.

Intermediate filaments are tough rope- like bundles or protein (keratin, desmin, peripherin, vimentin). They provide mechanical stability to cells and interact with microfilaments and microtubules to form cytoskeleton.