Biology 12 Chapter 16 - Support and Movements - 19

Biology 12 Chapter 16 - Support and Movements - 19

1. A lighter stripe in the mid section of A band is called?
H-zone
M-line
A-zone
Z-zone

2. In H-zone, H stands for what?
Heel
Here
Heal
Hele

3. By which of the following line H-zone is bisected?
M-line
N-line
W-line
Z-line

4. The mid line of I band is called?
H-line
M-line
I-line
Z-line

5. Which is the smallest contractile unit of muscle fibre?
Sarcoplasm
Sarcoplasmic reticulum
Sarcomere
Sarcolemma

6. Myofilament is made up of ………….. and …………..filament?
Small, thick
Thick,thin
Long, thin
Thick, long

7. What is the diameter of thick filament?
10 nm
20 nm
12 nm
16 nm

8. What is the composition of thick filament?
Myosin
Polypeptides
Actin
Tropomyosin

9. The thickness of thin filaments are about?
7-8 nm
2-4 nm
1-3 nm
4-5 nm

10. Which of the following are link the thick and thin myofilaments together during contraction?
Cross bridges
Myosin bridges
None of these
Actin bridges

This is more feedback!

This is the feedback!