340323
Select the incorrect statement with respect to actin filament
1 When a muscle fibre contracts, Meromyosin blocks the active site of G-protein and prevents myosin head from binding to it
2 The actin filament has a spiral groove to accommodate tropomyosin
3 Troponin is a calcium binding protein which is attached to tropomyosin at regular intervals
4 G-actin has an active site for binding with the head of myosin molecule
Explanation:
In the resting state a subunit of troponin masks the active binding sites for myosin on the actin filaments.
BIOXI20: LOCOMOTION AND MOVEMENT
340324
Match the columns I and II. Column I Column II A ‘F’ actins P Run close to the ‘F’ actins throughout its length B Tropomyosin Q Masks the active binding sites C Troponin R ‘G’ actins
1 A–R, B–P, C–Q
2 A–Q, B–R, C–P
3 A–P , B–R, C–Q
4 A–Q, B–P, C–R
Explanation:
'F' actins - 'G' actin Tropomyosin - Run close to the 'F' actins throughout it's length Troponin - Masks the active binding sites.
BIOXI20: LOCOMOTION AND MOVEMENT
340325
Actin binding sites are not located on
1 Troponin
2 Tropomyosin
3 Meromyosin
4 Both (1) and (2)
Explanation:
Actin binding sites are located on meromyosin. Each meromyosin has two important parts, a globular head with a short arm and a tail, the globular head is an active ATPase enzyme and has binding sites for ATP and active sites for actin.
BIOXI20: LOCOMOTION AND MOVEMENT
340326
Each meromyosin has two important parts. They are
1 A short arm and a tail
2 A globular head and a tail
3 A globular head with a short arm and a tail
4 A globular head with a short arm
Explanation:
Each meromyosin has two important parts, a globular head with a short arm and a tail, the former being called the heavy meromyosin (HMM) and the latter, the light meromyosin (LMM).
340323
Select the incorrect statement with respect to actin filament
1 When a muscle fibre contracts, Meromyosin blocks the active site of G-protein and prevents myosin head from binding to it
2 The actin filament has a spiral groove to accommodate tropomyosin
3 Troponin is a calcium binding protein which is attached to tropomyosin at regular intervals
4 G-actin has an active site for binding with the head of myosin molecule
Explanation:
In the resting state a subunit of troponin masks the active binding sites for myosin on the actin filaments.
BIOXI20: LOCOMOTION AND MOVEMENT
340324
Match the columns I and II. Column I Column II A ‘F’ actins P Run close to the ‘F’ actins throughout its length B Tropomyosin Q Masks the active binding sites C Troponin R ‘G’ actins
1 A–R, B–P, C–Q
2 A–Q, B–R, C–P
3 A–P , B–R, C–Q
4 A–Q, B–P, C–R
Explanation:
'F' actins - 'G' actin Tropomyosin - Run close to the 'F' actins throughout it's length Troponin - Masks the active binding sites.
BIOXI20: LOCOMOTION AND MOVEMENT
340325
Actin binding sites are not located on
1 Troponin
2 Tropomyosin
3 Meromyosin
4 Both (1) and (2)
Explanation:
Actin binding sites are located on meromyosin. Each meromyosin has two important parts, a globular head with a short arm and a tail, the globular head is an active ATPase enzyme and has binding sites for ATP and active sites for actin.
BIOXI20: LOCOMOTION AND MOVEMENT
340326
Each meromyosin has two important parts. They are
1 A short arm and a tail
2 A globular head and a tail
3 A globular head with a short arm and a tail
4 A globular head with a short arm
Explanation:
Each meromyosin has two important parts, a globular head with a short arm and a tail, the former being called the heavy meromyosin (HMM) and the latter, the light meromyosin (LMM).
340323
Select the incorrect statement with respect to actin filament
1 When a muscle fibre contracts, Meromyosin blocks the active site of G-protein and prevents myosin head from binding to it
2 The actin filament has a spiral groove to accommodate tropomyosin
3 Troponin is a calcium binding protein which is attached to tropomyosin at regular intervals
4 G-actin has an active site for binding with the head of myosin molecule
Explanation:
In the resting state a subunit of troponin masks the active binding sites for myosin on the actin filaments.
BIOXI20: LOCOMOTION AND MOVEMENT
340324
Match the columns I and II. Column I Column II A ‘F’ actins P Run close to the ‘F’ actins throughout its length B Tropomyosin Q Masks the active binding sites C Troponin R ‘G’ actins
1 A–R, B–P, C–Q
2 A–Q, B–R, C–P
3 A–P , B–R, C–Q
4 A–Q, B–P, C–R
Explanation:
'F' actins - 'G' actin Tropomyosin - Run close to the 'F' actins throughout it's length Troponin - Masks the active binding sites.
BIOXI20: LOCOMOTION AND MOVEMENT
340325
Actin binding sites are not located on
1 Troponin
2 Tropomyosin
3 Meromyosin
4 Both (1) and (2)
Explanation:
Actin binding sites are located on meromyosin. Each meromyosin has two important parts, a globular head with a short arm and a tail, the globular head is an active ATPase enzyme and has binding sites for ATP and active sites for actin.
BIOXI20: LOCOMOTION AND MOVEMENT
340326
Each meromyosin has two important parts. They are
1 A short arm and a tail
2 A globular head and a tail
3 A globular head with a short arm and a tail
4 A globular head with a short arm
Explanation:
Each meromyosin has two important parts, a globular head with a short arm and a tail, the former being called the heavy meromyosin (HMM) and the latter, the light meromyosin (LMM).
340323
Select the incorrect statement with respect to actin filament
1 When a muscle fibre contracts, Meromyosin blocks the active site of G-protein and prevents myosin head from binding to it
2 The actin filament has a spiral groove to accommodate tropomyosin
3 Troponin is a calcium binding protein which is attached to tropomyosin at regular intervals
4 G-actin has an active site for binding with the head of myosin molecule
Explanation:
In the resting state a subunit of troponin masks the active binding sites for myosin on the actin filaments.
BIOXI20: LOCOMOTION AND MOVEMENT
340324
Match the columns I and II. Column I Column II A ‘F’ actins P Run close to the ‘F’ actins throughout its length B Tropomyosin Q Masks the active binding sites C Troponin R ‘G’ actins
1 A–R, B–P, C–Q
2 A–Q, B–R, C–P
3 A–P , B–R, C–Q
4 A–Q, B–P, C–R
Explanation:
'F' actins - 'G' actin Tropomyosin - Run close to the 'F' actins throughout it's length Troponin - Masks the active binding sites.
BIOXI20: LOCOMOTION AND MOVEMENT
340325
Actin binding sites are not located on
1 Troponin
2 Tropomyosin
3 Meromyosin
4 Both (1) and (2)
Explanation:
Actin binding sites are located on meromyosin. Each meromyosin has two important parts, a globular head with a short arm and a tail, the globular head is an active ATPase enzyme and has binding sites for ATP and active sites for actin.
BIOXI20: LOCOMOTION AND MOVEMENT
340326
Each meromyosin has two important parts. They are
1 A short arm and a tail
2 A globular head and a tail
3 A globular head with a short arm and a tail
4 A globular head with a short arm
Explanation:
Each meromyosin has two important parts, a globular head with a short arm and a tail, the former being called the heavy meromyosin (HMM) and the latter, the light meromyosin (LMM).
