Home
Class 11
BIOLOGY
In the regions of A-band, the numbers of...

In the regions of A-band, the numbers of thick filaments surrounding a thin filament are 

A

3

B

6

C

12

D

9

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the number of thick filaments surrounding a thin filament in the A-band, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Structure of Muscle Filaments**: - In muscle tissue, there are two primary types of filaments: thick filaments (composed of myosin) and thin filaments (composed of actin). 2. **Identify the A-band**: - The A-band is the region of the sarcomere where thick and thin filaments overlap. This is crucial for muscle contraction. 3. **Determine the Arrangement of Filaments**: - Each thick filament is surrounded by thin filaments. Specifically, each thick filament is surrounded by **six thin filaments**. 4. **Analyze the Thin Filament's Surroundings**: - Conversely, each thin filament is surrounded by **three thick filaments**. This is important to establish the relationship between the two types of filaments. 5. **Conclude the Number of Thick Filaments Surrounding a Thin Filament**: - Since each thin filament is surrounded by three thick filaments, we conclude that the number of thick filaments surrounding a thin filament in the A-band is **3**. 6. **Select the Correct Answer**: - Based on the options provided (9, 12, 6, and 3), the correct answer is **3**. ### Final Answer: The number of thick filaments surrounding a thin filament in the A-band is **3**. ---
Promotional Banner

Topper's Solved these Questions

  • STRUCTURAL ORGANISATION IN ANIMALS

    AAKASH SERIES|Exercise EXERCISE-II (NEURAL TISSUE)|4 Videos

  • STRUCTURAL ORGANISATION IN ANIMALS

    AAKASH SERIES|Exercise EXERCISE-II (ORGAN AND ORGAN SYSTEM)|4 Videos

  • STRUCTURAL ORGANISATION IN ANIMALS

    AAKASH SERIES|Exercise EXERCISE-II (CONNECTIVE TISSUE)|19 Videos

  • STRATEGIES FOR ENHENCEMENT IN FOOD PRODUCTION

    AAKASH SERIES|Exercise EXERCISE-III|68 Videos

  • THE LIVING WORLD

    AAKASH SERIES|Exercise EXERCISE-III (Previous AIPMT/NEET Questions) |12 Videos

Similar Questions

Explore conceptually related problems

Ulothrix filaments produce

Ulothrix filaments produce

The number of thick myofilaments (myosin) surrounding Single thin myofilament (actin) are

The number of thick myofilaments (myosin ) surrounding single thin myofilament ( actin) are

Which protein is present in thick flament and thin filament ?

Actin is present in thin filament

In the region of A-band of a myofibril of a skeletal muscle where thick and thin filaments overlap. each thick filament is surrounded by

Read the following statements and select the correct option : I. In the skeletal muscles fibre, large number of myofilaments are arranged in the sarcoplasm. II. The central part of an anisotropic band where the only thick , filament is present and thin filament is absent is called 'A' band. III. In the resting state , a tropomyosin protein masks the active b binding sites for myosin on the active filaments . IV. The junction between a motor neuron and the sarcolemma of the muscle fibres is called motor-end plate.

Actin is present in thin filaments.

Assertion : Contraction of a muscle fibre takes place by the sliding of the thin filaments over the thick filaments. Reason : The central part of thick filament is not overlapped by thin filaments in a resting state.