Tag: locomotion and movement

Questions Related to locomotion and movement

Actin is present in thin filament.

zoology locomotion and movement contractile protein structure of muscle muscles and their structure

  1. True

  2. False

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Correct Option: A
Explanation:

Actin is the thin filaments of the muscles. They are a polymer of G-actin monomers arranged in chains and two such chains are wound in a helix. So, the given statement is true.

The monomeric actin is called as

zoology locomotion and movement contractile protein structure of muscle muscles and their structure

  1. F- actin

  2. M- actin

  3. G- actin

  4. N- actin

Show answer
Correct Option: C
Explanation:

Actin is the thin filament of the muscles. It is a polymer made of many monomers. The monomers of actin are globular in shape and hence called Globular-actin or G-actin. Monomers together form straight chains of polymer action. The polymer action is called F-actin.

So the correct option is C.

In a muscle fibre

zoology locomotion and movement contractile protein structure of muscle muscles and their structure

  1. Sacrolemma is connective tissue holding the myofibrils together

  2. T system contains calcium storage sacs

  3. Both filaments have cross-bridges

  4. All of the above

Show answer
Correct Option: B
Explanation:
Terminal cisternae are enlarged areas of the sarcoplasmic reticulum surrounding the transverse tubule because terminal cisternae ensure rapid calcium delivery, they are well developed in muscles that contract quickly such as fast-twitch skeletal muscle.
So, the T system contains calcium storage sacs.

Choose the correct answer from the alternatives given.
The enormous diversity of protein molecules is mostly due to the diversity of:

zoology locomotion and movement contractile protein structure of muscle muscles and their structure

  1. Amino groups on the amino acids

  2. K groups on the amino acids

  3. R groups on the amino acids

  4. Peptide bonds

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Correct Option: C
Explanation:

There are 20 amino acids known. All the amino acids follow the basic structure. It consists of a carbon atom in the middle surrounded by three chemical bases.

Two out of three bases are the amino (NH$ _2$ group) and the carboxylic group (COOH). The third group is a simple hydrogen atom present in all the amino acids.
The fourth group is called an R group that determines the nature of the amino acid. This R group can be as simple as a hydrogen atom and may also contain complex rings. On the basis of the R group, the amino acid can be polar or non-polar, acidic or basic or neutral.
Thus the enormous diversity of protein molecules is mostly due to the diversity in the R group.
So, the correct option is 'R groups on the amino acids'.

State whether the following statements are true or false.
Actin is present in thin filament.

zoology locomotion and movement contractile protein structure of muscle muscles and their structure

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Skeletal muscle is composed of muscle fibres which have smaller units called myofibrils. There are three types of proteins make up each myofibril; they are contractile, regulatory and structural proteins. By contractile proteins, we mean actin (thin filament) and myosin (thick filament).

So, the correct option is 'True'.

The supportive structure of our pinna is also found in _______________.

biology locomotion and movement gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. Tip of nose

  2. Ear ossicles

  3. Vertebrae

  4. Nails

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Correct Option: A
Explanation:

  • The kind of tissue that forms the supportive structure in our pinna (external ears) is also found in tip of the nose. 
  • As External pinna is made up of elastic cartilage. 
  • It is passage towards middle ear. Hence, The supportive structure of our pinna is also found in the tip of the nose.
So, the correct answer is 'tip of nose'.

Number of bones of face is

biology locomotion and movement gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. 12

  2. 30

  3. 40

  4. 14

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Correct Option: D
Explanation:
The number of bones in face is 14. They are as inferior nasal concha (2), Lacrimal bones (2), Mandible (1), Maxilla (2), Nasal bones (2), Palatine bones (2), Vomer (1), Zygomatic bones (2).
So, the correct answer is '14'.

Identify the joints, which are freely movable.

zoology locomotion and movement basics of joints joints and type of joints skeleton, joints and muscles

  1. Fibrous joints

  2. Symphyses

  3. Synovial joints

  4. Cartilaginous joints

Show answer
Correct Option: C
Explanation:

A synovial joint is a connection between two bones consisting of a cartilage lined cavity filled with fluid. Synovial joints are capable of the greatest movement. Knees, elbows and shoulders are examples of synovial joints. Since they allow for free movement, synovial joints are classified as diarthrosis. They allow for many types of movement including gliding, angular, rotational etc. So, the correct answer is 'Synovial joints'.