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Locomotion and Movement Test - 25

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Locomotion and Movement Test - 25
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  • Question 1
    1 / -0
    Which of the following is not a biological function of skeleton?
    Solution
    • The human skeleton is the internal framework of the body.
    •  It is composed of around 270 bones at birth this total decreases to around 206 bones by adulthood after some bones get fused together. 
    • The skeleton serves six major functions: support, movement, protection, production of blood cells, storage of minerals and endocrine regulation. Hence, Excretion is not a biological function of the skeleton.
    So, the correct answer is 'Excretion'.
  • Question 2
    1 / -0

    Epicuticle in exoskeleton is made up of

    Solution
    • The exoskeleton of animals within the phylum Arthropoda mainly consists of a coating called the cuticle.
    •  On the exterior surface of the cuticle is a thin, waxy layer called the epicuticle. 
    • The epicuticle is formed of three layers; the inner layer is the cuticulin, which is made from lipoproteins. Hence, Epicuticle in exoskeleton is made up of Lipoprotein
      • So, the correct answer is 'Lipoprotein'.
  • Question 3
    1 / -0
    The smallest muscle in the human body is
    Solution
    Stapedius is a muscle on the wall of the tympanic cavity of the middle ear. It is the smallest skeletal muscle in the human body. It acts reflexively in response to loud sounds by reducing excessive vibrations that may injure the internal ear. 
    Thus, the correct answer is option B.
  • Question 4
    1 / -0

    The motion that gives tetrapod mammals the greatest speed is with

    Solution
    • Gait is the pattern of movement of the limbs of animals, including humans, during locomotion over a solid substrate.
    •  Most animals use a variety of gaits, selecting gait based on speed and energetic efficiency. 
    • Different animal species may use different gaits due to differences in anatomy that prevent the use of certain gaits. 
    • In a symmetrical gait, the left and right limbs of a pair alternate, while in an asymmetrical gait, the limbs move together. Asymmetrical gaits are sometimes termed "leaping gaits", due to the presence of a suspended phase. Hence, The motion that gives tetrapod mammals the greatest speed is with An asymmetrical gait.
    So, the correct answer is 'An asymmetrical gait'.
  • Question 5
    1 / -0
    The globular head of myosin contains
    Solution
    Myosin is a contractile protein which is involved in the activity of the muscles. It is an ATP-dependent protein which has several sites for attachment on its head. It attaches to actin with one of its attachment site and with ATPase enzyme on the globular head. The ATP hydrolysis to ADP and pi by the ATPase enzyme provides energy for the contraction of muscles.
    Thus, the correct answer is option C. 
  • Question 6
    1 / -0
    Epiphyseal plates at the extremities of long bones help in
    Solution
    • The epiphyseal plate is also known as a growth plate. It is the region of growing tissue near the ends of the long bones in children and adolescents. 
    • At least two epiphyseal plates are found at the end of each bone.
    • The endochondral ossification at the epiphyseal plates present at the extremities of long bones helps in the longitudinal growth of the long bones. So, the correct answer is option B.
  • Question 7
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    Label the correct parts of the Myosin monomer :

    Solution
    • Each actin (thin) filament is made of two filamentous actins helically wound to each other. Each ‘F’ actin is a polymer of monomeric ‘G’ (Globular) actins.
    • There are two important parts, a globular head  (here, labelled as A) with a short arm and a tail, the former being called the heavy meromyosin (HMM) and the latter, the light meromyosin (LMM).
    • The HMM component, i.e., the head and short arm projects outwards at a regular distance and angle from each other from the surface of a polymerised myosin filament and are known as the cross arm (here, labelled as B).
    • The globular head is an active ATPase enzyme and has binding sites for ATP  (here, labelled as D) and active sites for actin (here, labelled as C).
    Thus, the correct answer is option B.
  • Question 8
    1 / -0

    Locomotion is the characteristic feature of

    Solution
    • The movement of an organism from one place to another, often by the action of appendages such as flagella, limbs, or wings. 
    • In some animals, such as fish, locomotion results from a wavelike series of muscle contractions. 
    • Types of animal locomotion include walking, running, crawling, rolling, flying, climbing, swimming, skipping and jumping.
    •  Bacterial locomotion is of three types: Flagellar, Spirochaetal and Gliding movement. Hence, Locomotion is the characteristic feature of Animal and Microorganism.
     So, the correct answer is 'Both B and C'.
  • Question 9
    1 / -0
    Myosin filaments are localized in
    Solution
    • Each myofibril (muscle filament)has alternate dark and light bands on it. 
    • The light bands contain actin and are called I-band or Isotropic band, whereas the dark band called ‘A’ or Anisotropic band contains Myosin.
    • Myosin filaments are also called as Thick filaments.
    • Hence Myosin filaments are localized in A-Band.
    • So, the correct answer is 'A-Band'.
  • Question 10
    1 / -0
    In skeleton muscle Z-line is connected to.
    Solution
    • Each myofibril consists of a series of contractile units (sarcomeres) connected at a protein border (the Z line).
    •  Thin filaments(actin) of adjacent sarcomeres are present in the Z line between the thin filaments are thick filaments(myosin). 
    • The protein tropomyosin winds around the thin filaments and covers the myosin binding sites. Hence, In skeleton muscle, Z-line is connected to actin.
    So, the correct answer is 'actin'.
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