Free Support and Movement MCQs with Answers
738 Support and Movement MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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- A. H zone
- B. M line
- C. Z line
- D. I band
Explanation: The A band does not shorten, it remains the same length, but A bands of different sarcomeres move closer together during contraction…
Correct answer: M line- A. ATP is hydrolyzed
- B. Calcium binds to myosin heads
- C. Both A and B
- D. None of these
Explanation: Calcium binds to troponin to remove tropomyosin from the binding site. It doesn't attach directly with "myosin".
Correct answer: Calcium binds to myosin heads- A. Binding sites of actin get attached to the myosin head
- B. Troponin uncovers the actin binding sites
- C. Ca2+ goes back inside sarcoplasmic reticulum
- D. Tropomyosin gets removed from the binding sites of actin filaments
Explanation: Soon after the binding of Calcium ions, "tropomyosin gets removed from the binding sites of actin filaments".
Correct answer: Tropomyosin gets removed from the binding sites of actin filaments- A. Articular capsule
- B. Articular cartilage
- C. Synovial fluid
- D. Fibrocartilage
Explanation: Fibrocartilage is the tough, very strong tissue found predominantly in the intervertebral disks and at the insertions of ligaments and…
Correct answer: Fibrocartilage- A. Positive phototropism and negative geotropism
- B. Negative tactic movement and positive tropic movement
- C. Positive geotropism of stem and roots
- D. Negative phototropism and positive geotropism
Explanation: The roots of a plant show positive geotropism and negative phototropism because they grow towards the Earth (in response to gravity) and…
Correct answer: Negative phototropism and positive geotropism- A. Muscle relaxation
- B. Muscle contraction
- C. Muscle twitch
- D. None of these
Explanation: The process of muscle contraction takes place when the myosin (thick) filament attaches to the actin (thin) filament and slides past each…
Correct answer: Muscle contraction- A. Flexor muscles
- B. Extensor muscles
- C. Adductor muscles
- D. Abductor muscles
Explanation: The adductors as a group are responsible for bringing the legs inwards towards each other (adduction) when the leg is extended and…
Correct answer: Adductor muscles308. What are osteocytes?
- A. White blood cells
- B. Bone cell
- C. Brain cell
- D. None of these
Explanation: Option A: White blood cells: Cells involved in the immune system's defense against infections and foreign substances.
Correct answer: Bone cell- A. Hyperglycemia
- B. Hypercalcaemia
- C. Hypoglycemia
- D. Hypocalcaemia
Explanation: Option A: Hyperglycemia refers to high levels of glucose (sugar) in the blood.
Correct answer: Hypocalcaemia- A. Tropomyosin
- B. Tubulin
- C. Actin
- D. Myosin
Explanation: Option A: Tropomyosin is another protein associated with muscle contraction, but it primarily functions to regulate the interaction…
Correct answer: Myosin- A. Striped muscles
- B. Striated muscles
- C. Involuntary muscles
- D. Both A and B are correct
Explanation: Skeletal striated muscles, also known as striated or voluntary muscles, are a type of muscle tissue that is responsible for the movement…
Correct answer: Both A and B are correct- A. Radio-ulnar joints
- B. Tibiofibular joints
- C. Both A and B
- D. Sutures
Explanation: Syndesmoses are fibrous joints where two bones are connected by a ligament.
Correct answer: Both A and B- A. Actin
- B. Myosin
- C. Myofibril
- D. Fibroin
Explanation: The answer is Myosin. Myosin is a protein that is essential for muscle contraction.
Correct answer: Myosin- A. Troponin binds to myosin and tropomyosin binds to actin
- B. Tropomyosin binds to actin and prevents the myosin head from binding to actin
- C. Both options A and B are correct
- D. None of these options are correct
Explanation: Option A: Troponin does not bind to myosin thus this option is incorrect.Option B: In a relaxed muscle fibre, the binding sites for myosin…
Correct answer: Tropomyosin binds to actin and prevents the myosin head from binding to actin- A. H line
- B. Z line
- C. M line
- D. I line
Explanation: M line is a line at center of sarcomere to which myosin bind.OPTION A: H-band is the zone of thick filament having no actin.
Correct answer: M line- A. Osteocytes
- B. Osteoclasts
- C. Chondrocytes
- D. Osteoblasts
Explanation: Cartillages cells are calles chondrocytes.OPTION A: Osteocytes is cell that lies within the substance of fully formed bone.OPTION B…
Correct answer: Chondrocytes- A. Tibia
- B. Fibula
- C. Tarsals
- D. Femur
Explanation: The hip joint is the junction where the hip joins the leg to the trunk of the body.
Correct answer: Femur- A. T-tubule
- B. Sarcolemma
- C. Sarcomere
- D. Sarcoplasmic reticulum
Explanation: Calcium diffusing in the cytoplasm between myosin and actin filaments of the muscle fibrils causes the filaments to slide into each other…
Correct answer: Sarcoplasmic reticulum- A. Voluntary
- B. Involuntary
- C. Both Options A and B are correct
- D. None of these options is correct
Explanation: Skeletal muscles comprise 30 to 40% of your total body mass. They're the muscles that connect to your bones and allow you to perform…
Correct answer: Voluntary- A. ATP
- B. ADP
- C. Calcium
- D. Sodium
Explanation: During muscle contraction, the calcium gates of the smooth endoplasmic reticulum open releasing calcium into the cytosol.
Correct answer: Calcium