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. Actin
- B. Myosin
- C. Troponin
- D. Sarcomere
Explanation: Calcium binds to troponin C, causing the conformational shift in tropomyosin that reveals myosin-binding sites on actin.
Correct answer: Troponin- 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 muscles- A. Tendon
- B. Ligament
- C. Reticular tissue
- D. Cartilage
Explanation: Option (a) is correct. Tendons are fibrous connective tissues that attach muscles to bones.
Correct answer: Tendon- A. 2
- B. 4
- C. 6
- D. 8
Explanation: In a muscle sarcomere, each myosin filament (thick filament) is surrounded by 6 actin filaments (thin filaments) at each end.
Correct answer: 6- A. 12
- B. 14
- C. 16
- D. 18Preparing For College Admissions Tests
Explanation: Humans have 12 pairs of ribs, and the upper 7 pairs attach directly to the sternum, so the number of true ribs is 7 pairs x 2 ribs per…
Correct answer: 14- A. 33
- B. 20
- C. 15
- D. 32Health
Explanation: Children have 20 primary teeth, arranged as 10 in the upper jaw and 10 in the lower jaw.
Correct answer: 20- A. Fibrous Joints
- B. Cartilaginous Joints
- C. Synovial Joints
- D. None of these
Explanation: Option A is correct since fibrous joints are connected by dense, tough connective tissue that is rich in collagen fibers.
Correct answer: Fibrous Joints- A. They are multinucleated
- B. They are 1-1 nm in diameter and surrounded by sarcolemma
- C. They contain O2 storing molecules called myoglobin
- D. Their cytoplasm contains a high concentration of carbohydrates
Explanation: Skeletal muscle fibres are not 1-1 nm in diameter. They are 10-100 micrometers in diameter and are surrounded by sarcolemma.
Correct answer: They are 1-1 nm in diameter and surrounded by sarcolemma- A. Appear darker than smooth muscles by naked eye
- B. Alternating dark and light bands appear on their surface when visualized by naked eye
- C. Alternating dark and light bands appear on their surface when visualized via a microscope
- D. All of these
Explanation: The striated appearance of skeletal muscle tissue is a result of repeating bands of the proteins actin and myosin that are present along…
Correct answer: Alternating dark and light bands appear on their surface when visualized via a microscope- A. H zone
- B. M line
- C. Z line
- D. Z zone
Explanation: The sarcomere is the fundamental unit of contraction and is defined as the region between two Z-lines.
Correct answer: Z line611. If a cross section of a sarcomere is seen, each myosin is surrounded by how many actin molecules?
- A. 5
- B. 6
- C. 7
- D. 8
Explanation: The myosin filament is surrounded by six actin filaments and each actin filament is in turn surrounded by three myosin filaments.
Correct answer: 6- A. Primary Xylem and Seconday Xylem
- B. Primary xylem and Secondary phloem
- C. Secondary xylem and Secondary phloem
- D. Primary xylem and Primary phloem
Explanation: The correct option is D "Primary xylem and primary phloem". The "primary xylem and phloem" are conducting and supporting vascular tissues…
Correct answer: Primary xylem and Primary phloem- A. Higher turgor pressure
- B. Cortex and pith with higher turgor pressure
- C. Collenchyma cells
- D. All of these
Explanation: Option A: A Higher turgor pressure: The pressure exerted by the fluid inside plant cells against the cell wall, providing support to young…
Correct answer: All of these- A. Cellulose
- B. Lignin
- C. Murein
- D. Pectin
Explanation: Sclerenchyma cells have thick secondary cell walls usually impregnated with lignin, an organic substance that makes the walls tough and…
Correct answer: Lignin- A. A band becomes short
- B. I band elongates
- C. There is no change in sarcomere
- D. Z lines gets closer
Explanation: Option D is correct since the sarcomere shortens during muscle contraction. A sarcomere is a structure bound by two consecutive Z lines.
Correct answer: Z lines gets closer- A. Silica
- B. Polyester threads
- C. Groups of cell fibers
- D. Calcium and Phosphorus
Explanation: Option C is correct since muscles are composed of 'muscle fibers' which are further composed of 'myofibrils' which are composed of…
Correct answer: Groups of cell fibers- A. Synovial joint
- B. Fibrous joint
- C. Cartilaginous joint
- D. None of these joint None of these
Explanation: The root of the tooth and the socket of the mandible and the maxilla is an example of fibrous joint.
Correct answer: Fibrous joint- A. Four bones
- B. Six bones
- C. Eight bones
- D. Ten bones
- E. Many bones
Explanation: Your wrist is made up of eight small bones called carpal bones while your forearm contains two long bones;radius and ulna
Correct answer: Eight bones- A. Troponin
- B. Tropomyosin
- C. Myosin
- D. Actinin
Explanation: Myosin is a contractile protein that interacts with actin to bring about contraction of muscle or cell movement.
Correct answer: Myosin- A. Tropomyosin
- B. Tubulin
- C. Myosin
- D. All of these
Explanation: Myosin is a contractile protein of muscle. Primary myofilaments are made up of this protein.
Correct answer: Myosin