Biology MCQs

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Legume nodules possess special protein called LEGHEMOGLOBIN. The synthesis of leghemoglobin is the result of symbiosis because neither bacteria alone nor legume plant alone possess the protein

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In the human body, there are a total of 12 pairs of ribs. Out of these, the first 7 pairs are referred to as “true ribs.” True ribs are so named because they are directly connected to the sternum (breastbone) through their own costal cartilages. Each true rib consists of a bony portion that connects to the spine and a cartilaginous portion that attaches to the sternum.

These true ribs play a crucial role in protecting the internal organs within the thoracic cavity, including the heart and lungs. The remaining 5 pairs of ribs are known as “false ribs” – they are either indirectly connected to the sternum or not connected at all. False ribs are attached to each other through cartilage or are floating freely, not attaching to the sternum directly.

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Adult human stem cells, unlike embryonic stem cells, are found in adult tissues. Among the major sources, bone marrow is often used to procure these cells. They have the property to self-renew and differentiate into numerous types of specialized cells. Stem cells obtained from the bone marrow can form different cells including blood cells and cells that contribute to the immune system.

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Blood Pressure is expressed in two numbers. The higher number is known as Systolic Pressure, or the amount of force (as measured in millimetres of mercury) that is exerted against the artery walls during a heartbeat (contraction). The lower number in the Diastolic pressure, which does the force exist while the heart is resting between beats.

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Schizophrenia is an example of mental illness. It is a serious mental disorder in which people interpret reality in an abnormal manner. It can result into hallucinations, delusions, and extremely disordered thinking and behavior that impairs daily functioning, and can be disabling.

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Basin Groups refers to 9 subdivisions of the lunar Pre-Nectarian geologic period. It is the second era of the Hadean. In Basin Era began the Self-replicating RNA molecules on Earth.

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An endoscopy is used in medicine to look for the ulcers in the stomach. The endoscopy procedure uses an endoscope to examine the interior of a hollow organ or cavity of the body. Unlike many other medical imaging techniques, endoscopes are inserted directly into the organ.

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Type O negative blood group is considered as the universal blood type. People with type O  blood group are called universal donors because type O negative blood is compatible to any blood recipient’s type.

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Carbohydrates are the ready source fo energy for the athletes. Carbohydrates improve athletic performance by delaying fatigue and allowing an athlete to compete at higher levels longer   nutrients such as fat or muscle protein are utilized to make energy.

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The clavicle or collarbone is a long bone that serves as a strut between the shoulder blade and the sternum or breastbone. There are two clavicles, one on the left and one on the right. The clavicle is the only long bone in the body that lies horizontally.
The patella, also known as the kneecap, is a flat, circular-triangular bone which articulates with the femur (thigh bone) and covers and protects the anterior articular surface of the knee joint.
The scapula, or shoulder blade, is a large triangular-shaped bone that lies in the upper back.
The sternum or breastbone is a long flat bone located in the central part of the chest. It connects to the ribs via cartilage and forms the front of the rib cage, thus helping to protect the heart, lungs, and major blood vessels from injury.