Biology — Mixed Practice — Part 5: 40 MCQs with Explanations

Aerating openings formed in the bark through which exchange of gases takes place and water is lost in the form of vapours are Lenticels .

Lenticels look like Cars or small protusions .

The flow of lymph is maintained by All of these .

Arteries is the correct answer to “Which of the following have thickest walls”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

QRS complex represents Ventricular systole .

Osmotic potential is the measure of the change in water potential of a system due to the presence of solute molecules.

The diffusion of ions along with water also takes place by mass flow system along the Apoplast path.

Active transport is dependent on Respiration .

S-band locomotion is characteristically seen in Cartilaginous fish. .

The site/s where most of the uptake of water and minerals take place is/are Root hairs .

Reptiles is the correct answer to “Among the following organisms which shows the best adaptations for locomotion”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

5 is the correct answer to “How many vertebrae are in sacrum”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Unguligrade is the correct answer to “Which of the following is the swiftest form of the locomotion”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Tetany is caused by Hypocalcemia .

Tendon is the correct answer to “Which one of the following is an example of a non-elastic connective tissue”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Cartilage is the correct answer to “Which one of the following is avascular structure”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Insertion of Biceps is on Radius .

Amphibians is the correct answer to “Which of the following vertebrates have a fish-like body”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

All of these is the correct answer to “Which of the following statement about fatigue is correct”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Rigor mortis i.e, stiffening of body after death results from Unavailability of ATP, which is necessary to break the link between actin and myosin. .

It contains joints, for the same purpose as present in human skeletal system is the correct answer to “Which of the following statement about an arthropod exoskeleton is incorrect”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Ecdysone is A hormone that regulates moulting in arthropods .

Mesoderm. is the correct answer to “Endoskeleton is secreted by”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Earthworm is the correct answer to “Which of the following animal has a hydrostatic skeleton”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Diameter of thick filament is 16nm .

The most important function of troponin is All of these .

They move by tube feet is the correct answer to “Which of the following statement is incorrect about Molluscans”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

6 is the correct answer to “If a cross section of a sarcomere is seen, each myosin is surrounded by how many actin molecules:”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Procuticle is the correct answer to “Which one of the following forms the blk of exoskeleton of an arthropod”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Exoskeleton of a marine snail is composed of CaCO3 .

Epinasty is controlled by Auxins .

Gibberellins is an example of Growth stimulator .

Due to good blood supply it results in quick healing. is the correct answer to “Which of the following statements about fractures in old age is incorrect”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

A fracture hematoma has Dead cells .

Bony callus formation completes in 2-3 months. .

Rapid movement of leaves of mimosa on touching is an example of Turgor movement .

Rickets. is the correct answer to “Which of the follwing is a childhood disease resulting from nutritive Ca2+ deficiency”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

There is reduction of bone mass and change in chemical composition of the matrix is the correct answer to “Which of the following statement about osteoporosis is incorrect.”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Ligaments. is the correct answer to “Fibrous capsule surrounding synovial joints may be thickened at some places to form:”. Items of this type are drawn from the Biology — Mixed Practice — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

A joint formed between humerus, radius and ulna is an example of Freely movable joint. .