biology MCQs – Page 36

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs
701. Notochord is present throughout life in___________?
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A. Vertebrates

B. Chordates

C. Cephalochordates

D. Urochordates

702. In which of the following pigments major energy reserves and cell wall are like plants?
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A. Rhodophyta

B. Chrysophyta

C. Phaeophyta

D. Chlorophyta
703. In acoelomates gut is ________ in origin.
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A. Mesodermal

B. Ectodermal

C. Endodermal

D. None of these

704. Example of bacteria requiring low concentration of oxygen is__________?
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A. spirocheta

B. Pseudomonas

C. E-coli

D. Campylobactor
705. Mastication is carried out by__________?
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A. Smooth muscles

B. Teeth

C. All of these

D. Tongue

706. The organs of locomotion in annelids are__________?
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A. Setae</strong>

B. Parapodia

C. Hydrostatic skeleton

D. Muscles

707. In some cases the blastomere can produce complete embryo the cleavage will be___________?
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A. Spiral and indeterminate

B. Spiral and determinate

C. Radial and determinate

D. Radial and indeterminate
708. In which of the following component of the body, lactic acid fermentation takes place?
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A. Liver

B. Brain

C. Heart

D. Muscles
709. Rigor mortis i.e, stiffening of body after death results from__________?
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A. Death of tissue due to unavailability of O2.

B. Decrease in body temperature after death.

C. Accunulation of rigid proteins molecules in sarcoplam.

D. Unavailability of ATP, which is necessary to break the link between actin and myosin.
710. Which of the following statements is incorrect about skeletal muscle fibers?
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A. They are 10 100 ?m in diameter & surrounded by sarcolemma

B. They contain O2 storing molecules called hemoglobin.

C. They are multinucleated.

D. Their cytoplasm contains high concentration of carbohydrates

711. Haemoglobin can be almost completely oxygenated by an oxygen pressure of __________ of mercury.
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A. 100 mm

B. 10 cm

C. 10 mm

D. 60 mm

712. Co-ordination results in_____________?
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A. Organization of body functions

B. Integration of body functions

C. Regulation of body functions

D. All of these
713. In which of the following joint muscles are arranged in the same plane as that of joint?
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A. Between humerus and scapula

B. Between femur and tibia.

C. Between ulna and scapula

D. Between radius and ulna.

714. Lungs are spongy due to the presence of million of___________?
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A. Parabronchi

B. Bronchioles

C. Air sacs

D. Alveoli
715. In most birds air sacs are ____________ in number?
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A. 4

B. 10

C. 3

D. 9
716. Why skeletal muscles are called striated muscles?
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A. Alternating dark and light bands appear on their surface when visualized by naked eye.

B. They appear darker than smooth muscles by naked eye.

C. All of these

D. Alternating dark and light bands appear on their surface when visualized via a microscope.
717. C6H12O6 + 6O2 ? 6CO2 + 6H20 + ENERGY represents:____________?
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A. Aerobic respiration

B. Anaerobic respiration

C. Photosynthesis

D. Respiration

718. Arterial blood contains _________ of CO2 per 100 ml of blood
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A. 54 ml

B. 64 ml

C. 50 ml

D. 60 ml

719. Oxygen contents per liter of air is____________?
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A. 100ml

B. 10 ml

C. 200 ml

D. 100 ml

720. The maximum amount of oxygen which normal human blood absorbs and carries at sea level is ________ per 100 ml of blood.
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A. 20 ml

B. 40 ml

C. 10 ml

D. 30 ml