biology MCQs – Page 43

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 Review each marked answer and report any item that may be outdated or unclear.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
841. Which of the following bones bones are present in the plam of hand?
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A. Phalanges

B. Carpals

C. Metatarsals

D. Metacarpals
842. Which of the following statement about dicots is incorrect _________________?
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A. They have 4 or 5 sepals and petals or their multiple.

B. They have parallel vein pattern on their leaves

C. They are both herbaceous and woody

D. Vascular bundles are ring shaped in their stems.

843. ____________ was first to propose an objective definition of instinct.
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A. Darwin

B. Kohler

C. Pavlov

D. Thorpe

844. ATP are consumed during___________?
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A. none of these

B. Krebs cycle

C. Light dependent phase

D. Glycolysis
845. Type of neurons found exclusively in CNS are_____________?
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A. None of these

B. Motor neurons

C. Sensory neurons

D. Associative neurons
846. Insufficient secretion of iodothyroxine in adults causes____________?
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A. Myxedema

B. Cretinism

C. Exopthalmic goiter

D. Goiter

847. Endoskeleton is secreted by?
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A. All of these

B. Ectoderm.

C. Mesoderm.

D. Endoderm.

848. Equistem is an example of___________?
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A. Sphenopsida

B. Lycopsida

C. Prteropsida

D. Psilopsida

849. About __________ % of photosynthesis is carried by terrestrial plants, while rest occurs in ocean, lakes, and ponds?
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A. 20%

B. 30%

C. 10%

D. 40%

850. The most important function of troponin is___________?
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A. To bind with tropomyosin.

B. All of these

C. To bind with Ca2+ ions.

D. To bind with actin

851. ___________ respiration is the process by which cell utilized oxygen and produces CO2 ?
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A. Cellular

B. Organismic

C. Both of these

D. None of these

852. Which of the following animals has a respiratory system with one way flow of the air through the lungs, and the air is renewed after inspiration?
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A. Aves

B. Earthworm

C. Frogs

D. Cockroach

853. Photosynthesis is process in which ________ compounds of carbon (CO2) and hydrogen (H2O) are reduced to carbohydrate like (glucose) using light energy.
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A. Energy poor

B. Organic

C. Reduced

D. Energy rich

854. Receptors for hearing come under heading of___________?
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A. Nociceptors

B. Chemical

C. Photo

D. Mechanical
855. The first cell of the sporophyte generation is______________?
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A. Oospore

B. Gamete

C. Spore

D. Spore mother cell

856. Chlorophylls are found embedded in the __________ membranes?
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A. Intergrana

B. Grana

C. Stroma

D. Thylakoid
857. Sporophyte is____________?
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A. Haploid

B. Monoploid

C. Diploid

D. Polyploidy

858. Air contains __________ % of CO2 ?
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A. 0.03-0.04

B. 0.02-0.03

C. 0.04-0.05

D. 0.05-0.06

859. Deficiency of ___________ causes yellowing in plants?
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A. Magnesium

B. Iron

C. Oxygen

D. Chlorine

860. Final acceptor of electrons in respiratory chain is____________?
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A. Oxygen

B. Cytochrome a3

C. Water

D. NADH