biology MCQs – Page 41

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 Review each marked answer and report any item that may be outdated or unclear.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
801. Chlorophyll is insoluble in_____________?
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A. Organic solvents

B. Alcohol

C. Water

D. Carbon tetrachloride

802. The place of attachment of leaf with the shoot is called__________?
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A. Petiole

B. Pit.

C. Pith.

D. Ecdysone

803. Under resting membrane potentials:
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A. Outer surface of neuron is more positive

B. Inner surface of neuron is more positive

C. Both of these surfaces are equally positive

D. none of these.

804. Among the followings which is the most longest supportive cell?
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A. Trachea

B. Tracheids

C. Sclereids

D. Collenchyma cells

805. In Anaerobic respiration only __________ % of the energy present within the chemical bond of glucose is converted into ATP?
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A. 4%

B. 2%

C. 3%

D. 1%

806. Maize is an example of_________________?
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A. Monocot

B. Dicot

C. Gymnosperms

D. none of these

807. If a cross section of a sarcomere is seen, each myosin is surrounded by how many actin molecules:
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A. 7

B. 6

C. 5

D. 9

808. The simplest of all bryophytes are___________?
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A. Liverworts

B. Embryophytes

C. Mosses

D. Thallophytes

809. Today the land habitat is dominated by__________________?
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A. Tracheophytes

B. Fungi

C. Gymnosperms

D. Angiosperms

810. Which one of the following is an example of a non-elastic connective tissue?
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A. Muscles.

B. None of these

C. Tendon

D. Ligaments.

811. The blood enters the ________________ side of heart ?
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A. All possible

B. Posterior

C. Lateral

D. Anterior

812. Of the following which one is not the characteristic of the plants included in psilopsida_____________?
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A. They have mycorrhizal association

B. Rhizoids bear Rhizome

C. Gametophyte is colourless

D. Aerial branches have veinless outgrowths

813. Gibberellins is an example of_________________?
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A. Growth inhibitor

B. Growth stimulator

C. None of these

D. Growth hormone

814. The arrangement of unequal dichotomous branches in one plane during evolution of leaves is called_____________?
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A. Fusion

B. Overtopping

C. Webbing

D. Planation
815. Which of the following pigment is Blue- green in colour?
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A. Chlorophyll a

B. Chlorophyll c

C. Chlorophyll d.

D. Chlorophyll b.

816. Which of the following statement about osteoporosis is incorrect.
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A. Bone eating process takes over bone formation process.

B. It results from estrogen deficiency.

C. It is common in old age.

D. There is reduction of bone mass and change in chemical composition of the matrix
817. Of the following, which one is better respiratory medium___________?
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A. Soil

B. None of these

C. Air

D. Water

818. It is one of the convulsive disorders of nerves which are characterized by abrupt transient symptoms of motor, sensory, psychic or autonomic nature________________?
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A. Alzheimers discease

B. Dementia

C. Epilepsy

D. Parkinsons disease

819. First Actions spectrum was obtained by using__________?
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A. Bacteria

B. Fungi

C. Algae

D. Spirogyra
820. Secondary cell wall of sclerenchyma cells is impregnated with_________________?
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A. Lignin.

B. Cellulose.

C. Pectin.

D. Peptidoglycan and murein.