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.

821. Van neil hypothesis about the production of oxygen during phosynthesis was based on the study and investigations on___________?
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A. Protenema

B. Bacteria

C. Cyanobacteria

D. Algae

822. The percentage of light absorbed by the leaf is ___________?
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A. 10%

B. 1%

C. 20%

D. 15%

823. Co-ordination in man is brought about by___________?
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A. Nervous system

B. Endocrine system

C. Both of these

D. none of these.

824. Antheridiophore and archegoniophore are found in_____________?
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A. Marchantia

B. Funaria

C. Both of these

D. None of these

825. Bryophtes are called amphiabians of plant world because:
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A. All of these

B. Amphibians have close relation with bryophytes in their habitat.

C. Bryophytes like amphibian live in damp shady places and close to water body.

D. Bryophytes like amphibian ancestors are one of the most primitive organisms in this world.

826. Which of the following group of tracheophyta has expanded or scale like leaves which are alwaysed arranges in whorls?
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A. Sphenopsida

B. Psilopsida

C. Prteropsida

D. Lycopsida

827. Stomata cover only ______________ of leaf surface?
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A. 1-2 %

B. 10%

C. 50%

D. 0.03 0.04%

828. Which one of the following forms the blk of exoskeleton of an arthropod?
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A. Epicuticle

B. Ectocuticle

C. Procuticle

D. None of these

829. All of the following are similarities between nervous and endocrine system except:_____________?
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A. Homestatic in function

B. Release chemical messengers in extracellular space

C. Produce chemical messengers

D. Having slow but prolonged effects
830. Which of the following is used in brewing industry to promote malting_______________?
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A. Abscisic Acid

B. Auxins

C. Gibberellins

D. Cytokinins

831. The dichotomously branching system has shape similar to________________?
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A. R

B. Y

C. U

D. Fork

832. Complete breakdown of glucose molecule takes place in which of the following?
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A. Aerobic respiration

B. Lactic acid fermentation

C. Alcoholic fermentation

D. All of these

833. In which group of tracheophytes ovules are born on the exposed surface of megasporophylls______________?
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A. Spheospsida

B. Filicineae

C. Angiosperms

D. Gymnosperms
834. ____________ is simplest form of learning.
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A. Insight learning

B. Latent learning

C. Habituation

D. Imprinting

835. Which of the following statement is incorrect about Molluscans?
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A. They have hydrostatic skeleton.

B. They move by tube feet

C. Their shell grows as the animal grows.

D. They are surrounded by single or double pieces of hard skeleton.

836. Mosses are included in sub-division of ___________?
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A. Anthoceropsida

B. Hepaticopsida

C. Lycopsida

D. Bryopsida
837. ___________ respiration is directly involved in the production of energy, necessary for all living activities?
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A. Organismic

B. Cellular

C. Both of these

D. None of these

838. Which of the following has no central nervous system?
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A. Man

B. Hydra

C. Planaria

D. Cockroach

839. Which one of the following is avascular structure?
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A. A spongy bone.

B. Cartilage

C. All of these

D. A compact bone.

840. Light reaction takes place on/in____________?
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A. Chloroplast

B. Storma

C. Thylakoid

D. Grana
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