biology Mcqs
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

861. Which of the following ions are involved in the initiation of nerve impulse_______________?
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A. Fe

B. K+

C. none of these

D. Na+
862. Which of the following animal has a hydrostatic skeleton?
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A. Round worm

B. Pin worm

C. Tape worm

D. Earthworm
863. Which of the following plays the major role in providing support to young herbaceous parts of the plant?
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A. Living cells of epidermis with higher turgor pressure.

B. Collenchyma cells

C. Living cells of cortex and pith with higher turgor pressure.

D. All of these
864. Thylakoids in chloroplasts are stacked into___________?
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A. None of these

B. Nucleus

C. Stroma

D. Grana
865. Pinus Taxus and Picea belong to_________________?
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A. Spheospsida

B. Angiosperms

C. Gymnosperms

D. Filicineae

866. Which of the following cells are involved in soft callus formation?
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A. Onteocyte and osteoblast

B. Osteoclast and osteocyte

C. Fibroblast and osteoblast.

D. Osteoblast and osteoclast.

867. In all plants the major sites of phosynthesis are___________?
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A. Branches

B. Roots

C. Stems

D. Leaves respire and utilize O2 and release CO2.
868. In bryophytes fertilization takes place in___________?
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A. Antheridia

B. water

C. Ovule

D. Archegonia
869. At the induction of action potential opening of Na+ gate with influx of Na+ is a ___________ processes?
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A. Passive transport

B. Diffusion

C. Active transport

D. none of these

870. Sporangia of which of the following tracheopytes develop singly on the upper side of sporophylls which may or may not be arranged to form strobili_____________?
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A. Psilopsida

B. Sphenopsida

C. Prteropsida

D. Lycopsida
871. Gaseous exchange through the skin is known as ______________ respiration?
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A. Cutaneous

B. Cuticular

C. Pulmonary

D. Skin

872. Of the following which one is not an energy releasing process?
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A. Respiration

B. Photosynthesis

C. Krebs cycle

D. Glycolysis

873. Abscisic acid promotes flowering in short day plants and inhibits in long day plants, which of the following is antagonistic to abscisic acid in terms of flowering______________?
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A. Cytokinins

B. Gibberellins

C. Auxins

D. Ethene.

874. Which of the following plant group first formed true leaves________________?
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A. Sphenopsida

B. Pteropsida

C. Psilopsida

D. Lycopsida
875. Which of the following bone is not present in the hind-limb?
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A. Fibula

B. Tibia

C. Femur

D. Radius
876. A smallest contractile unit of muscle contraction called sarcomere is the area between two:
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A. A band

B. Z- Line

C. M- Line

D. H- zone

877. Of the following, which one is a contagious disease?
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A. Asthma

B. Emphysema

C. Lungs cancer

D. Tuberculosis
878. Types of behaviour enabling pillbugs to reach moist area is___________?
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A. Instinct

B. Kinesis

C. Learning

D. Taxes

879. Molecular formula of chlorophyll a molecule is___________?
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A. C55H72O5N4Mg

B. C55H70O6N4Mg

C. C50H72O6N4Mg

D. C55H70O5N4Mg

880. A joint formed between humerus, radius and ulna is an example of__________?
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A. Fibrous joint

B. Slightly movable joint.

C. Freely movable joint.

D. Immovable joint.

881. Cellular respiration is essentially a/an _____________ process?
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A. None of the above.

B. Reduction.

C. Oxidation.

D. Redox.

882. Which of the following transmits nerve impulse from receptors to central nervous system?
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A. Motor neuron

B. Associative neuron

C. Sensory neuron

D. none of these.

883. How many vertebrae are present in vertebral column of man?
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A. 33 vertebrae

B. 33 pairs of vertebrae

C. 25 vertebrae

D. 31 vertebrae

884. Glycolysis takes place in____________?
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A. Nucleus

B. Ribosomes

C. Cytosol

D. Mitochondria.

885. Value of resting membrane potential is_____________?
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A. 0.05 V

B. 0.07 V

C. 0.09V

D. 0.03 V

886. Which of the following statement about the head of a chlorophyll molecule is incorrect?
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A. It is a porphyrin ring or tetrapyrrole ring structure

B. It is flat, square and light absorbing

C. It is hydrophobic

D. Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen.

887. Quantitative study of energy relationships in biological systems obeys.
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A. Bioenergetics

B. Laws of thermodynamics

C. Laws of thermo chemistry

D. Laws of chemical energetic

888. Of the following four options which one is most advanced?
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A. Hepaticopsida

B. Anthoceropsida

C. None of these

D. Bryopsida

889. The contraction of which of the following muscle fibers, is controlled by hormones?
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A. All of these

B. A skeletal muscle.

C. A cardiac muscle

D. A smooth muscle
890. Which of the following acts as thermoregulator?
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A. Cerebrum

B. Thalamus

C. Cerebellum

D. Hypothalamus
891. Cell membrane under resting conditions is impermeable to all the ions except_____________?
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A. Na+

B. Cl-

C. K+

D. PO4-2

892. Intelligence is under the control of____________?
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A. Cerebrum

B. Cerebellum

C. Thalamus

D. Hypothalamus

893. Gibberellins may be substituted for ___________ light, therefore promote flowering in long day plants?
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A. White

B. Green

C. Blue

D. Red
894. Which of the following tracheophytes are leafless?
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A. Sphenopsida

B. Prteropsida

C. Lycopsida

D. Psilopsida
895. Water is _________ times viscous than air?
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A. 50

B. 1000

C. 5000

D. 8000

896. Rapid movement of leaves of mimosa on touching is an example of _____________?
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A. Nastic movement

B. Growth movement

C. Tropic movements.

D. Turgor movement
897. Vascular Cambium initially appears as actively dividing cells between_________________?
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A. Primary xylem and primary phloem

B. Primary xylem and secondary phloem.

C. Primary Xylem and secondary xylem.

D. Secondary xylem and secondary phloem.

898. Which of the following statement about alternation of generation in bryophytes is incorrect?
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A. It involves alternation of morphologically different generations

B. Their gametophyte is independent while sporophyte depends upon gametophyte for nutrition.

C. Both the gametophyte and sporophytes are haploid generations thus can produce haploids gametes to continue the diploid number on fertilization

D. Spore formation occurs through meiosis

899. Normal action potential of a neuronal cell is ___________?
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A. plus 80 mv

B. plus 70 mv

C. plus 50 mv

D. plus 60 mv

900. The dense fluid filled region in the chloroplast is____________?
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A. None of these

B. Grana

C. Stroma

D. Thylakoid