Biology
751. Chemically auxins are _________ ?
a. Indole propionic acid
b. Indole carboxylic acid
c. Indole acetaldehyde
d. Indole acetic acid
752. Gibberellins may be substituted for _________ light, therefore promote flowering in long day plants?
a. White
b. Red
c. Blue
d. Green
753. Which of the following is antagonist to Auxin in terms of promotion of stem growth ________ ?
a. Gibberellins
b. Cytokinins
c. Abscisic Acid
d. None of these
754. 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 _________ ?
a. Gibberellins
b. Cytokinins
c. Auxins
d. Ethene
755. The only promoter of leaf senescence in the following plant hormones is _________ ?
a. Gibberellins
b. Cytokinins
c. Auxins
d. Abscisic Acid
756. Which of the following is used in brewing industry to promote malting _________ ?
a. Gibberellins
b. Cytokinins
c. Auxins
d. Abscisic Acid
757. Which type of the receptors are present in the ear __________ ?
a. Chemoreceptors
b. Mechanoreceptors
c. Photoreceptors
d. Thermoreceptors
758. Type of sensations carried by nociceptors are _________ ?
a. Touch
b. Temperature
c. Pressure
d. Pain
759. Which type of sensory structures carrying the touch sensations are present in papillae extending into ridges of the fingertips _________ ?
a. Hair end organs
b. Meissner's Corpuscles
c. Pacinian corpuscles
d. None of these
760. Which type of sensory structures carry deep pressure and vibration sensations _________ ?
a. Hair end organs
b. Meissner's Corpuscles
c. Pacinian corpuscles
d. None of these
761. __________ is simplest form of learning.
a. Imprinting
b. Habituation
c. Insight learning
d. Latent learning
762. __________ was first to propose on objective definition of instinct.
a. Thorpe
b. Darwin
c. Pavlov
d. Kohler
763. Types of behaviour enabling pillbugs to reach moist area is __________ ?
a. Kinesis
b. Taxes
c. Instinct
d. Learning
764. Nissl's granules are present in which part of the neuron _________ ?
a. Axoplasm
b. Myelin sheath
c. Dendrite
d. Soma
765. All of the following are similarities between nervous and endocrine system except: _________ ?
a. Produce chemical messengers
b. Release chemical messengers in extracellular space
c. Homostatic in function
d. Having slow but prolonged effects
766. Which of the following statement about neuron is incorrect _________ ?
a. They not only conduct impulses but also generate them
b. They are not the only cellular component of nervous system
c. They may show limited regenerative capabilities
d. Like all the living cell, when they mature and divide to form similar cells
767. Secretin is hormone produced by _________ ?
a. Stomach
b. Liver
c. Pancreas
d. Duodenum
768. Type of neurons found exclusively in CNS are __________ ?
a. Sensory neurons
b. Motor neurons
c. Associative neurons
d. None of these
769. Maintenance of normal resting potential via movement of K+ inside the cell and Na+ out is a/an __________ process?
a. Active
b. Passive
c. Diffusional
d. None of these
770. Cell membrane under resting conditions is impermeable to all the ions except __________ ?
a. Na+
b. K+
c. Cl-
d. PO4-2
771. Grave's disease is produced due to _________ ?
a. Under-secretion of thyroxin
b. Overproduction of thyroxin
c. Under-secretion of corticosteroids
d. Overproduction of corticosteroids
772. MSH is produced from __________ ?
a. Anterior pituitary
b. Median pituitary
c. Posterior pituitary
d. None of these
773. At the induction of action potential opening of Na+ gate with influx of Na+ is a _________ processes?
a. Active transport
b. Passive transport
c. Diffusion
d. None of these
774. Acromegaly is caused due to over-secretion of __________ ?
a. STH
b. TSH
c. ACTH
d. Thyroxin
775. Insulin and glucagons are __________ in nature.
a. Protein
b. Amino acid derivative
c. Polypeptide
d. Steroid
776. Normal resting membrane potential of a neuron is __________ ?
a. - 50 mv
b. - 60 mv
c. -70 mv
d. - 80 mv
777. Insufficient secretion of iodo thyroxine in adults causes _________ ?
a. Myxedema
b. Cretinism
c. Goiter
d. Exophthalmic goiter
778. Normal action potential of a neuronal cell is __________ ?
a. plus 50 mv
b. plus 60 mv
c. plus 70 mv
d. plus 80 mv
779. Number of pairs of cranial nerves is __________ ?
a. 10
b. 11
c. 12
d. 13
780. Na+ -K+ ATPase pump is important for _________ ?
a. Maintenance of resting potential
b. Massive out flux of K+ after depolarization
c. Recovery of resting potential
d. Conversion of resting potential into action potential
781. Which of the following has no central nervous system _________ ?
a. Hydra
b. Man
c. Planaria
d. Cockroach
782. Maximum speed of nerve impulse transmission is __________ ?
a. 100 m/sec
b. 110 m/sec
c. 120 m/sec
d. 130 m/sec
783. Which of the following are responsible for the detection of changes in environment?
a. Receptors
b. Neurons
c. Effectors
d. All of these
784. Any change in the environment of an organism is called __________ ?
a. Stimulus
b. Variation
c. Response
d. Reaction
785. Co-ordination results in _________ ?
a. Regulation of body functions
b. Organization of body functions
c. Integration of body functions
d. All of these
786. Which of the followings are effectors _________ ?
a. Muscles
b. Glands
c. Sensory organs
d. Both 'a' & 'b'
787. Hydra has _________ ?
a. Brain
b. Nerves
c. Neuron-cells
d. All of these
788. Co-ordination in man is brought about by _________ ?
a. Nervous system
b. Endocrine system
c. Both of these
d. None of these
789. Which of the followings is missing from the nervous system of Planaria _________ ?
a. Ganglia
b. Longitudinal nerves
c. Lateral nerves
d. None of these
790. Which of the following transmits nerve impulse from receptors to central nervous system?
a. Sensory neuron
b. Motor neuron
c. Associative neuron
d. None of these
791. In which of the following neurons length of dendrite is greater than axon _________ ?
a. Sensory neuron
b. Motor neuron
c. Associative neuron
d. None of these
792. Which of the following neuron has a single long dendron?
a. Sensory neuron
b. Motor neuron
c. Associative neuron
d. None of these
793. Which of the following cytoplasmic extensions carry the message toward the cell body _________ ?
a. Dendrites
b. Axon
c. Both of these
d. None of these
794. Microscopic gaps between the neuron endings are called _________ ?
a. Transmitters
b. Synapses
c. Pores
d. Nodes
795. What is the function of synapse _________ ?
a. To allow nerve impulse to move in backward direction
b. To decrease the speed of nerve impulse
c. To stop the nerve impulse
d. To provide cytoplasmic connection between neurons
796. Under resting membrane potentials:
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
797. Which of the following ions are involved in the initiation of nerve impulse _________ ?
a. Na+
b. K+
c. Fe
d. None of these
798. Central nervous system of man consists of _________ ?
a. Brain
b. Spinal cord
c. Both of these
d. None of these
799. Reflex actions below the neck are under control of _________ ?
a. Brain
b. Spinal cord
c. Hypothalamus
d. None of these
800. Which of the following is present inside the vertebral column _________ ?
a. Brain
b. Spinal cord
c. Both of these
d. None of these
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