MDCAT Biology Online Test With Answers

MDCAT Biology Online Test

Sr. # Questions Answers Choice
1 Animals devoid of respiratory, excretory and circulatory organs are Tapeworms Sponges Earthworm Live fluke
2 The pore by which the water leaves the body of sponges is called Ostia Osculum Spicules Medreporite
3 The cells absent in sponges are Chondrocytes Pinacocytes Choanocytes Archeocytes
4 The only phylum included in Grade Radiata is: Porifera Aschelminthes Platyhelminthes Cnidaria
5 In earthworm, the surface responsible for the gaseous exchange is Skin Gills Body surface Trachea
6 Which one of the following phylum is the example of coelomates Flatworms<span style="white-space:pre"> </span> Round worms Segmented worms Unsegmented worms
7 Features of most complex animals are Triploblastic with true coelom Triploblastic with pseudocoelom Triploblastic with bilateral symmetry Triploblastic with radial symmetry
8 Which of the following is not triploblastic Cnidaria Arthropoda Platyhelminthes Aschelminthes
9 Which one of following structures is formed from mesoderm? Intestinal lining Muscles Skin Brain
10 It is not a germ layer Ectoderm Endoderm Blastoderm Mesoderm
11 The body of a Hydra can be divided in two equal halves vertically in One plane only Two planes Three planes Any plane
12 Protostomes and deuterostomes do not differ in Type of cleavage Origin of mouth and anus Number of germ layers Mode of coelom formation
13 An organism of the lineage of animals in which the blastopore of the developing embryo becomes the anus, while a second opening becomes the mouth called: Triploblastic Protostome Diploblastic Deuterostome
14 In deuterostomes mesoderm is derived from wall of developing Coelom Heart Archenteron Blastopore
15 Sharp rise in LH output due to estrogens is an example of Negative feedback Positive feedback Primary feedback None
16 Decrease in progesterone level in blood stimulates the secretion of Estrogen FSH Cortisol Oxytocin
17 Which of the following hormone affects the supply of testosterone LH GH FSH Aldosterone
18 Hormones secreted by follicles in female Estrogen Progesterone FSH Both a and b
19 Deficiency of sex hormones in adults results in Sexual immaturity Mortality UTI sterility
20 It acts on smooth muscles Insulin Glucagon Cortisol Oxytocin
21 Osteoporosis is caused by lack of ADH Melanin Estrogen STH
22 High calcium concentration in blood causes the stimulation of Parathormone Calcitonin T<sub>3</sub> T<sub>4</sub>
23 Puffiness of hands is the character of Graves disease Addinsons disease Myxedema<span style="white-space:pre"> </span> Cretinism
24 Which hormone require 2nd messenger Insulin Estrogen Progesterone Testosterone
25 Which of the following is correct about insulin Inhibit glycogen hydrolysis Increase protein synthesis Increase glycolysis All
26 It brings about an increase in blood glucose level mainly by its production from glycogen Insulin Glucagon Cortisol Aldosterone
27 Which is not the function of glucagon Glycogen hydrolysis Lipolysis Gluconeogenesis Protein synthesis
28 It has duality in its functioning Pituitary gland Pancreas Gonads Gut
29 A hormone which regulates glucose and minerals Aldosterone Cortisol Insulin Corticosterone
30 In rats whose adrenal medulla has been removed surgically, the ability to with stand any stress situation such as cold Is Enhanced Is diminished Remains unaffected Is finished
31 Diabetes insipidus is caused by Lack of aldosterone Overproduction of ADH Lack of ADH Lack of insulin
32 STH promotes_____ after puberty Protein synthesis Cell differentiation Metabolism Cell division
33 It does not produce any hormone Anterior pituitary Posterior pituitary Pancreas None
34 Melanin pigment is produced under the hormone ADH MSH STH TSH
35 The hormones which share common hypothalamic factor are FSH and LH / ICSH ACTH and GH ICSH and LTH Prolactin and FSH
36 The hormone which is not secreted by anterior lobe of pituitary is GH ICSH Prolactin TRF
37 They may also control some long term changes Enzymes Neurons Hormones CNS
38 It is not a steroid hormone Epinephrine Estrogen Progesterone 17 β hydoxy Testosterone
39 It is incorrect statement about hormones Endocrine secretion Initiate metabolism Organic Transported by blood
40 Myelin is made up of Nucleoprotein Lipoprotein Glycolipids Glycoproteins
41 Which is incorrect statement about spinal cord White matter contains myelinated axons Grey matter contains non myelinated axons Grey matter contains cell bodies of sensory neurons Location of Peripheral nerve is near to spinal cord
42 Ventral root of the spinal nerve contains Sensory nerve fibres Motor nerve fibres Mixed nerve fibres All
43 Nerve which carries impulses from CNS to effectors Sensory Inter Motor Associative
44 Tiny shaped structure located deep between cerebral hemispheres Thyroid gland Pitutary gland Pineal Gland Corpus callosum
45 Part of brain that is involved in learning Cerebrum Thalamus Cerebellum Pons
46 Regulation of hunger and menstrual cycle is controlled by Cerebrum Thalamus Hypothalamus Pons
47 Primary sensory areas are present in Cerebral cortex Cerebral medulla Cerebellum Medulla oblamgata
48 Which of the following is a messenger of both chemical and nervous coordination Acetylcholine Dopamine Epinephrine Serotonin
49 Which of the following organelle is not present in the synaptic knob Mitochondria Vesicles Ribosomes Nucleus
50 Synaptic vesicles are present in synaptic knob that is part of Post synaptic neuron Pre synaptic neuron Both neurons Second neuron
51 Depolarization of neural membrane is due to Influx of K+ Efflux of Na+ Influx of Na+ None
52 Which is responsible for hyperpolarization across membrane Disturbing of charge Late closing of K+ gates Influx of Na+ Efflux of Na+
53 Which is incorrect about resting membrane potential Na+ ions are ten folds higher outside 2 Na+ move out for 3 K+ move in<span style="white-space:pre"> </span> K+ ions are twenty folds higher inside Some k+ ions leak out
54 Resting membrane potential of a neuron is 50mV -70mv -80mV 90mV
55 The simplest reflex circuit includes___ elements 1 2 3 4
56 Motor neurons are Multipolar Bipolar Unipolar Tripolar
57 This is not the part of neuron Axon Dendron Nissl’ granules Synapse
58 The neuron which has central and peripheral branches is Sensory neuron Motor neuron Associative neuron Relay neuron
59 It lacks a true dendron Sensory neuron Motor neuron Associative neuron Relay neuron
60 Which is correct about myelin sheath It speeds up conduction It is found in all axons It is found in all dendrites It is proteinaceous only
61 Non-neural cells which encapsule the axon of neurons are Microglial Microbodies Schwann cells Companion cells
62 These are the receptors which respond to the mechanical condition of internal organs Nocireceptors Receptors of skin Receptors of stomach wall Receptors of eye
63 Both meissner’s and pacinian corpuscles have____ nerve endings Spiral Encapsulated Free Deep
64 The receptors which are 27 times more abundant than cold receptors Pressure receptors Pain receptors Heat receptors Light receptors
65 How many number of autosomal chromosome pairs are present in human 22 33 44 46
66 Which of the following are suicidal bags Lysosomes Ribosomes Centriole Mitochondria
67 Which of the following cannot cross the phospholipid bilayer easily Ions Gas molecules Ethanol Steroids
68 F1 particles contain enzyme complex for: Protein synthesis ATP synthesis DNA replication Respiration
69 Pick up non-membranous organelle Lysosomes Ribosomes Centriole B and C
70 Give an example of transport across cell membrane using energy Endocytosis and exocytosis Reabsorption of Na+ from ascending loop of Henle Reabsorption of water from collecting duct All
71 An organelle having no nucleic acid in its chemical composition is Lysosomes Ribosomes Centriole Mitochondria
72 Nucleus is visible when the cell is in ____ stage Non-dividing Dividing active Both a and b
73 Passage through the pores in nuclear envelope is restricted preliminary to Proteins, RNA and protein-RNA complexes Lipids and Glycolipids DNA and RNA Glycoproteins
74 Which of the following properties is incorrect for both mitochondria and chloroplast? Both have an electron transport system ATP synthesis Both are present in all cells Both have double membrane structures
75 The semicircular channels and system of tubes found in cytoplasm are known as Ribosomes Glyoxisomes E.R Vacuoles
76 Chloroplasts and mitochondria differ from one another because Both are membranous organelles Both are non-membranous organelles Both are not present in all cells Both do not contain proteins
77 Oxidative metabolism is carried out ____ of mitochondria In the intramembrane space On the surface of inner membrane In the inside of outer membrane In the matrix
78 Which of the following statement is wrong? Fungi have mitochondria Mitochondria have DNA and ribosomes Mitochondrial ribosomes resemble more to eukaryotic ribosomes Mitochondria are self-replicating organelles
79 The synthesis of Golgi bodies is initiated by Ribosomes R.E.R S.E.R Lysosome
80 Which one of the following is site of oxidative Phosphorylation in mitochondria Cristae Outer membrane Matric Ribosome
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