WBJEE Biology Previous Year (2009)
80 Questions MCQ Test WBJEE Sample Papers, Section Wise & Full Mock Tests | WBJEE Biology Previous Year (2009)
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Distance between adjacent base pairs = 3.4Å
Which Ig is produced in primary immune response?
IgM is produced in primary response to the given antigen
The average diameter of Red Blood Corpuscles of man is
The average diameter of RBC of man is 7.2 µ m
FAD is electron acceptor during oxidation of which of the following?
FAD is electron acceptor during oxidation of succinic acid to fumaric acid
The chemical nature of hormones secreted by α & δ cells of pancreas is –
Hormones produced by α cells (glucagon) and β cells (somatostatin) are polypeptide
The genetic material of Rabies virus is ss RNA
T-lymphocyte are produced in bone marrow but mature in thymus
How many ATP molecules are obtained from fermentation of 1 molecule of glucose?
Two molecules of ATP are produced by fermentation of one molecule of glucose
Three nitrogenous bases are found in a codon.
A character which is expressed in a hybrid is called
Dominant gene is expressed in a hybrid
In which stage of cell division chromosomes are most condensed?
Chromosome is most condensed in metaphase
Down’s syndrome is trisomy of 21st chromosome
Genetically engineered bacteria are being employed for production of
Human insulin is now being produced by genetically engineered bacteria (E.coli). This insulin is called Humulin
Helianthus annuus is sunflower
By which of the following methods, new and better varieties of plants can be formed?
Better variety of plant can be formed by hybridisation followed by selection.
Malic acid is product of aerobic respiration
RUBP (Ribulose 1.5. biphosphate) is CO2 acceptor in C3 plant
Ivanowsky discovered virus
Electrton microscope is based on principle of electromagnetic theory
Citric acid cycle is the alternate name of which of the following?
Citric acid cycle or Krebs’cycle or Tricarboxylic acid cycle is alternative names
Vascular tissue in higher plants develop from which of the following :
Procambium forms vascular tissue in higher plants
Etai etia is caused by Cd
Chromosomes can be stained with one of the following chemicals
Acetocarmine is used to stain chromosome
Which one of the following is the American Poultry breed
Rhod island Red is the American Poultry Breed
Cerebrum is the largest part of brain
When the other floral parts are arranged at the base of the gynoecium, the flower is called :
Hypogynous flower/Superior ovary
In a CAM plant the concentration of organic acid :
In a CAM plant the concentration of organic acid increases during night
Protein coat of virus is called capsid
Net yield of aerobic respiration during Krebs’ cycle per glucose molecule is :
Net yield of 2ATP for two Krebs’ cycle (1 glucose molecule) is produced at SLP
Feedback inhibition of enzymes is affected by which of the following
Feedback inhibition is affected by end products
The discovery of gibberellins is related with one of the following :
Bakanae disease of rice/foolish seedling disease, discovered in Japan
Ornithophily refers to the pollination by which of the following :
Pollination by bird is called ornithophily
Which f the following is an example of man-made ecosystem?
Aquarium is man-made ecosystem
. Respiratory enzymes are present in the following organelle :
Mitochondrion has respiratory enzymes for food oxidation
Pellagra is caused due to deficiency of the vitamin :
Pellagra is caused by Niacin (nicotinic acid)
Which one of the following Leucocytes transforms into macrophages?
Monocytes transforms to form macrophages
Incubation period of P.vivax is 10-14 days
The specific region of Hypothalamus, responsible for physiological sweat secretion, is
Paraventricular nucleus of hypothalamus is related to sweat secretion
The duration of cardiac cycle is 0.8 sec
. The intensity levels of whispering noise is :
The wildlife Protection Act was introduced in :
In honey the percentage of Maltose and other sugar is
Identify the correct type of food chain :
dead animal → blow fly maggots → common frog → snake
It is Detritus food chain. Always starts from dead organic material.
Which is not applicable to the Biological species concept ?
Hybridization is not applicable to the bilogical species concept
DNA sequence that code for protein are known as —
Exon is a part of DNA which codes for a protein
Which one of the following is a systemic insecticide ?
The systemic insecticide is parathion
The resolving power of a compound microscope will increase with —
Decrease in wavelength of light and increase in numerical aperature is responsible.
Osteomalacia is a disease caused by the deficiency of —
Osteomalacia is caused by calciferol deficiency in body
Which is the correct sequence of arrangement of types of W.B.C. in decreasing order in terms of number per mm3 of human blood ?
Go is the arrest / suspended phase of cell cycle.
It is formed by parthenocarpy (i.e. without fertilization)
The major site of protein breakdown to form free amino acids is in the
Collagen is scleroprotein that requires vit-C for synthesis
Glycogen is a homopolymer of glucose
Graham’s law of diffusion, rate of diffusion 
Which of the following does not act as a neurotransmitter ?
Tyrosine is not a neurotransmitter, it is an amono acid.
The generation of excitation-contraction coupling involves all the following events except :
During generation of excitation contraction coupling calcium is attached to troponin
HIV kills helper T cells.
Generally artificial Pacemaker consists of one battery made up of
Lithium halide battery is used in artificial pacemaker
Goitre can occur as a consequence of all the following except :
Excessive intake of exogenous thyroxine will not produce the symptoms of Goitre.
Pernicious anaemia results due to deficiency of
Pernicious anaemia is caused by deficiency of vit B12 or Cyanocobalamine
Which of the following substances yield less than 4 Kcal/mol when its phosphate bond is hydrolysed
The Genetic deficiency of ADH-receptor leads to
Nephrogenic diabetes is due to genetic deficiency of ADH-receptor linked to x-chromosome.
Out of A-T, G-C pairing, bases of DNA may exist in alternate valency state owing to arrangement called
Tautomers are isomers of organic compund that readily interconvert by a chemical reaction. Commonly this reaction result in the formed migration of a H-atom or proton.
Cellular Totipotency was first demonstrated by
Molecular scissors which cut DNA at specific site is
Restriction endonuclease is used to cut DNA at specific site (molecular scissor).
Lichon is the indicator of SO2 pollution
Sporopollenin is chemically a fatty substance that persits in fossil state.
During replication of DNA, Okazaki fragments are formed in the direction of :
Okazaki fragments are formed in the direction of 5′ → 3′ , they join after wards.
The chemical nature of chromatin is as follows :
Chromatin = nucleic acid + histone proteins + non - histone proteins
Laveo bata is a minor carp., it size is smaller and growth rate slower
Aedes albopictus is an Asian tiger mosquito.
Average size of filteration slit of glomerulus is 25 nm.
Ornithorhynchus (Duckbilled platypus) is monotreme.
Scrirpophaga incertelus is a monophagus pest that feeds on a single plant.
Which one of the following ancestors of man first time showed bipedal movement ?
Trophic levels in ecosystem is formed by organisms linked in the food chain
Ethylene is a gaseous plant hormone that acts for ripening.
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