RL BIO 1 Flashcards
●Coconut milk factor is:
Cytokinin
●Which element increases the absorption of water andcalcium in plants?
Boron
●Which wood will become useless soon after exposingin the open air?
Wet Wood
●The cross-section of a stem of tree has fifty rings.What is the age of the tree?
50 years
●Onion is a modified form of:
Stem
●The pollination of maize takes place by:
Pollinationby air
●The age of trees is determined by its:
growth rings
●Fruits of this plant are found underground:
Groundnut
●Clove, the commonly used spice, is obtained from the:
Flower bud
●Maximum photosynthetic activity occurs in:
Blueand Red region of light
●Where is the Botanical Survey of Indiaheadquartered?
Kolkata
●Oxygen liberated during photosynthesis is comingfrom:
Water
●During photosynthesis the liberated gas is:
Oxygen
●Water in plants is transported by:
Xylem
●Where are the Eucalyptus trees found in abundance?
Nilgiri Hills
●Clove, the commonly-used spice, is obtained fromthe:
Flower-bud
●Hashish is obtained from a plant. From which part ofthe plant is it obtained?
Exudates from leavesand female inflorescences
●The chemical used for destroying Fungi in watertanks is:
Copper Sulphate
●The source of oxygen generated duringphotosynthesis is:
Water
●Which components of light are absorbed bychlorophyll?
Violet and Red
●Ginger is a stem and not a root because:
It hasnodes and inter-nodes
●Eyes of potato are useful for:
Vegetativepropagation
●What is not a component of chlorophyll?
Calcium
●Carrot is orange in colour because:
It containscarotene
●What is true regarding plant cells and animal cells?
Plant cells contain chloroplast while animalcells do not
●Silk is obtained from:
Saliva of the silk worm
●The seeds of certain plants fall to germinate if they donot pass through the digestive tract of fruit-eatingbirds. This is due to:
Seed coat impermeability
●Sucrose content in sugarcane decreases:
If frostoccurs during the period of ripening
●During photosynthesis green plants absorb:
Carbon dioxide
●Through ‘Photosynthesis’ green plants generate:
Organic materials
●Ripe grapes contain:
Fructose
●The age of a tree can be determined more or lessaccurately by:
counting the number of rings inthe trunk
●The sweetest sugar is
Fructose
●Maximum harm to a tree is caused by:
loss of allleaves
●Mineral constituent of chlorophyll is:
Magnesium
●Chewing gum is made from:
Latex
●After fertilization the zygote of a seed plant becomes:
Embryo
●The annular and spirally thickened conductingelements generally developed in the protoxylemwhen the root or stem is:
Differentiating
●Cell elongation in inter-nodal regions of the greenplants takes place due to:
Gibberellins
●Phototropic and geotropic movements in plants havebeen traced to be linked with:
Auxin
●The first case of polyembryony was reported incertain orange seeds by:
Antoni VanLeeuwenhoek
In a seed plant the microspore gives rise to the:
Pollen grain
●When the concentration of the soil solutes is low, theabsorption of water is:
increased
●Nuclear spindle consists of three types of fibres:
interzonal, continuous and discontinuous
●What carries a message from DNA in the nucleus tothe ribosomes in the cytoplasm?
m-RNA
●A pine seed has cotyledons and tissue from the:
Female gametophyte
●In a flower, which terminal structure is part of astamen?
Anther
●Which acid is a derivative of carotenoids?
Abscisicacid
●Phototropic curvature is the result of unevendistribution of:
Auxin
●Which is a gaseous plant hormone?
Ethylene
●Antheridia and Archegonia are sex organs of:
Moss
●In which group would you place a plant whichproduces seeds but lacks flowers?
Gymnosperms
●In glasshouses (green houses) when plants are kept onartificial light and temperature, the method iscalled:
phytotron
●Natural cytokinin are synthesized in tissues that are:
dividing rapidly
●With regard to photorespiration in plants, the correctstatement is:
It occurs in chloroplasts
●In a plant organ, which is covered by periderm andthe stomata are absent, some gaseous exchangestill takes place through:
Lenticels
●The carbohydrates synthesized in the leaves aretransported through sieve tubes most commonlyin the form of:
Sucrose
●Best defined function of Manganese in green plantsis:
Photolysis of water
●Stomata open is due to accumulation of:
K
●When pea seeds and wheat grains are soaked inwater, pea seeds showed more swelling than thewheat. The reason is:
Imbibitions capacity ofproteins is more than that of starch
●Which denotes the water potential of the mesophyllcell in wilted condition?
Equal to the value ofosmotic potential
●Which minerals activate the enzymes involved inrespiration?
Magnesium and manganese
●The minerals involved in water-splitting reactionduring photosynthesis are:
Manganese andChlorine
●A nutritionally wild type organism, which does notrequire any additional growth supplement isknown as:
Prototroph
●Humidity in atmosphere decreases rate of:
Transpiration
●Guttation is the result of:
Root pressure
●Hydathodes are also called:
water stomata
●The sugarcane Plant has:
dumb bell-shaped guardcells
●If water enters in a cell, the pressure exerted by itsswollen protoplast is:
Turgor pressure
●What is the most accepted theory for movement ofwater through plants?
Cohesion theory
●With an increase in the turgidity of a cell, the wallpressure will:
increase
●Opening and closing of stomata is due to the:
Change in Turgor pressure of guard cells
●Water will be absorbed by root hair when:
concentration of solutes in the cell sap is high
●Little leaf is caused due to the deficiency of:
Zinc
●Mineral salts which are absorbed by the roots fromsoil are in the form of:
Very dilute solution
●Most plants obtain their nitrogen from the soil in theform of:
Nitrates
●Nitrogen fixing bacteria were discovered by:
Winogradsky
●Non-legume nitrogen fixing organisms belongs togenus:
Franken
●In root nodules of legumes, leg-haemoglobin isimportant because it:
Acts as an oxygenscavenger
●A rootless aquatic plant in which a portion of the leafforms a tiny sac for trapping insects, is
Utricularia
●If by radiation all nitrogenase enzymes areinactivated, then there will be no:
Fixation ofnitrogen in legumes
●In soil, water available for plants is:
Capillarywater
●The ratio between 2-carbon and 3-carbonintermediates having
NH2 group formed inphotosynthetic oxidation cycle is: 2:1
●In higher plants, continuity of cytoplasm from onecell to its neighbouring cells is establishedthrough:
Symplast
●The amount of water held by the soil after drainage isknown as:
Field capacity
●Attraction of water molecules to polar surfaces isknown as:
Adhesion
●When the conditions are dry, a grass leaf curlsinward to minimize water loss due to presence of:
Bulliform cells
●Both photosynthesis and respiration require:
Cytochromes
●Wilting of a plant results from excessive:
transpiration
●The phytohormone, which increases theconcentration of potassium in guard cells is alsoresponsible for the induction of:
cell division
●Potometer works on the principle of:
Amount ofwater absorbed equals the amount transpired
●According to Steward’s starch hydrolysis theory,which is the principal reason for the opening ofstomata during daytime?
Photosyntheticutilization of CO2 in guard cells
●Cohesion theory of water movement in plants was putforth by:
Henry Dixon
●Which force is responsible for raising water up to 100m of tall plants?
Transpiration pull
●The first process by which water enters into the seedcoat when a seed is placed in suitable environmentfor germination is:
Imbibition
●Opening of floral buds into flowers, is a type of:
Autonomic movement of growth
●In a flowering plants megaspore undergoes mitosisand develops into a:
Seed
●The importance of day length in flowering of plantswas first shown in:
Tobacco
●The assimilatory power i.e., NADPH2 and ATP areformed in light or:
Hill’s reaction
●A fresh water green alga, rich in protein is:
Chlorella
●Compared with the gametophytes of the bryophytesthe gametophytes of vascular plants tend to be:
Smaller and to have smaller sex organs
●Differentiation of shoot is controlled by:
Highcytokinin : auxin ratio
●Corn and beans are often cited as representativeexamples of _____, respectively.
Monocots anddicots
●Gymnosperms produce neither flower nor fruitbecause they do not possess:
Ovary
●In a flower, ______ generally consist of two pollensacs.
Anthers
●An enzyme that can stimulate germination of barleyseeds is:
á-amylase
●Seed dormancy is due to:
Abscisic acid
●Heparin is secreted by:
Mast Cells
●Interdependent genes with related functions form:
A co-adapted gene complex
●The major constituent of vertebrate bone is:
Calcium phosphate
●Animals do not have enzyme systems which enablethem to make use of the energy from:
Water
●A clone is a colony of:
cells having similar geneticconstitution
●Which of the following is the largest living bird?
Ostrich
●In the case of test tube babies:
embryo is placed inuterus after 2 months
●A rare and endangered animal in Silent Valley is:
Lion-tailed Macaque
●AIDS virus has:
double stranded DNA
●Anglo-Nubian is a breed of:
Goat
●Which blood group is a universal recipient?
AB
●Rod shaped bacteria is called:
Bacillus
●The animal which has become extinct recently inIndia happens to be:
Cheetah
●All the progeny obtained from a single plant byvegetative propagation are called:
Clones
●What is a Sponge?
An animal
●Which blood group may be present in the children ofa couple having blood groups A and Brespectively?
A, B and AB
●Who discovered sex hormones?
Eugen Steinach
●Fermentation is a process of decomposition of anorganic compound by:
Enzymes
●What are the basic units from which human spareparts can be created?
Stem cells
●Adherent mucoid alkaline substance covering theinner lining of stomach is to:
Prevent the actionof pepsin of mucosa
●Which blood cell is compulsory for bloodcoagulation?
Platelets
●Which was the first antibiotic?
Penicillin
●Virus contains:
Protein and lipid
●How many feet has a crab got?
8
●The presence of what distinguishes a plant cell froman animal cell?
Chloroplasts
●The hybrid between horse and donkey is called:
Mule
●Yawning occurs:
due to excess concentration ofCO2 in blood
●Which vitamin helps in blood coagulation?
Vitamin-K
●A substance that stimulates the production ofantibodies when introduced into a living organismis known as:
Antigen
●’Darwin finches’ refer to a group of:
Birds
●In male sharks, Claspers are found attached to:
Pelvic fin
●The animal which uses sounds as its ‘eyes’ is:
Bat
●Taenia sodium (Tape worm) lives as a parasite in:
Intestine of man/woman
●An ant can see the objects all around it due to thepresence of:
Compound eyes
●What is the approximate time required for aheartbeat?
0.8 second
●Who discovered the Cholera-bacillus?
RobertKoch
●Which animal produces the biggest baby?
BlueWhale
●Heart attack occurs due to:
Lack of blood supply tothe heart itself
●Camel is a desert animal that can live without waterfor many days because:
it does not need muchwater and water is formed in the body due tooxidation of fat
●The concept of ‘survival of the fittest’ was firstadvocated by:
Darwin
●The name of the first cloned sheep was:
Dolly
●Which hormone is released in excess quantity duringexcitement?
Adrenaline
●Scientific study of birds is known as:
Ornithology
●A non-poisonous snake is
Python
●Olive Ridley is a famous:
Turtle species
●Lac which is used as sealing wax is produced by:
Insect
●The language used in writing the scientific name ofanimals is:
Latin
●The study of visceral organs is:
Splanchnology
●The branch of biology dealing with the study of cellsis known as:
Cytology
●The study of extinct animals is called:
Paleontology
●Johann Gregor Mendel is famous for propounding:
Laws of Heredity
●What is an endoscope?
It is an optical instrumentused to see inside the alimentary canal
●Of all micro-organisms, the most adaptable andversatile are:
Viruses
●Which animal is called farmer’s friend?
Earthworm
●The term ‘gene’ was coined by:
W.L. Johannssen
●Dinosaurs were:
reptiles that became extinct
●Sweat glands in mammals are primarily concernedwith:
Thermoregulation
●Birds usually have a single:
Ovary
●In which vertebrate oxygenated and deoxygenatedblood gets mixed?
Amphibian
●The chemicals released by one species of animals inorder to attract the other members of the samespecies are:
Pheromones
The colour of cow’s milk is slightly yellow due to thepresence of:
Carotene
●Animals living in the three trunks are known as:
Arboreal
●Plasma membrane in eukaryotic cells is made up of:
Phospholipids
●What is called the ·power plants of the cell?
Miochondrion
●What is the chemical name of vinegar?
Acetic acid
●Spermatids derive the nourishment from:
Ciliatedepithelial cells
●Oxytocin is secreted by:
pituitary gland
●The protoplasm of the fibres of striated muscle,excluding the myofibrils, is called:
Sarcoplasm
●Guineaworm, Hookworm and Tapeworm areendoparasite, while ringworm is a skin diseasecaused by:
fungus
●Taste buds located on tongue, are example of:
Exteroreceptors
●Body cells infected with virus produce a proteincalled:
Interferon
●A disease of arteries in which the wall of arteriesbecome thickened and rigid, and blood flow ishindered-
Arteriosclerosis
●A protein produced by viral infected body cells andsome lymphocytes, often in response to presence ofdoublestranded RNA in the cell?
Interferon
●Capacitation of sperm in mammals involves:
Acrosome reaction
●The only poisonous lizard of the world?
Heloderma
●Which is autosomal dominant abnormalities of theeyes, cardiovascular system and the skeletalsystem?
Marfan syndrome
●The cytoplasmic segment of striated muscle fibre istermed:
Sarcoplasm
●The polio virus enters the body through:
Contaminated food and water
●Products of adenine and guanine metabolism areexcreted by humans as:
Uric acid
●Sensory cells that occur in the pits or canals of lateralline system of fishes are:
Neuromast
●The secretions from which of the following glandsform ootheca in cockroach?
Colleterial glands
●The rate and force of the heartbeat, the secretion ofdigestive glands are controlled by the:
Autonomic nervous system
●The extra embryonic membranes of mammalianembryo are derived from:
Trophoblast
●Lining of human intestine is:
Brush border
●Humans having which group blood, have no bloodgroup antigens, but possess both ‘a’ and ‘b’antibodies?
‘O’ group
●Glycosidic bond is broken during digestion of:
Starch
●Passive food ingestion in Amoeba is known as:
Import
●In gout patients, high level of which one of thefollowing is found in blood?:
Uric acid
●The anion present in pancreatic juice is:
Bicarbonate
●Preganglionic sympathetic fibres are:
Cholinergic
●The muscles associated with the heart of insects are:
Alary
●The goblet cells present in the intestinal lining are:
Merocrine
●Chaga’s disease is caused by:
Trypanosoma cruzi
●A chemical process common in the digestion of allkinds of food is:
Hydrolysis
●The P-wave of the electrocardiogram is associatedwith:
Depolarization of atrial muscular tissues
●In mammalian heart, the pulmonary is powered by:
Right atrium and right ventricle
●Dartos tunic muscle fibres occur in:
Scrotal Wall
●Which muscles help urinary bladder to expel urineforcefully?
Detrusor muscle
●During embryonic development in humans, morula isenclosed by:
Zona pellucid
●Milk teeth in a child of 3-4 years do not include:
Molars
●In humans, which brain wave pattern disappearsentirely during sleep?
Alpha waves
●T8 cells are related with:
Cytotoxic T cells
●Which part of brain allows one side of brain tocontrol opposite side of body?
Medulla
●Fetuin is found in:
Fetus
●Hensen’s body is associated with:
Organ of Corti
●Sensory receptor of warmth located principally at thelip of fingers is known as:
Ruffini’s corpuscles
●Negri bodies are associated with:
Rabies
●Schultze’s bundle is associated with:
Spinal Cord
●Schlemm’s canal is present in:
Eye
●Capsule of Tenon is associated with:
Eyeball
●Ancestral amphibians were tetrapods that evolvedduring:
Carboniferous period
●The wall of heart is made up of:
Epicardium,Myocardium and Endocardium
●Genetic counsellors can identify heterozygousindividuals by:
Screening procedures
●Which enzyme is secreted by intestinal mucosa thatremain closely associated with the microvilli?
Peptidase and Disaccharidase
●What is absorbed by intestinal mucosa by activetransport?
Galactose and Glucose
●A starving person consumes first:
Stored glycogen
●The functional unit of contractile system in striatedmuscle is:
Sarcomeres
●Globular proteins undergo structural changes inresponse to extremes of pH or temperature, iscalled:
Denaturation
●The study of relationships between size and shape isknown as:
Allometry
●A localised tumour covered by connective tissue iscalled:
Benign Tumor
●Hürthle cell is associated with:
Thyroid gland
●A metastatic cancerous tumour is termed ‘sarcoma’,if the disorder is in:
Fibroblasts
●Graft between isogenic individuals is known as:
Syngraft
●The most striking example of point mutation is foundin a disorder called:
Sickle-cell anaemia
●The spherical structured organelle that contains thegenetic material is:
Nucleus
●Protoplasm found inside the nucleus is known as:
Nucleoplasm
●Prokaryotic genetic system has:
DNA but nohistones
●Carbohydrates present in the plasmalemma are inthe form of:
glycolipids and glycoproteins
●Cell organelles are embedded in:
Cytoplasm
●Cellular totipotency means:
Capability of a plantcell to form complete plant
●Distinction of prokaryotes and eukaryotes is basedon:
Nucleus
●In a Golgi complex the structure which is thefunctional unit is:
Cisternae
●In eubacteria, a cellular component that resembleseukaryotic cell is:
Plasma membrane
●Intact chloroplast from green leaves can be isolatedby:
Sucrose solution
●Intracellular compartments do not occur in:
Prokaryotes
●Longest cells in human body are:
nerve cells
●Mitochondria do not occur in which of the following?
Bacteria
●Nuclear matter without envelope occurs in:
Bacteria and Cyanobacteria
●The Golgi apparatus:
Modifies and packagesproteins
●Prokaryote is characterized by:
Dispersed DNAand lack of membrane bound organelles, Absenceof nuclear envelope and Absence of nucleolus
●The main arena of various types of activities of a cellis:
Cytoplasm
●When a ripe tomato is pricked with a needle a wateryfluid comes out. This fluid is stored in:
Vacuole
●Organisms with very high intrinsic growth rateshave:
Short generation times
●Mutations which are large and conspicuous are calledmacromutations and those very inconspicuous arecalled:
Micromutation
●The rate and force of the heart-beat, and thesecretion of digestive glands are controlled by:
Autonomic Nervous System
●Mammillary bodies are attached to the ventral sideof:
Diencephalon
●Sweating on palm and sole due to psychic stimuli iscalled:
Cold sweat
Inherited Rh gene is found in:
Breadykinin
●The ‘soft spot’ on the top of an infant’s skull is called:
Fontanel
●Concentration of carbonic acid does not increase inblood due to the presence of:
Na
●Staph food poisoning is related with:
Staphylococcus bacteria
●Enzymes promote chemical reaction by:
Reducingthe activation energies
●The modification of hind pair of wings into halteres isthe characteristic of:
Diptera
●A molecule of ATP is structurally similar to amolecule of:
RNA molecule
●Class Trematoda belongs to the phylum:
Platyhelminthes
●Albinism is caused due to lack of production of:
Tyrosine 3-monooxygenase
●Maximum power of division is found in the skinlayer:
Stratum malpigh
●Tube feet are characteristic of:
Star Fish
●Acetylcholine is responsible for transmission of nerveimpulses through:
Synapses
●Loss of ability to speak due to defect of vocal organsis called:
Alalia
●Termination of amino acid chain requires codons:
UAG, UAA, UGA
●’A tube within a tube’ body plan is met within:
Ascaris
●The parts of neurons that perform basic cellularfunctions, such as protein synthesis, are the:
Somas
●Lewy bodies are found in:
Brain
●Prosoma in scorpion comprises:
Head and thorax
●What causes Pituitary Nanism?
Hyposecretion ofSomatotrophic hormone
●A hormone that stimulates the secretion of pancreaticsecretions to neutralize the acid chyme from thestomach, is:
Secretin
●Cross bridges, which connect the molecules of a fibrilduring muscle contraction, are made of:
Myosin
●Muscles of alimentary canal are chiefly:
Unstriatedand neurogenic
●Muscles of which of the following are smoothunstriated and are innervated by fibres of ANS?
Muscles of alimentary canal
●The photosensitive parts of rod cells are made up of:
Rhodopsin
●The protein which maintains the muscular storage ofoxygen is:
Myoglobin
●In a normal person at rest the cardiac output oramount of blood pumped per minute by the leftventricle is approximately:
5 litres
●Biogeographical regions are also called:
Realms
●Human nerve cells develop from the embryonic:
Ectoderm
●Vertebrate kidney has a following basic unit:
Nephron
●The infective stage of malaria parasite is:
Sporozoite
●FSH and LH hormones together are called:
Gonadotropic hormone
●Shivering in severe cold is caused by:
Involuntaryaction of striated muscles
●Hypocalcaemia is caused due to under secretion of:
Paratharmone
●The emergency hormone in humans is:
Adrenaline
●Polio immunizing vaccine was developed by:
Dr.Salk
●In mammals which organ acts as blood bank?
Spleen
●Structure involved in Addison’s disease is:
AdrenalCortex
●Biceps and Triceps surround:
Humerus
●Chemical nature of insulin is:
Protein
●The application of genetic principles for theimprovement of mankind is:
Eugenics
●Cockroach and other insects possess an:
Open typevascular system
●Ganglioside is found in:
Nerve
●’Metachrosis’ is found in:
Amphibians
●Healthy parents with normal height gave birth to aachondroplasia (dwarf) child. This is due to:
Spontaneous mutation
●The limited period of sexual receptivity that occursaround the time of ovulation in all femalemammals except humans is called:
Estrus
