Random Flashcards
CCA base sequence is present in which part of t-RNA?
3’ end
In which year was genetically engineered insulin first made?
1983
Are natural killer cells granular or agranular?
Granular
Phase of maturation in spermatogenesis involves the
Formation of spermatids from primary spermatocytes
The stop codons are
UAG, UAA, and UGA
Buttress roots arise from
Base of tap root and trunk
What are the functions of membranous labyrinth?
Hearing and balance
What kind of nucellus is found in polypetalae?
Well-developed
How many tegments are found in polypetalae?
2
Enzyme TPA (tissue plasminogen activator) is used to
Dissolves blood clots
Estuary is the
Meeting point of fresh water and sea water
Which is one of the most poisonous product formed by the burning of chlorine containing waste?
Dioxin
Placental wolf and tasmanian wolf are examples of
Analogy
The most important function of K+ ion in plants in
Acts as an enzyme for many physiological processes
In which cell of C4 plants does the primary fixation of co2 occur?
Mesophyll cell
Hypogeal germination is found in rice, true or false?
False
Hypogeal germination is found in onion, true or false?
True
Petunia has valvate aestivation, true or false?
True
What type of phyllotaxy is found in Psidium?
Opposite phyllotaxy [Psidium= guava]
In bryophytes, operculum develops from
Archegonium
Mala-D is a weekly oral contraceptive pill, true or false?
False. Mala-D is a daily oral contraceptive pill.
Name a monthly oral contraceptive pill.
Quinestrol
Which mouth parts are present to the lateral side of the pre-oral cavity of cockroach?
Mandibles and 1st maxilla
A fruit that dehiscences from apex to base and is derived from monocarpellary ovary with marginal placentation is
Legume
Water cavity is absent in the stems of which plants?
Dicots
Water cavity is present in the stems of which plants?
Monocots
Can fehling solution detect starch?
No
If testa is removed from water soaked gram seed, the remaining structre is
Fully mature embryo
Cosmid is a vector for carrying large DNA fragments into host cells. True or false?
True
Interferon is an enzyme that interferes with DNA replication. True/false?
False
Study of the effect of global warming on human population comes under
Population ecology or autecology
Coniferous forests are evergreen forests. True/false?
True
Tundra has permafrost. True/false?
True
Acacia trees are found in savannahs. True/false?
True
Scrubbers and electrostatic precipitators are generally used for removal of
Particulate matter
What type of circulatory system does Balanogolossuses have?
Closed type
Balanoglossus have a short trunk. True/false?
False. They have a long trunk.
Peritubular capillaries of the nephron arise from the
Efferent arterioles
What are the changes in ciliary muscle and eye lens when nearby objects are viewed?
When nearby objects are viewed, ciliary muscles contract making the lens more convex, thus decreasing its focal length. The lens thickens.
What are the changes in ciliary muscle and eye lens when distant objects are viewed?
When far objects are viewed, ciliary muscles relax making the lens less convex thus increasing the focal length.
A trisomic aneuploidy patient having double barr body and problem in menstrual cycle has a genetic problem called
Multi X female (super female)
(a) It is not a congenital disease.
(b) Spreads due to conscious behaviour.
(c) Loss of contact inhibition.
(d) “Don’t die of ignorance” is said in reference to it.
(e) Metastasis
How many of above statements are not correct regarding AIDS?
Two
c and d
During evolution, the first living beings were like actinomycetes. True/false?
False. They were like bacteria.
Milk formation and secretion is the function of a hormone secreted by adenohypophysis. True/false?
true
Increase in calcium levels of body is the function of a hormone secreted by adenohypophysis. True/false?
False
What is phenetic classification? What are the other names for phentic classification?
Phenetic classification is the classification of organisms based on morphology. It is also known as taxometrics and numerical taxonomy.
In which kingdom only heterotrophic, holozoic and saprophytic modes of nutrition found?
Kingdom animalia
Capsella belongs to which family of plants?
Brassicaceae
What condition of stamens are found in Capsella?
Tetradynamous
Tetradynamous condition of stamen is found in family cucurbitaceae. True/false.
False
In conjoint vascular bundles, xylem surrounds phloem. True/false?
False.
In conjoint vascular bundles which the two types of tissues are separated from one another.
In collateral vascular bundles, xylem surrounds phloem or vice versa.
Towards which surface is the xylem located in leaf?
Adaxial epidermis
Active K+ exchange mechanism for stomatal movement was given by
Levitt
Polymerase chain reaction requires thermostable DNA polymerase, DNA ligase and primase. True/false?
False.
PCR only requires thermostable DNA polymerase of the three.
What is the ratio of HNO3 and H2SO4 in acid rain composition?
3:7
A lake near a village suffered heavy mortality of fish within a span of a few days. The possible reasons are
(a) Lot of urea and phosphate fertilizers were used in nearby crops.
(b) The area was sprayed with DDT by an aircraft.
(c) Lake water turned green and stinky.
(d) Phytoplankton population declined reducing photosynthesis.
a,c
What type of vision is found in cockroach?
Apposition or mosaic vision
What is supination?
Palm facing upwards
What is pronation?
Palm facing downwards
Humans can show supination and pronation of palm with the help of
Pivot joint
At postsynaptic membrane the new potential developed is called action potential. True/false?
False. It is called postsynaptic potential.
Filling of urinary bladder is associated which autonomous nervous system?
Sympathetic nervous system
Is increase in salivation a function of sympathetic nervous system?
No
In Ascaris, genital duct and digestive duct join to form cloaca. True/false?
True
In earthworm, genital duct and digestive duct join to form cloaca. True/false?
False
In Taenia, genital duct and digestive duct join to form cloaca. True/false?
False
In Locust, genital duct and digestive duct join to form cloaca. True/false?
False
In which part of bacteria are respiratory enzymes found?
Cell membrane
Phanerogams are seeded plants, true or false?
True
Which sugar is found in the haemolymph of insects?
Trehalose
Glutamate dehydrogenase is an important enzyme involved in
Amino acid biosynthesis
During an experiment, vegetative nucleus was destroyed inside the pollen tube. Immediately afterwards it was observed that the growth of pollen tube was stopped and pollen tube could not reach up to ovule, because
Growth of pollen tube is controlled by vegetative nucleus
HindIII produces blunt ends. True/false?
False
EcoRV produces blunt ends. True/false?
True
Sonneratia trees are found in which forests?
Mangrove forests
[Sonneratia= sunderbans]
In which biomes are Dipterocarpus (shorea trees) found?
Deciduous forests
In which biomes are Tendu trees found?
Deciduous forests
In which biomes are Hopea trees found?
Deciduous forests
File like rasping organ is absent in which mollusc?
Loligo
Their function is to move particles or molluscs in specific direction over the epithelium. They are mainly present in inner surfaces of hollow organs. Identify the cells in above mentioned sentence.
Cuboidal ciliated epithelium
If due to some injury, the chordae tendineae of the tricuspid valve of the human heart become non-functional, what will be the immediate effect?
The flow of blood into the pulmonary artery will be reduced.
What is the function of duct of bellini?
Conduction of urine
Aperture of an eye can be changed by
Iris
Which organism was the common ancestor of birds and crocodile?
Thecodontia
Agranal chloroplast are found in which cells?
Bundle sheath cells of monocot
Glucose is absorbed in body through which process?
Active transport, simple diffusion and facilitated diffusion
Osmosis involves diffusion of water from its more to less concentrated side. True/false.
True
Intrafascicular cambium is secondary in origin. True/false?
False. It is primary in origin as it originated from embryonic meristems.
Which is the msot abundant type of configuration of proteins?
Tertiary protein
Global agreement in specific control strategies to reduce the release of ozone depleting substances was adopted by which protocol?
Montreal protocol
Global agreement in specific control strategies to reduce the release of greenhouse gases was adopted by which protocol?
Kyoto protocol
Gills in apple snail are found in which part of the body?
Mantle cavity
Which type of regeneration is found in planaria?
Morphallaxis
What is morphallaxis?
In Morphallaxis, any cut part of the organism regenerates into whole organism.
What is epimorphosis?
In Epimorphosis, the cut or injured part of the organism is repaired. The cut part is regenerated.
Sphenodon is the scientific name of
Tuatara
Reptiles have mesonephric kidneys, true or false?
False
Reptiles have metanephric kidneys.
What is the ploidy of zygospore?
Diploid
Phycomycetes show all types of syngamy. True/false?
True
If a recombinant DNA bearing gene for ampicillin is transferred into E.coli cells and the host cells are transferred to ampicillin containing medium, the transformant grows but untransformed host dies. True/False?
True
What is the ploidy of a diploid cell in the G2 phase of mitosis?
2n
If the number of chromosomes are four, what are the number of chromatids in prophase?
8
What are Balbiani rings?
The bands of polytene chromosomes become enlarged at certain times to form swellings called puffs. In the regions of puffs, the chromonemata uncoil and open out to form many loops.The puffs indicate the site of active genes where mRNA synthesis takes place. These loops are called Balbiani rings
Which form of nitrogen does rhizobium convert?
Rhizobium converts atmospheric nitrogen.
WHat is a wetland?
Wetland is a flooded ecosystem where oxygen free processes prevail.
Which phytohormone increases the shelf life of fruits?
Cytokinin
In MOET fertilised eggs are removed surgically at 8-32 cell stage and transferred to surrogate mother. True/false?
False.
In MOET fertilised eggs are removed <b>non</b>-surgically at 8-32 cell stage and transferred to surrogate mother.
Sodium citrate is used as a chelating agent to clot blood. True/false?
True
Blood without clotting factors is called serum. True/false?
False. It is blood plasma without fibrinogens.
When was the first animal cloned?
1996 (dolly)
Knockout mouse is genetically modified by replacing its existing gene with an artificial gene.True/false?
True
How many parotid, submaxillary and sublingual glands are present?
One pair each
Glomerular filtration rate is filtrate formed by each kidney per minute and it is 125 ml/min. True/false?
False. Glomerular filtration rate is filtrate formed by <b>both </b> kidney per minute and it is 125 ml/min.
Which part of male reproductive system is analogous to labia majora of females?
Scrotum
What are the four key stages of anaerobic digestion to form biogas?
Hydrolysis, acidogenesis, acetogenesis and methanogenesis
Biocenology is the study of
Community, it is the study of interaction of living and non living things.
In flowering plants archesporium gives rise to
Wall and sporogenous tissue
Agar agar is obtained from
Red algae
The most primitive and advanced type of placentations are , respectively ,
Superficial and basal placentation
In the process of aerobic respiration, how many ATP molecules will be generated from one molecule of triose phosphate?
20
Which one is the precursor of ethylene?
Methionine
Radish is a perennial plant, true/false?
False. It is annual/biennial.
Mango is an annual plant. True/false?
False. Mango is a perennial plant.
WHat is the concentration of methane among the major greenhouse gases?
20%
What is the concentration of CFCs among the major greenhouse gases?
14%
Nucleases and amylopsin are found in which digestive fluids?
Pancreatic juice
What event that is likely to occur in the blood entering pulmonary capillaries?
Reverse chloride shift
Angiotensinogen II is a vasodilator. True/false?
False. It is a vasoconstrictor.
Mandible is an unpaired cranial bone. True/false?
False. It is an unpaired facial bone. Sphenoid bone is an unpaired cranial bone.
The somatic neural system of the peripheral nervous system relays information between
CNS and skeletal muscles.
Autonomous neural system relays information between
CNS and smooth muscles
Mule is formed by cross hybridisation. True/false?
False. It is formed by interspecific hybridisation.
What is the role of bicarbonate ions in stomach?
Protection of stomach wall from acid along with mucus
The mucus and bicarbonates in the intestinal mucosa are rescreted by
Pancreas
Which order does the plant Porella belong to?
Bryophyte (liverwort)
Polyethylene glycol enhances or induces fusion of protoplasts, true/false?
True
Sodium chloride enhances or induces fusion of protoplasts, true/false?
True
The UN Conference of Parties on climate change in the year 2011 was held in which country?
South Africa
In ETS, Oxygen acts as an electron acceptor only. True/false?
False. Oxygen acts as the final electron acceptor and also as a hydrogen ion acceptor.
Cyt c is small mobile protein attached to outer surface of inner membrane of mitochondria, true/false?
True.
Is equisetum heterosporous or homosporous?
Homosporous
Is Adiantum heterosporous or homosporous?
Homosporous
All the mammals have body hair without any exceptions. True/false?
False.
Do chondrichthyes have paired appendages?
Yes
Removal of proximal convoluted tubule from the nephron will result in
Dilute urine
Sertoli cells are involved in release of ABP, true/false?
True. (ABP: Androgen binding protein)
Sertoli cells inhibits the secretion of anti mullerian hormone. True/false?
False. They release anti mullerian hormone.
Presence of which of the following hormone in urine represents fertile period in a female during her fertile age?
Leutinizing hormone
Is tiger cat a placental or marsupial mammal?
Marsupial mammal
A characteristic mushroom shaped gland is present in which segments of cockroach?
6 to 7
Photoreceptors in human eye are depolarised during darkness and become hyperpolarized in response to the light stimulus. True/false?
True
Restorage of nucleocytoplasmic ratio is performed in
M phase
The parotid, sub-maxillary and sub-lingual salivary glands are located just outside the buccal cavity and secrete salivary juice into the buccal cavity. True/false.
True
Chloroplasts are aligned with their flat surface, parallel to the tangential wall of cells when
1) Moderate incident light comes
2) Diffused light comes
3) Plant is kept in strong light
4) `When intermittent strong and diffused light is given
2
What condition of chloroplast is known as epistrophe?
Chloroplast align parallel to the walls of mesophyll cells (mainly palisade cells) when intensity of light is minimum, to get more and more of light.
What is parastrophe?
When the intensity of light is maximum the chloroplast gets aligned perpendicular to the mesophyll cells to avoid photooxidation of chlorophyll a molecule This condition is called Parastrophe.
What is the alignment of chloroplast is medium light called?
Apostrophe
Name all the unpaired cranial bones.
Frontal
Occipital
Sphenoid
Ethmoid
Name the unpaired facial bones.
Vomer
Mandible
Hyoid
Are conidia arranged basipetally on conidiospores?
Yes
WHat is a hypogynous ovary?
Superior ovary
What type of placentation does mustard have?
Parietal placentation
In Nepenthes, the coiled tendril like structure is the modification of
Petiole
Tyloses are present in lumen of tracheids. True/false?
False. They are present only in vessels.
Epithem cells are
Loosely arranged parenchyma cells below the hydathodes
Epithem refers to the loosely arranged cells at the dead end of veins (hydathodes) through which water oozes out as a dilute solution of minerals under the influence of positive root pressure. This process is called as guttation.
During daytime, the opening of stomata involves influx of Cl– ions inside the guard cells. True/false
True
During daytime, the opening of stomata involves increase in the concentration of malic acid in guard cells. True/false?
False. Potassium malate is formed in guard cells, not malic acid.
The first electron acceptor in cyclic photophosphorylation is
FeS
In C4 plants, PEP carboxylase and RuBisCO enzymes are present in which parts of cells?
Cytosol and stroma
Cytochrome c-oxidase complex contains
Cyt a, Cyt a3, Cu centres
Control of metabolism is a function of DNA. True/false
False
In prokaryotes during DNA replication, which enzyme has exonuclease activity in both 5’—-> 3’ and 3’ —> 5’ directions?
DNA polymerase 1
The number of genes present on the human - ``Y’’- chromosome, is
231
Sebaceous gland secretion mainly contains
Sterols and hydrocarbons
Name an inorganic cofactor present in cytochrome oxidase.
Cu2+
Enamel is secreted by A which are B in origin.
A- ameloblast cells
B- ectodermal`
Filiform papillae are the smallest papillae. true/false?
True
The protein coat around the core of HIV is made of
P24
What is the genetic material of hepatitis A virus?
ss Rna
The ions essential for cardiac muscle contraction are
Na+, Ca2+
Genu and splenium are the parts of
Corpus callosum
Free nerve endings of skin receptors in humans are concerned with sense of
Pain
Destruction of –––I––– secreting –––II––– of substantia nigra leads to Parkinson’s disease
I- dopamine
II- Pars compacta
What is the function of somatostatin?
Suppresses release of hormones from pancreas
WHat is the function of Enterogastrone?
Slows gastric contraction
What is the function of Enterocrinin?
Stimulates crypts of lieberkuhn to release enzymes in pancreatic juice
What is the function of secretin?
Releases bicarbonate in pancreatic juice
Tunica media is thick in arteries and thin in veins. True/false?
True
Selaginella is a bryophyte. True/false?
False. It is a pteridophyte.
Semi–autonomous cell organelles and bacteria resemble with each other in their double membrane structure. True/false?
False. Bacteria don’t have double membrane structure.
In which stage of cell cycle does duplication of centrioles occur?
S phase
Root nodules are formed due to division and growth of
Cortex and pericycle cells
Aloe belongs to the family Solanaceae. True/false?
False. It is a monocot.
C4 acid is converted into C3 acid and vice–versa in sugarcane leaf in
Malic acid (4C) ——> Pyruvate (3C) (Bundle sheath cell)
PEP (3C) ——> Malic acid (4C) (Mesophyll cell cytoplasm)
Is barley a monocot or a dicot?
A monocot
Orchid seeds are monocot and endospermic. True/false?
False. They are non endospermic.
In Turner’s syndrome, the individual has the chromosome complement as 45 + XO. True/false?
False.
THey have genetic complement 44 + XO
Which enzyme is also known as Kornberg enzyme?
DNA Polymerase 1
Jacobson’s organ is found in
Some reptiles
Weberian ossicles are found in
Some osteichthyes
Organ of Bojanus is found in
Molluscs
What is the excretory structure of Nereis?
Nephridia
What type of excretory structure is present in Lepisma?
Malpighian tubules
<i>Palaemon</i> is the scientific name of
Shrimp
Green glands are found in Palaemon. True/false?
True
Approximately, how much blood is pumped out by both the ventricles, per cardiac cycle?
140 ml
What type of junctions are present in intercalated disc of cardiac muscles?
Gap junction
Amniotic fluid extracted for the purpose of amniocentesis actually contains
Exfoliated somatic cells from foetus
Number of nitrogen in adenine molecule is
5
Antianxiety drug includes amphetamines. True/false?
False. They comtain barbiturates.
The action of adrenaline on heart is via which secondary messenger?
cAMP
Based on photoperiod, what type of plant is rice?
Short day plant
Based on photoperiod, what type of plant is soyabean?
Short day plant
Based on photoperiod, what type of plant is tobacco?
Short day plant
Based on photoperiod, what type of plant is tomato?
Day neutral plant
Based on photoperiod, what type of plant is henbane?
Long day plant
Based on photoperiod, what type of plant is sugarbeet?
Long day plant
Based on photoperiod, what type of plant is cucumber?
Day neurtal plant
Based on photoperiod, what type of plant is potato?
Long day plant
