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level: biology

Questions and Answers List

level questions: biology

Question	Answer
second messanger will be formed in which hormone	adrenaline
this organism is unicellular, edible and have prokaryotic characters	spirulina
white fat-monolocular adipocytes	hump of camel
-they have dorso-ventrally flat body -fertilization is internal	platyhelminthes
an elaborate network of filamentous_____ structures present in the cytoplasm is collectively referred to as the_____	proteinaceous, cytoskeleton
-double membrane bounded -outer membrane is more permeable than the inner membrane -ATP synthesizing capacity are characteristics of which organelles	mitochondria and chloroplast
macronutrients that form components of fertilizers	N,P,K and S
inheritance of starch grains size in pea plant shows	incomplete dominance
in RNAi ,the genes are silenced using	ds-RNA
blood carries the CO2 in 3 forms -as carbino haemoglobin in RBC -as bicarbonates -dissolved in plasma then what are the percent in each	20-25 per cent, 70 per cent, 7 per cent
head of humerus articulate with _____ to form ______	glenoid cavity, shoulder joint
sacromere is the portion between	Z to Z line
which one is not a structural characteristic of community	productivity
the logistic population growth is expressed by the equation	dN/dt= rN {k-N/k}
a single ovule is present in _____ placentation which is present in____	basal, chinarose
solanaceae family characteristics	exstipulate leaves alternate leaves swollen placenta tap root
meristem which is not involved in secondary growth is	marginal meristem
besides main DNA another small and ds circular DNA is also present in bacterial cell called	plasmid
multicellular and branched rhizoids elaborate mechanism of spore dispersal absence of vascular tissues	funaria
pteridophytes differ from gymnosperms in having	independent alternation of gymnosperms
ovules are not enclosed by ovary wall in	gymnosperms
the NADP reductase enzyme is located on	the stroma side of thylakoid membrane
glycerol would enter the respiratory pathway after being converted to	PGAL
closure of stomata	ABA
DNA polymerase used in PCR is remains active at	high temperature
structures present in fallopian tube are	secondary oocyte, egg cell/ovum, zygote
NH3 is excretory waste in which of the following	fishes
one example of animals having a single opening to the outsie that serves both as mouth as well as anus is	fasciola
petromyzon is not a true fish because of	absence of paired fins and true jaws
level of organisation in porifera is	cellular
platyhelminthes are	triploblastic, bilaterally symmetrical
in multicellular animals a agroup of similaar cells along with intercellular substances perform a specific function such an organisation is called	tissue
ciliated epithelium is present in	trachea
uric acid is the chief nitrogenous component of the excretory products of	cockroach
glycerol is a simple lipid which is also known as	trihydroxy propane
when two indivisuals heterozygous for the same genes are breed together, they produce	both recessive and dominant phenotypes
a haemophilic man marries a normal woman whose father was haemophilic, if they produces two sons and two daughters, how many of them would be sufferer	one son and one daughter
if an inheritable mutation is observed in a population at high frequency, then it is refered as	DNA polymorphism
aminoacylation of tRNA is essential for	formation of peptide bond
the region of DNA sequence that provides binding site for RNA polymerase	promoter site
which of the following semi-dwarf rice variety indroduced in india from IRRI	IR-8
pusa komal is resistant to which disease	bacterial blight
which of the following restriction endonuclease not produce sticky end	Hae III
which cry gene codes for the protien which can control the corn barer effectively	Cry I Ab
which protist lacks cell wall in its whole life cycle	euglena
-they have chlorophyll a,d and phycoerythrin as major pigments -they have floridean starch as stored food -cell wall is made up of cellulose, pectin and polysulphate esters	rhodophycease
a thallus of marchantia (liverwort) has	either antheridia or archegonia
prions are made up of	only protien
in nerve cord of cockroach how many ganglia present in the thorax and abdomen	3,6
choanocytes are present in	sycon
which type of scales are found on the skin of cartilaginous fishes	placoid
epithelium with microvilli	gall bladder
the total annual net productivity of whole biosphere is	170 billion ton
which one of the following has the highest number of species in nature	fishes
which are correct if biotic potential of a species is higher, then	number of individuals of particular species increases
tonoplast is membrane of	vacuole
which of the following is not a procaryotic cell	amoeba
which of the following is not a correct statement for non-competitive irreversible inhibition of enzymes	inhibitor action can be overcome by increasing the substrate concentration
opening and closing of stomata are respectively promoted by	cytokinin,ABA
injections of toxoid as vaccine is given to prevent	diphtheria
activation of B-lymphocytes is done by	IgD
which of the following is not a hyperglycemic hormone	insulin
which of the following is the major coordinating center for sensory and motor signalling	thalamus
the axoplasm contains high concentration of _____ and negatively charged protiens and low concentration of _____	k+ ions, Na+ ions
the wings of sparrow and wings of housefly are	an example of analogous structures and represent convergent evolution
osteoporosis, an age-related disease of skeletal system, may occur due to	decreased level of estrogen
the living differentiated cell, which has lost the capacity to divide, can regain capacity of division under certain conditions. this phenomenon is called	dedifferentiation
which is not a bast fibre	cotton
in castor plant	geitonogamy is possible
In a cross between individuals homozygous for (a, b) and wild type (++). In this cross 700 out of 1000 individuals were of parental type. Then the distance between a and b is :	30 map unit
Psilotum, Azolla, Equisetum, Salvinia, Adiantum, Selaginella, Marsilea, Lycopodium, Cycas. How many examples are correct for showing heterosporous nature ?	5
In full blown AIDS, opportunistic infections are caused by :-	Mycobacterium Toxoplasma Fungi