Biology MCQs

Page No. 107

Alternation of generations is absent in___________?


aHydration


bObelia


cJelly fish


dPhysalia


View Answer Hydration

The single healthy megaspore retained within the megasporangium germinates to form an egg containing female gaemtophyte called______________?


aOvule


bSeed


cFruit


dEmbroyo sac


View Answer Embroyo sac

Pollen grains in pinus have __________ for dispersal through wind?


aFlagella


bCilia


cWings


dFeathers


View Answer Wings

Pox viruses are_________?


aRNA non-enveloped


bRNA enveloped


cDNA non-enveloped


dDNA enveloped


View Answer DNA enveloped

Destruction of all life forms is called___________?


aSterilization


bDisinfection


cAntisepsis


dPreservation


View Answer Sterilization

Reverse transcriptase is present in____________?


aAll RNA viruses


bAll DNA viruses


cAll retroviruses


dAll viruses


View Answer All retroviruses

It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect:


aOlder sediment layers have equal amount of these reaioactive isotopes as that of the young ones


bOlder sediment layers have less amount of these reaioactive isotopes as that of the young ones.


cOlder sediment layers have greater amount of these radioactive isotopes as that of the young ones.


dOlder sediment layers did not have these radioactive isotopes



Bacteria which grow either in the presence or absence of oxygen___________?


aAerobic bacteria


bAnaerobic bacteria


cFacultative bacteria


dMicroaerophilic


View Answer Facultative bacteria

___________ is used to relieve one kind of headache, migraine?


aPencillin


bLovastatin


cCyclosporine


dErgotin


View Answer Ergotin

Cytoskeleton involved in assembly and disassembly of the spindle during mitosis is of_________?


aMicrotubules


bMicrofilaments


cIntermediate filaments


dNone of these


View Answer Microtubules

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