Biology MCQs

Page No. 119

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 radioactive isotopes as that of the young ones


bOlder sediment layers have less amount of these radioactive 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



Normally, in the process of osmosis, the net flow of water molecules into or out of the cell depends upon differences in the ?


aConcentration of water molecules inside and outside the cell


bConcentration of enzymes on either side of the cell membrane


cRate of molecular motion on either side of the cell membrane


dNone of these



Most cell membranes are composed principally of ?


aDNA ad protein


bProtein and Lipids


cProtein and Chitin


dProtein and RNA


View Answer Protein and Lipids

Which of the following pathogen type cause disease that can be treated with antibiotics ?


abacteria


bfungi


cvirus


dnone of these


View Answer bacteria

The evaporative cooling in the respiratory tract of dogs is called?


aVasodilation


bVasoconstriction


cPanting


dAll of these


View Answer Panting

Production of sweat and sebum is related with ?


aSkin


bLiver


cLungs


dGIT


View Answer Skin

In animals coordination is achieved by means of?


aNervous system


bEndocrine system


cRespiratory system


dBoth A and B


View Answer Both A and B

Haemodialysis means cleaning of____________?


aUrine


bBlood


cGlomerular filterate


dCoelomic fluid


View Answer Blood

A structure formed by groups of similar cells organized into loose sheets or bundles performing similar functions is called as:


aAn organ


bAn organism


cA Tissue


dA Cell


View Answer A Tissue

Which one of them is a micro-molecule?


aPolysaccharide


bProtein


cHemoglobin


dATP


View Answer ATP

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